From 3c98ffaa01315f96b316fc86cb65f31b8091621b Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sat, 16 Apr 2022 17:23:24 +0800
Subject: [PATCH 01/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E7=B1=BB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/hongyi/day10/PersonTest.java     | 39 +++++++++++++++++++
 .../main/java/com/hongyi/day10/UserTest.java  | 33 ++++++++++++++++
 2 files changed, 72 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day10/PersonTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day10/UserTest.java

diff --git a/javase/src/main/java/com/hongyi/day10/PersonTest.java b/javase/src/main/java/com/hongyi/day10/PersonTest.java
new file mode 100644
index 0000000..6c5f977
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day10/PersonTest.java
@@ -0,0 +1,39 @@
+package com.hongyi.day10;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/16 16:30
+ * @Version 1.0
+ */
+public class PersonTest {
+    public static void main(String[] args) {
+        Person person = new Person();
+        // 调用属性和方法
+        person.name = "Mark";
+        System.out.println(person.name);
+        System.out.println(person.age);
+        person.eat();
+        person.sleep();
+        person.talk("English");
+    }
+}
+
+class Person {
+    // 属性
+    String name;
+    int age = 1;
+    boolean isMale;
+
+    // 方法
+    public void eat() {
+        System.out.println("eat...");
+    }
+
+    public void sleep() {
+        System.out.println("sleep...");
+    }
+
+    public void talk(String language) {
+        System.out.println("talk: " + language);
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day10/UserTest.java b/javase/src/main/java/com/hongyi/day10/UserTest.java
new file mode 100644
index 0000000..bd93e80
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day10/UserTest.java
@@ -0,0 +1,33 @@
+package com.hongyi.day10;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/16 17:04
+ * @Version 1.0
+ */
+public class UserTest {
+    public static void main(String[] args) {
+        User user = new User();
+        System.out.println(user.name); // null
+        System.out.println(user.age); // 0
+        System.out.println(user.isMale); // false
+    }
+}
+
+class User {
+    // 属性或成员变量
+    String name;
+    protected int age;
+    boolean isMale;
+
+    // 方法
+    public void talk(String language) { // 形参language，也是局部变量
+        System.out.println("talking: " + language);
+    }
+
+    public void eat() {
+        // 局部变量food
+        final String food = "川菜";
+        System.out.println("eat: " + food);
+    }
+}
-- 
Gitee


From 4f780018bf87bbf068ec3441ff1d4ce8fb3fed81 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Fri, 22 Apr 2022 15:51:50 +0800
Subject: [PATCH 02/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E7=B1=BB?=
 =?UTF-8?q?=E7=9A=84=E6=96=B9=E6=B3=95=20=E5=80=BC=E4=BC=A0=E9=80=92?=
 =?UTF-8?q?=E6=9C=BA=E5=88=B6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/hongyi/day11/InstanceTest.java   | 47 +++++++++++++++++++
 .../java/com/hongyi/day11/OverloadTest.java   | 31 ++++++++++++
 .../com/hongyi/day11/ValueTransferTest.java   | 31 ++++++++++++
 .../com/hongyi/day11/ValueTransferTest1.java  | 23 +++++++++
 .../com/hongyi/day11/ValueTransferTest2.java  | 29 ++++++++++++
 5 files changed, 161 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day11/InstanceTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day11/OverloadTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day11/ValueTransferTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day11/ValueTransferTest1.java
 create mode 100644 javase/src/main/java/com/hongyi/day11/ValueTransferTest2.java

diff --git a/javase/src/main/java/com/hongyi/day11/InstanceTest.java b/javase/src/main/java/com/hongyi/day11/InstanceTest.java
new file mode 100644
index 0000000..e24981f
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day11/InstanceTest.java
@@ -0,0 +1,47 @@
+package com.hongyi.day11;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/22 14:50
+ * @Version 1.0
+ */
+public class InstanceTest {
+    public static void main(String[] args) {
+        Phone p = new Phone();
+        System.out.println(p);
+        p.playGame();
+        p.sendMail();
+
+        // 匿名
+        new Phone().sendMail();
+        new Phone().price = 1999;
+        new Phone().showPrice(); // 0.0
+
+        // 匿名对象的使用
+        PhoneFactory mall = new PhoneFactory();
+        mall.show(new Phone());
+    }
+}
+
+class PhoneFactory {
+    public void show(Phone phone) {
+        phone.sendMail();
+        phone.playGame();
+    }
+}
+
+class Phone {
+    double price;
+
+    public void sendMail() {
+        System.out.println("send mail...");
+    }
+
+    public void playGame() {
+        System.out.println("play game...");
+    }
+
+    public void showPrice() {
+        System.out.println("price is: " + this.price);
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day11/OverloadTest.java b/javase/src/main/java/com/hongyi/day11/OverloadTest.java
new file mode 100644
index 0000000..a24f135
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day11/OverloadTest.java
@@ -0,0 +1,31 @@
+package com.hongyi.day11;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/22 15:00
+ * @Version 1.0
+ */
+public class OverloadTest {
+    public static void main(String[] args) {
+        OverloadTest test = new OverloadTest();
+        test.getSum(1, 1); // 1 2
+    }
+    // 以下都是重载的实例
+    public void getSum(int i, int j) {
+        System.out.println("1");
+        System.out.println(i + j);
+    }
+
+    public void getSum(double i, double j) {
+        System.out.println("2");
+        System.out.println(i + j);
+    }
+
+    public void getSum(int i, String s) {
+        System.out.println("3");
+    }
+
+    public void getSum(String s, int i) {
+        System.out.println("4");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day11/ValueTransferTest.java b/javase/src/main/java/com/hongyi/day11/ValueTransferTest.java
new file mode 100644
index 0000000..bbf586d
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day11/ValueTransferTest.java
@@ -0,0 +1,31 @@
+package com.hongyi.day11;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/22 15:13
+ * @Version 1.0
+ */
+public class ValueTransferTest {
+    public static void main(String[] args) {
+        // 基本数据类型
+        int m = 10;
+        int n = m;
+        System.out.println("m = " + m + ", n = " + n); // 10, 10
+        n = 20;
+        System.out.println("m = " + m + ", n = " + n); // 10, 20
+
+        // 引用数据类型
+        Order o1 = new Order();
+        o1.id = 1001;
+
+        Order o2 = o1; // 赋值以后，栈中的o1和o2的地址都指向堆中同一个对象
+        System.out.println("o1.id: " + o1.id + ", o2.id: " + o2.id); // 1001 1001
+
+        o2.id = 1002;
+        System.out.println("o1.id: " + o1.id + ", o2.id: " + o2.id); // 1002 10002
+    }
+}
+
+class Order {
+    int id;
+}
diff --git a/javase/src/main/java/com/hongyi/day11/ValueTransferTest1.java b/javase/src/main/java/com/hongyi/day11/ValueTransferTest1.java
new file mode 100644
index 0000000..4e73cf8
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day11/ValueTransferTest1.java
@@ -0,0 +1,23 @@
+package com.hongyi.day11;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/22 15:23
+ * @Version 1.0
+ */
+public class ValueTransferTest1 {
+    public static void main(String[] args) {
+        int m = 10;
+        int n = 20;
+        ValueTransferTest1 test = new ValueTransferTest1();
+        test.swap(m, n);
+        System.out.println("m = " + m + ", n = " + n); // 10 20
+    }
+
+    public void swap(int m, int n) {
+        int temp = m;
+        m = n;
+        n = temp;
+        System.out.println("m = " + m + ", n = " + n); // 20 10
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day11/ValueTransferTest2.java b/javase/src/main/java/com/hongyi/day11/ValueTransferTest2.java
new file mode 100644
index 0000000..2fc393a
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day11/ValueTransferTest2.java
@@ -0,0 +1,29 @@
+package com.hongyi.day11;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/22 15:38
+ * @Version 1.0
+ */
+public class ValueTransferTest2 {
+    public static void main(String[] args) {
+        Data data = new Data();
+        data.m = 10;
+        data.n = 20;
+        System.out.println("m = " + data.m + ", n = " + data.n); // 10 20
+        ValueTransferTest2 test = new ValueTransferTest2();
+        test.swap(data);
+        System.out.println("m = " + data.m + ", n = " + data.n); // 20 10
+    }
+
+    public void swap(Data data) {
+        int temp = data.m;
+        data.m = data.n;
+        data.n = temp;
+    }
+}
+
+class Data {
+    int m;
+    int n;
+}
-- 
Gitee


From 20a795575baf236c2b05d896f3e3f643813d40f7 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Fri, 22 Apr 2022 16:29:51 +0800
Subject: [PATCH 03/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E5=B0=81?=
 =?UTF-8?q?=E8=A3=85=E5=92=8C=E6=9D=83=E9=99=90=E4=BF=AE=E9=A5=B0=E7=AC=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/java/com/hongyi/day10/OrderTest.java | 23 ++++++++
 .../java/com/hongyi/day11/AnimalTest.java     | 53 +++++++++++++++++++
 .../src/main/java/com/hongyi/day11/Order.java | 27 ++++++++++
 .../main/java/com/hongyi/day11/OrderTest.java | 21 ++++++++
 .../com/hongyi/day11/ValueTransferTest.java   |  6 +--
 5 files changed, 127 insertions(+), 3 deletions(-)
 create mode 100644 javase/src/main/java/com/hongyi/day10/OrderTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day11/AnimalTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day11/Order.java
 create mode 100644 javase/src/main/java/com/hongyi/day11/OrderTest.java

diff --git a/javase/src/main/java/com/hongyi/day10/OrderTest.java b/javase/src/main/java/com/hongyi/day10/OrderTest.java
new file mode 100644
index 0000000..82b057d
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day10/OrderTest.java
@@ -0,0 +1,23 @@
+package com.hongyi.day10;
+
+import com.hongyi.day11.Order;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/22 16:23
+ * @Version 1.0
+ */
+// 与Order位于不同的包
+public class OrderTest {
+    public static void main(String[] args) {
+        Order o = new Order();
+        // 'orderDefault' is not public in 'com.hongyi.day11.Order'. Cannot be accessed from outside package
+        // o.orderDefault = 1;
+        o.orderPublic = 2;
+        // o.orderPrivate = 3;
+
+        // o.methodDefault();
+        o.methodPublic();
+        // o.orderPrivate();
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day11/AnimalTest.java b/javase/src/main/java/com/hongyi/day11/AnimalTest.java
new file mode 100644
index 0000000..f993650
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day11/AnimalTest.java
@@ -0,0 +1,53 @@
+package com.hongyi.day11;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/22 15:58
+ * @Version 1.0
+ */
+public class AnimalTest {
+    public static void main(String[] args) {
+        Animal animal = new Animal();
+//        animal.name = "frog";
+//        animal.age = 24;
+//        animal.legs = 4;
+//        System.out.println(animal);
+
+        // animal.setLegs(-1); // 抛出异常
+        animal.setLegs(6);
+        System.out.println(animal.getLegs()); // 6
+    }
+}
+
+class Animal {
+    private String name;
+    private int age;
+    private int legs; // 将属性legs定义为private，只能被Animal类内部访问
+
+    // 属性设置
+    public void setLegs(int l) {
+        if (l >= 0 && l % 2 ==0) {
+            legs = l;
+        } else {
+            throw new RuntimeException("输入值错误!");
+        }
+    }
+
+    // 属性获取
+    public int getLegs() {
+        return legs;
+    }
+
+    public void eat() {
+        System.out.println("eat...");
+    }
+
+    @Override
+    public String toString() {
+        return "Animal{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                ", legs=" + legs +
+                '}';
+    }
+}
\ No newline at end of file
diff --git a/javase/src/main/java/com/hongyi/day11/Order.java b/javase/src/main/java/com/hongyi/day11/Order.java
new file mode 100644
index 0000000..0a5a43d
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day11/Order.java
@@ -0,0 +1,27 @@
+package com.hongyi.day11;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/22 16:19
+ * @Version 1.0
+ */
+public class Order {
+    private int orderPrivate;
+    int orderDefault;
+    public int orderPublic;
+
+    // 在类内部都可以使用
+    private void methodPrivate() {
+        orderPrivate = 1;
+        orderDefault = 2;
+        orderPublic = 3;
+    }
+
+    void methodDefault() {
+
+    }
+
+    public void methodPublic() {
+
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day11/OrderTest.java b/javase/src/main/java/com/hongyi/day11/OrderTest.java
new file mode 100644
index 0000000..3a7a0dd
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day11/OrderTest.java
@@ -0,0 +1,21 @@
+package com.hongyi.day11;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/22 16:20
+ * @Version 1.0
+ */
+// 与Order位于同一个包
+public class OrderTest {
+    public static void main(String[] args) {
+        Order o = new Order();
+        o.orderDefault = 1;
+        o.orderPublic = 2;
+        // 'orderPrivate' has private access in 'com.hongyi.day11.Order'
+        // o.orderPrivate = 3;
+
+        o.methodDefault();
+        o.methodPublic();
+        // o.orderPrivate();
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day11/ValueTransferTest.java b/javase/src/main/java/com/hongyi/day11/ValueTransferTest.java
index bbf586d..21371bf 100644
--- a/javase/src/main/java/com/hongyi/day11/ValueTransferTest.java
+++ b/javase/src/main/java/com/hongyi/day11/ValueTransferTest.java
@@ -15,10 +15,10 @@ public class ValueTransferTest {
         System.out.println("m = " + m + ", n = " + n); // 10, 20
 
         // 引用数据类型
-        Order o1 = new Order();
+        Order1 o1 = new Order1();
         o1.id = 1001;
 
-        Order o2 = o1; // 赋值以后，栈中的o1和o2的地址都指向堆中同一个对象
+        Order1 o2 = o1; // 赋值以后，栈中的o1和o2的地址都指向堆中同一个对象
         System.out.println("o1.id: " + o1.id + ", o2.id: " + o2.id); // 1001 1001
 
         o2.id = 1002;
@@ -26,6 +26,6 @@ public class ValueTransferTest {
     }
 }
 
-class Order {
+class Order1 {
     int id;
 }
-- 
Gitee


From b018e119199be22f3395230d5ceddd46e8c0499a Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sun, 24 Apr 2022 15:44:41 +0800
Subject: [PATCH 04/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E6=9E=84?=
 =?UTF-8?q?=E9=80=A0=E5=99=A8=E5=92=8Cthis=E5=85=B3=E9=94=AE=E5=AD=97?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/hongyi/day12/PersonTest.java     | 49 ++++++++++++++
 .../java/com/hongyi/day12/PersonTest1.java    | 67 +++++++++++++++++++
 2 files changed, 116 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day12/PersonTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day12/PersonTest1.java

diff --git a/javase/src/main/java/com/hongyi/day12/PersonTest.java b/javase/src/main/java/com/hongyi/day12/PersonTest.java
new file mode 100644
index 0000000..264b1f2
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day12/PersonTest.java
@@ -0,0 +1,49 @@
+package com.hongyi.day12;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/24 15:08
+ * @Version 1.0
+ */
+public class PersonTest {
+    public static void main(String[] args) {
+        // 创建类的实例
+        Person p1 = new Person(); // No Params Constructor...
+        Person p2 = new Person("Hongyi");
+        Person p3 = new Person(24);
+        Person p4 = new Person("Mark", 24);
+    }
+}
+
+class Person {
+    private String name;
+    private int age;
+
+    // 空参构造器
+    public Person() {
+        System.out.println("No Params Constructor...");
+    }
+
+    // 多个有参构造器
+    public Person(String name) {
+        this.name = name;
+    }
+
+    public Person(int age) {
+        this.age = age;
+    }
+
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+
+    public void eat() {
+        System.out.println("eat...");
+    }
+
+    public void learn() {
+        System.out.println("learn");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day12/PersonTest1.java b/javase/src/main/java/com/hongyi/day12/PersonTest1.java
new file mode 100644
index 0000000..6e7adbb
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day12/PersonTest1.java
@@ -0,0 +1,67 @@
+package com.hongyi.day12;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/24 15:22
+ * @Version 1.0
+ */
+public class PersonTest1 {
+    public static void main(String[] args) {
+        Person1 p1 = new Person1();
+        p1.setName("Mark");
+        System.out.println(p1.getName()); // Mark
+        p1.eat();
+    }
+}
+
+class Person1 {
+    private String name;
+    private int age;
+
+    public Person1() {
+        this.eat();
+    }
+
+    public Person1(String name) {
+        this(); // 调用空参构造器
+        this.name = name;
+    }
+
+    public Person1(String name, int age) {
+        this(name); // 调用上一个构造器
+        this.age = age;
+    }
+
+    public void setName(String name) {
+        // this理解为当前对象
+        // 形参名和属性名相同时，必须使用this
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setAge(int a) {
+        // 形参名和属性名不同，可以不使用this
+        age = a;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void eat() {
+        System.out.println("eat...");
+        // 这里的this可以省略
+        this.speak();
+    }
+
+    public void speak() {
+        System.out.println("speak...");
+    }
+}
-- 
Gitee


From b511b3b86b005c452de4cc8dc2f3b3004c461da1 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sun, 24 Apr 2022 17:19:11 +0800
Subject: [PATCH 05/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E7=BB=A7?=
 =?UTF-8?q?=E6=89=BF=20=E6=96=B9=E6=B3=95=E9=87=8D=E5=86=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/hongyi/day12/ExtendsTest.java    | 22 ++++++++++
 .../main/java/com/hongyi/day12/People.java    | 26 +++++++++++
 .../main/java/com/hongyi/day12/Student.java   | 21 +++++++++
 .../main/java/com/hongyi/day13/Person.java    | 44 +++++++++++++++++++
 .../java/com/hongyi/day13/PersonTest.java     | 15 +++++++
 .../main/java/com/hongyi/day13/Student.java   | 28 ++++++++++++
 6 files changed, 156 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day12/ExtendsTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day12/People.java
 create mode 100644 javase/src/main/java/com/hongyi/day12/Student.java
 create mode 100644 javase/src/main/java/com/hongyi/day13/Person.java
 create mode 100644 javase/src/main/java/com/hongyi/day13/PersonTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day13/Student.java

diff --git a/javase/src/main/java/com/hongyi/day12/ExtendsTest.java b/javase/src/main/java/com/hongyi/day12/ExtendsTest.java
new file mode 100644
index 0000000..6289d86
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day12/ExtendsTest.java
@@ -0,0 +1,22 @@
+package com.hongyi.day12;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/24 15:53
+ * @Version 1.0
+ */
+public class ExtendsTest {
+    public static void main(String[] args) {
+        People p1 = new People();
+        p1.setAge(24);
+        p1.setName("Mark");
+        p1.eat();
+        p1.sleep();
+
+        Student s1 = new Student();
+        s1.setAge(24); // 使用父类中的属性和方法
+        s1.setName("Hongyi");
+        s1.setMajor("Computer Science");
+        s1.learn();
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day12/People.java b/javase/src/main/java/com/hongyi/day12/People.java
new file mode 100644
index 0000000..cab1e1c
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day12/People.java
@@ -0,0 +1,26 @@
+package com.hongyi.day12;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/24 15:49
+ * @Version 1.0
+ */
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class People {
+    private String name;
+    private int age;
+
+    public void eat() {
+        System.out.println("eat...");
+    }
+
+    public void sleep() {
+        System.out.println("sleep...");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day12/Student.java b/javase/src/main/java/com/hongyi/day12/Student.java
new file mode 100644
index 0000000..5cd4896
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day12/Student.java
@@ -0,0 +1,21 @@
+package com.hongyi.day12;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/24 15:50
+ * @Version 1.0
+ */
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class Student extends People{
+    private String major; // 定义自己的属性
+
+    public void learn() { // 定义自己的方法
+        System.out.println("learn...");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day13/Person.java b/javase/src/main/java/com/hongyi/day13/Person.java
new file mode 100644
index 0000000..535439d
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day13/Person.java
@@ -0,0 +1,44 @@
+package com.hongyi.day13;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/24 16:19
+ * @Version 1.0
+ */
+public class Person {
+    private String name;
+    private int age;
+
+    public Person() {
+
+    }
+
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public void eat() {
+        System.out.println("eat...");
+    }
+
+    public void walk(int distance) {
+        System.out.println("walk: " + distance);
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day13/PersonTest.java b/javase/src/main/java/com/hongyi/day13/PersonTest.java
new file mode 100644
index 0000000..57005ad
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day13/PersonTest.java
@@ -0,0 +1,15 @@
+package com.hongyi.day13;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/24 16:24
+ * @Version 1.0
+ */
+public class PersonTest {
+    public static void main(String[] args) {
+        Student s = new Student("Mark", 24, "Computer Science");
+        s.eat(); // Student eat...
+        s.walk(10);
+        s.learn();
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day13/Student.java b/javase/src/main/java/com/hongyi/day13/Student.java
new file mode 100644
index 0000000..f8ff460
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day13/Student.java
@@ -0,0 +1,28 @@
+package com.hongyi.day13;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/24 16:20
+ * @Version 1.0
+ */
+public class Student extends Person{
+    private String major;
+
+    public Student() {
+
+    }
+
+    public Student(String name, int age, String major) {
+        super(name, age);
+        this.major = major;
+    }
+
+    public void learn() {
+        System.out.println("learn: " + this.major);
+    }
+
+    // 对父类方法eat的重写
+    public void eat() {
+        System.out.println("Student eat...");
+    }
+}
-- 
Gitee


From f431cc111c4c5867c61baf7955a9d2e1b54b151a Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Thu, 28 Apr 2022 20:28:53 +0800
Subject: [PATCH 06/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20super=E5=85=B3?=
 =?UTF-8?q?=E9=94=AE=E5=AD=97?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/java/com/hongyi/day14/Person.java    | 39 ++++++++++++++++
 .../main/java/com/hongyi/day14/Student.java   | 44 +++++++++++++++++++
 .../main/java/com/hongyi/day14/SuperTest.java | 16 +++++++
 3 files changed, 99 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day14/Person.java
 create mode 100644 javase/src/main/java/com/hongyi/day14/Student.java
 create mode 100644 javase/src/main/java/com/hongyi/day14/SuperTest.java

diff --git a/javase/src/main/java/com/hongyi/day14/Person.java b/javase/src/main/java/com/hongyi/day14/Person.java
new file mode 100644
index 0000000..00356a3
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day14/Person.java
@@ -0,0 +1,39 @@
+package com.hongyi.day14;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 19:38
+ * @Version 1.0
+ */
+public class Person {
+    String name;
+    int age;
+    int id = 1001; // 身份证号
+
+    // 空参构造器
+    public Person() {
+        System.out.println("I'm everywhere...");
+    }
+
+    public Person(String name) {
+        this.name = name;
+    }
+
+    public Person(int age) {
+        this.age = age;
+    }
+
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public void eat() {
+        System.out.println("eat...");
+    }
+
+    public void walk(int distance) {
+        System.out.println("walk: " + distance);
+    }
+
+}
diff --git a/javase/src/main/java/com/hongyi/day14/Student.java b/javase/src/main/java/com/hongyi/day14/Student.java
new file mode 100644
index 0000000..940d662
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day14/Student.java
@@ -0,0 +1,44 @@
+package com.hongyi.day14;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 19:38
+ * @Version 1.0
+ */
+public class Student extends Person{
+    String major;
+    int id = 1002; // 学号
+
+    public Student() {
+        // super();
+    }
+
+    public Student(String major) {
+        // 默认super()会出现在子类的所有构造器的首行
+        // super();
+        this.major = major;
+    }
+
+    public Student(String name, int age, String major) {
+        // 调用父类构造器
+        super(name, age);
+        this.major = major;
+    }
+
+    @Override
+    public void eat() {
+        System.out.println("Student eat...");
+    }
+
+    public void study() {
+        System.out.println("Student study...");
+        eat(); // 调用自身重写的方法
+        super.eat(); // 调用父类的方法
+    }
+
+    public void show() {
+        System.out.println("name = " + this.name + ", " + "age = " + super.age); // 子类没有这些属性，二者没有区别
+        System.out.println(id); // 子类id
+        System.out.println(super.id); // 父类id
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day14/SuperTest.java b/javase/src/main/java/com/hongyi/day14/SuperTest.java
new file mode 100644
index 0000000..8c78f3f
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day14/SuperTest.java
@@ -0,0 +1,16 @@
+package com.hongyi.day14;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 19:38
+ * @Version 1.0
+ */
+public class SuperTest {
+    public static void main(String[] args) {
+        Student s1 = new Student("Mark", 24, "Computer Science");
+        s1.show(); // name = Mark, age = 24 1002 1001
+
+        Student s2 = new Student("Computer Science"); // I'm everywhere...
+        Student s3 = new Student(); // I'm everywhere...
+    }
+}
-- 
Gitee


From e6c03b57cc7d87e6a6abb0b2ba276a7296563170 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Thu, 28 Apr 2022 21:19:13 +0800
Subject: [PATCH 07/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E5=A4=9A?=
 =?UTF-8?q?=E6=80=81?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/hongyi/day15/AnimalTest.java     | 53 +++++++++++++++++++
 .../src/main/java/com/hongyi/day15/Man.java   | 24 +++++++++
 .../main/java/com/hongyi/day15/Person.java    | 19 +++++++
 .../java/com/hongyi/day15/PersonTest.java     | 27 ++++++++++
 .../src/main/java/com/hongyi/day15/Woman.java | 24 +++++++++
 5 files changed, 147 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day15/AnimalTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day15/Man.java
 create mode 100644 javase/src/main/java/com/hongyi/day15/Person.java
 create mode 100644 javase/src/main/java/com/hongyi/day15/PersonTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day15/Woman.java

diff --git a/javase/src/main/java/com/hongyi/day15/AnimalTest.java b/javase/src/main/java/com/hongyi/day15/AnimalTest.java
new file mode 100644
index 0000000..a1002a5
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day15/AnimalTest.java
@@ -0,0 +1,53 @@
+package com.hongyi.day15;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 20:55
+ * @Version 1.0
+ */
+public class AnimalTest {
+    public static void main(String[] args) {
+        AnimalTest test = new AnimalTest();
+        test.func(new Dog());
+        test.func(new Cat());
+    }
+
+    public void func(Animal animal) { // Animal animal = new Dog();
+        animal.eat();
+        animal.shout();
+    }
+}
+
+class Animal {
+    public void eat() {
+        System.out.println("Animal eat");
+    }
+
+    public void shout() {
+        System.out.println("animal shout");
+    }
+}
+
+class Dog extends Animal {
+    @Override
+    public void eat() {
+        System.out.println("Dog eat");
+    }
+
+    @Override
+    public void shout() {
+        System.out.println("Dog shout");
+    }
+}
+
+class Cat extends Animal {
+    @Override
+    public void eat() {
+        System.out.println("Cat eat");
+    }
+
+    @Override
+    public void shout() {
+        System.out.println("Cat shout");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day15/Man.java b/javase/src/main/java/com/hongyi/day15/Man.java
new file mode 100644
index 0000000..b877ba1
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day15/Man.java
@@ -0,0 +1,24 @@
+package com.hongyi.day15;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 20:35
+ * @Version 1.0
+ */
+public class Man extends Person{
+    boolean isSmoking;
+
+    public void earnMoney() {
+        System.out.println("Man earn money");
+    }
+
+    @Override
+    public void eat() {
+        System.out.println("Man eat...");
+    }
+
+    @Override
+    public void walk() {
+        System.out.println("Man walk...");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day15/Person.java b/javase/src/main/java/com/hongyi/day15/Person.java
new file mode 100644
index 0000000..7c95b50
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day15/Person.java
@@ -0,0 +1,19 @@
+package com.hongyi.day15;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 20:34
+ * @Version 1.0
+ */
+public class Person {
+    String name;
+    int age;
+
+    public void eat() {
+        System.out.println("eat...");
+    }
+
+    public void walk() {
+        System.out.println("walk...");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day15/PersonTest.java b/javase/src/main/java/com/hongyi/day15/PersonTest.java
new file mode 100644
index 0000000..c101c31
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day15/PersonTest.java
@@ -0,0 +1,27 @@
+package com.hongyi.day15;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 20:38
+ * @Version 1.0
+ */
+public class PersonTest {
+    public static void main(String[] args) {
+        Person p1 = new Person();
+        p1.eat(); // eat...
+
+        Man man = new Man();
+        man.eat(); // Man eat...
+        man.earnMoney(); // Man earn money
+
+        //------------------------------
+
+        // 对象的多态：父类的引用指向子类的对象
+        Person p2 = new Man();
+        Person p3 = new Woman();
+        // 多态的使用：当调用父子类同名同参数的方法时，实际执行的是子类重写父类的方法--虚拟方法调用
+        p2.eat(); // Man eat...
+        p2.walk(); // Man walk...
+        // p2.earnMoney(); 不能调用Man中特有的方法
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day15/Woman.java b/javase/src/main/java/com/hongyi/day15/Woman.java
new file mode 100644
index 0000000..3f1a450
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day15/Woman.java
@@ -0,0 +1,24 @@
+package com.hongyi.day15;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 20:36
+ * @Version 1.0
+ */
+public class Woman extends Person{
+    boolean isBeauty;
+
+    public void goShopping() {
+        System.out.println("Woman go shopping");
+    }
+
+    @Override
+    public void eat() {
+        System.out.println("Woman eat...");
+    }
+
+    @Override
+    public void walk() {
+        System.out.println("Woman walk...");
+    }
+}
-- 
Gitee


From 583c534e8ca801f9351b787788f6787ec41a6677 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Fri, 29 Apr 2022 19:35:53 +0800
Subject: [PATCH 08/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20instanceof?=
 =?UTF-8?q?=E5=92=8C=E5=90=91=E4=B8=8B=E8=BD=AC=E5=9E=8B?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../src/main/java/com/hongyi/day16/Man.java   | 24 +++++++++++++++++
 .../main/java/com/hongyi/day16/Person.java    | 19 +++++++++++++
 .../java/com/hongyi/day16/PersonTest.java     | 27 +++++++++++++++++++
 .../src/main/java/com/hongyi/day16/Woman.java | 24 +++++++++++++++++
 .../com/hongyi/{day6 => day16}/FileTest.java  |  2 +-
 5 files changed, 95 insertions(+), 1 deletion(-)
 create mode 100644 javase/src/main/java/com/hongyi/day16/Man.java
 create mode 100644 javase/src/main/java/com/hongyi/day16/Person.java
 create mode 100644 javase/src/main/java/com/hongyi/day16/PersonTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day16/Woman.java
 rename javase/src/test/java/com/hongyi/{day6 => day16}/FileTest.java (99%)

diff --git a/javase/src/main/java/com/hongyi/day16/Man.java b/javase/src/main/java/com/hongyi/day16/Man.java
new file mode 100644
index 0000000..d2f16f2
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day16/Man.java
@@ -0,0 +1,24 @@
+package com.hongyi.day16;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 20:35
+ * @Version 1.0
+ */
+public class Man extends Person {
+    boolean isSmoking;
+
+    public void earnMoney() {
+        System.out.println("Man earn money");
+    }
+
+    @Override
+    public void eat() {
+        System.out.println("Man eat...");
+    }
+
+    @Override
+    public void walk() {
+        System.out.println("Man walk...");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day16/Person.java b/javase/src/main/java/com/hongyi/day16/Person.java
new file mode 100644
index 0000000..e1cf474
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day16/Person.java
@@ -0,0 +1,19 @@
+package com.hongyi.day16;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 20:34
+ * @Version 1.0
+ */
+public class Person {
+    String name;
+    int age;
+
+    public void eat() {
+        System.out.println("eat...");
+    }
+
+    public void walk() {
+        System.out.println("walk...");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day16/PersonTest.java b/javase/src/main/java/com/hongyi/day16/PersonTest.java
new file mode 100644
index 0000000..d020307
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day16/PersonTest.java
@@ -0,0 +1,27 @@
+package com.hongyi.day16;
+
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 20:38
+ * @Version 1.0
+ */
+public class PersonTest {
+    public static void main(String[] args) {
+        // 对象的多态：父类的引用指向子类的对象
+        Person p1 = new Man();
+        // 多态的使用：当调用父子类同名同参数的方法时，实际执行的是子类重写父类的方法--虚拟方法调用
+        p1.eat(); // Man eat...
+        p1.walk(); // Man walk...
+
+        // ------------------------------
+        // p2.earnMoney(); 不能调用Man中特有的方法
+        // p2.isSmoking = true; 不能调用Man中特有的属性
+        // 向下转型，使用强转时，可能出现ClassCastException异常
+        if (p1 instanceof Man) {
+            Man m1 = (Man) p1;
+            m1.isSmoking = true;
+            m1.earnMoney();
+        }
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day16/Woman.java b/javase/src/main/java/com/hongyi/day16/Woman.java
new file mode 100644
index 0000000..3c88eb1
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day16/Woman.java
@@ -0,0 +1,24 @@
+package com.hongyi.day16;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/28 20:36
+ * @Version 1.0
+ */
+public class Woman extends Person {
+    boolean isBeauty;
+
+    public void goShopping() {
+        System.out.println("Woman go shopping");
+    }
+
+    @Override
+    public void eat() {
+        System.out.println("Woman eat...");
+    }
+
+    @Override
+    public void walk() {
+        System.out.println("Woman walk...");
+    }
+}
diff --git a/javase/src/test/java/com/hongyi/day6/FileTest.java b/javase/src/test/java/com/hongyi/day16/FileTest.java
similarity index 99%
rename from javase/src/test/java/com/hongyi/day6/FileTest.java
rename to javase/src/test/java/com/hongyi/day16/FileTest.java
index f855d90..3cae78e 100644
--- a/javase/src/test/java/com/hongyi/day6/FileTest.java
+++ b/javase/src/test/java/com/hongyi/day16/FileTest.java
@@ -1,4 +1,4 @@
-package com.hongyi.day6;
+package com.hongyi.day16;
 
 import org.junit.Test;
 
-- 
Gitee


From a7cc1935224718a0473ce47587d6d67173675fd4 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Fri, 29 Apr 2022 20:20:54 +0800
Subject: [PATCH 09/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20Object=E7=B1=BB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/java/com/hongyi/day17/Customer.java  | 55 +++++++++++++++++++
 .../java/com/hongyi/day17/EqualsTest.java     | 38 +++++++++++++
 .../java/com/hongyi/day17/ToStringTest.java   | 16 ++++++
 3 files changed, 109 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day17/Customer.java
 create mode 100644 javase/src/main/java/com/hongyi/day17/EqualsTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day17/ToStringTest.java

diff --git a/javase/src/main/java/com/hongyi/day17/Customer.java b/javase/src/main/java/com/hongyi/day17/Customer.java
new file mode 100644
index 0000000..6c1db5c
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day17/Customer.java
@@ -0,0 +1,55 @@
+package com.hongyi.day17;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/29 19:48
+ * @Version 1.0
+ */
+public class Customer {
+    private String name;
+    private int age;
+
+    public Customer(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Customer customer = (Customer) o;
+
+        if (age != customer.age) return false;
+        return name.equals(customer.name);
+    }
+
+    @Override
+    public String toString() {
+        return "Customer{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                '}';
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day17/EqualsTest.java b/javase/src/main/java/com/hongyi/day17/EqualsTest.java
new file mode 100644
index 0000000..ea73460
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day17/EqualsTest.java
@@ -0,0 +1,38 @@
+package com.hongyi.day17;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/29 19:38
+ * @Version 1.0
+ */
+public class EqualsTest {
+    public static void main(String[] args) {
+        // 基本数据类型比较
+        int i = 10;
+        int j = 10;
+        double d = 10.0;
+        boolean b = true;
+        char c = 10;
+        System.out.println(i == j); // true
+        System.out.println(i == d); // true
+        System.out.println(i == c); // true
+        // System.out.println(b == i); // 编译出错
+        char c1 = 'A';
+        char c2 = 65;
+        System.out.println(c1 == c2); // true
+
+        // 引用数据类型比较
+        Customer customer1 = new Customer("Mark", 24);
+        Customer customer2 = new Customer("Mark", 24);
+        System.out.println(customer1 == customer2); // false
+
+        String str1 = new String("Hongyi");
+        String str2 = new String("Hongyi");
+        System.out.println(str1 == str2); // false
+
+        System.out.println(customer1.equals(customer2)); // false
+        System.out.println(str1.equals(str2)); // true，String类重写了equals方法，只比较字符串内容
+
+
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day17/ToStringTest.java b/javase/src/main/java/com/hongyi/day17/ToStringTest.java
new file mode 100644
index 0000000..c54e1d1
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day17/ToStringTest.java
@@ -0,0 +1,16 @@
+package com.hongyi.day17;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/29 20:15
+ * @Version 1.0
+ */
+public class ToStringTest {
+    public static void main(String[] args) {
+        Customer c1 = new Customer("Tom", 24);
+        System.out.println(c1); // com.hongyi.day17.Customer@5594a1b5
+
+        String str = new String("Hello World");
+        System.out.println(str);
+    }
+}
-- 
Gitee


From 1e36e5774ec9790c58778ad1fa5e772e9cc4fca3 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Fri, 29 Apr 2022 20:39:47 +0800
Subject: [PATCH 10/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E5=8C=85?=
 =?UTF-8?q?=E8=A3=85=E7=B1=BBwrapper?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../test/java/com/hongyi/day17/WrapperTest.java   | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 javase/src/test/java/com/hongyi/day17/WrapperTest.java

diff --git a/javase/src/test/java/com/hongyi/day17/WrapperTest.java b/javase/src/test/java/com/hongyi/day17/WrapperTest.java
new file mode 100644
index 0000000..e213ab8
--- /dev/null
+++ b/javase/src/test/java/com/hongyi/day17/WrapperTest.java
@@ -0,0 +1,15 @@
+package com.hongyi.day17;
+
+import org.junit.Test;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/29 20:34
+ * @Version 1.0
+ */
+public class WrapperTest {
+    @Test
+    public void test0() {
+
+    }
+}
-- 
Gitee


From 3f4da2acfdcffae4e679e7dcd1ce4618bce7b0fd Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sat, 30 Apr 2022 11:11:06 +0800
Subject: [PATCH 11/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20static=E5=85=B3?=
 =?UTF-8?q?=E9=94=AE=E5=AD=97=20=E9=9D=99=E6=80=81=E5=B1=9E=E6=80=A7=20?=
 =?UTF-8?q?=E9=9D=99=E6=80=81=E6=96=B9=E6=B3=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/hongyi/day18/StaticTest.java     | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day18/StaticTest.java

diff --git a/javase/src/main/java/com/hongyi/day18/StaticTest.java b/javase/src/main/java/com/hongyi/day18/StaticTest.java
new file mode 100644
index 0000000..2732ee6
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day18/StaticTest.java
@@ -0,0 +1,33 @@
+package com.hongyi.day18;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/30 10:33
+ * @Version 1.0
+ */
+public class StaticTest {
+    public static void main(String[] args) {
+        Chinese.show();
+    }
+}
+
+// 中国人
+class Chinese {
+    String name;
+    int age;
+    // 类变量
+    static String nation;
+
+    public void eat() {
+        System.out.println("eat...");
+    }
+
+    // 静态方法
+    public static void show() {
+        // this.age = 24; 非法
+        // eat(); 非法
+        System.out.println(nation);
+        System.out.println("show...");
+    }
+}
+
-- 
Gitee


From ea3cb371894b85980d2a61b1b71ea7327414203b Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sat, 30 Apr 2022 22:46:47 +0800
Subject: [PATCH 12/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E5=8D=95?=
 =?UTF-8?q?=E4=BE=8B=E8=AE=BE=E8=AE=A1=E6=A8=A1=E5=BC=8F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/hongyi/day18/SingletonTest1.java | 31 ++++++++++++++++++
 .../java/com/hongyi/day18/SingletonTest2.java | 32 +++++++++++++++++++
 2 files changed, 63 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day18/SingletonTest1.java
 create mode 100644 javase/src/main/java/com/hongyi/day18/SingletonTest2.java

diff --git a/javase/src/main/java/com/hongyi/day18/SingletonTest1.java b/javase/src/main/java/com/hongyi/day18/SingletonTest1.java
new file mode 100644
index 0000000..7978522
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day18/SingletonTest1.java
@@ -0,0 +1,31 @@
+package com.hongyi.day18;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/30 11:11
+ * @Version 1.0
+ */
+public class SingletonTest1 {
+    public static void main(String[] args) {
+        Bank bank1 = Bank.getInstance();
+        Bank bank2 = Bank.getInstance();
+        System.out.println(bank1 == bank2); // true
+
+    }
+}
+
+// 饿汉式
+class Bank {
+    // 2.内部创建类的对象
+    private static final Bank instance = new Bank();
+
+    // 1.私有化构造器
+    private Bank() {
+
+    }
+
+    // 3.提供公共的方法返回类的对象
+    public static Bank getInstance() {
+        return instance;
+    }
+}
\ No newline at end of file
diff --git a/javase/src/main/java/com/hongyi/day18/SingletonTest2.java b/javase/src/main/java/com/hongyi/day18/SingletonTest2.java
new file mode 100644
index 0000000..1fd3ac9
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day18/SingletonTest2.java
@@ -0,0 +1,32 @@
+package com.hongyi.day18;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/30 11:16
+ * @Version 1.0
+ */
+public class SingletonTest2 {
+    public static void main(String[] args) {
+        Order order1 = Order.getInstance();
+        Order order2 = Order.getInstance();
+        System.out.println(order1 == order2); // true
+    }
+}
+
+class Order {
+    // 1.私有化构造器
+    private Order() {
+
+    }
+
+    // 2.声明当前类对象，没有初始化
+    private static Order instance = null;
+
+    // 3.返回该对象
+    public static Order getInstance() {
+        if (instance == null) {
+            instance = new Order();
+        }
+        return instance;
+    }
+}
-- 
Gitee


From 7d6f4baae2bef89d9f966a88e715db4a7acbfd36 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sat, 30 Apr 2022 23:08:18 +0800
Subject: [PATCH 13/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E7=90=86?=
 =?UTF-8?q?=E8=A7=A3main=E6=96=B9=E6=B3=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/java/com/hongyi/day18/MainDemo.java  | 14 +++++++++++++
 .../main/java/com/hongyi/day18/MainTest.java  | 20 +++++++++++++++++++
 2 files changed, 34 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day18/MainDemo.java
 create mode 100644 javase/src/main/java/com/hongyi/day18/MainTest.java

diff --git a/javase/src/main/java/com/hongyi/day18/MainDemo.java b/javase/src/main/java/com/hongyi/day18/MainDemo.java
new file mode 100644
index 0000000..244e024
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day18/MainDemo.java
@@ -0,0 +1,14 @@
+package com.hongyi.day18;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/30 23:01
+ * @Version 1.0
+ */
+public class MainDemo {
+    public static void main(String[] args) {
+        for (String arg : args) {
+            System.out.println(arg);
+        }
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day18/MainTest.java b/javase/src/main/java/com/hongyi/day18/MainTest.java
new file mode 100644
index 0000000..5abb35e
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day18/MainTest.java
@@ -0,0 +1,20 @@
+package com.hongyi.day18;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/4/30 22:47
+ * @Version 1.0
+ */
+public class MainTest {
+
+    public static void main(String[] args) { // 程序的入口
+        // show(); 报错，因为show不是静态方法
+        // 通过类的实例来调非静态方法
+        MainTest test = new MainTest();
+        test.show();
+    }
+
+    public void show() {
+        System.out.println("show...");
+    }
+}
-- 
Gitee


From e0c16b289547724576ad44c0d45745144765b1d1 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sun, 1 May 2022 09:37:46 +0800
Subject: [PATCH 14/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E4=BB=A3?=
 =?UTF-8?q?=E7=A0=81=E5=9D=97?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/java/com/hongyi/day19/BlockTest.java | 74 +++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day19/BlockTest.java

diff --git a/javase/src/main/java/com/hongyi/day19/BlockTest.java b/javase/src/main/java/com/hongyi/day19/BlockTest.java
new file mode 100644
index 0000000..5ded9d1
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day19/BlockTest.java
@@ -0,0 +1,74 @@
+package com.hongyi.day19;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/1 9:16
+ * @Version 1.0
+ */
+public class BlockTest {
+    public static void main(String[] args) {
+        System.out.println(Person.desc);
+
+        Person p1 = new Person();
+        System.out.println(p1);
+    }
+}
+
+class Person {
+    String name;
+    int age;
+    static String desc = "I'm a human";
+
+    public Person() {
+
+    }
+
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    // 静态代码块
+    static {
+        System.out.println("static block-1...");
+        desc = "I'm a human..."; // 重新对desc赋值
+    }
+
+    static {
+        System.out.println("static block-2...");
+        // 只能调用静态方法
+        info();
+    }
+
+    // 非静态代码块
+    {
+        // 创建对象时可以初始化属性
+        this.name = "Mark";
+        this.age = 24;
+        System.out.println("nonstatic block...");
+    }
+
+    {
+        System.out.println("nonstatic block-2...");
+        // 调用静态方法
+        info();
+        // 调用非静态方法
+        eat();
+    }
+
+    public void eat() {
+        System.out.println("eat...");
+    }
+
+    @Override
+    public String toString() {
+        return "Person{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                '}';
+    }
+
+    public static void info() {
+        System.out.println("info...");
+    }
+}
-- 
Gitee


From 8b552bcc4b9254f7ef2b980f26313ae70197c36b Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sun, 1 May 2022 10:00:28 +0800
Subject: [PATCH 15/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20final=E5=85=B3?=
 =?UTF-8?q?=E9=94=AE=E5=AD=97?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/java/com/hongyi/day19/FinalTest.java | 25 ++++++++++++++++
 .../java/com/hongyi/day19/FinalTest1.java     | 29 +++++++++++++++++++
 .../java/com/hongyi/day19/FinalTest2.java     | 24 +++++++++++++++
 3 files changed, 78 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day19/FinalTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day19/FinalTest1.java
 create mode 100644 javase/src/main/java/com/hongyi/day19/FinalTest2.java

diff --git a/javase/src/main/java/com/hongyi/day19/FinalTest.java b/javase/src/main/java/com/hongyi/day19/FinalTest.java
new file mode 100644
index 0000000..0226231
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day19/FinalTest.java
@@ -0,0 +1,25 @@
+package com.hongyi.day19;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/1 9:38
+ * @Version 1.0
+ */
+public class FinalTest {
+    public static void main(String[] args) {
+
+    }
+}
+
+class A {
+    public final void show() {
+
+    }
+}
+
+class B extends A {
+    // 不能重写final方法
+//    public void show() {
+//
+//    }
+}
\ No newline at end of file
diff --git a/javase/src/main/java/com/hongyi/day19/FinalTest1.java b/javase/src/main/java/com/hongyi/day19/FinalTest1.java
new file mode 100644
index 0000000..f43741d
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day19/FinalTest1.java
@@ -0,0 +1,29 @@
+package com.hongyi.day19;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/1 9:44
+ * @Version 1.0
+ */
+public class FinalTest1 {
+
+    final int WIDTH = 10; // 显式初始化
+    final int LEFT;
+    final int RIGHT;
+
+    public FinalTest1() {
+        RIGHT = 10; // 构造器初始化
+    }
+
+    public void doWidth() {
+        // WIDTH = 20; 报错，不能修改final修饰的变量
+    }
+
+    {
+        LEFT = 10; // 代码块初始化
+    }
+
+    public static void main(String[] args) {
+
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day19/FinalTest2.java b/javase/src/main/java/com/hongyi/day19/FinalTest2.java
new file mode 100644
index 0000000..a60a3fa
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day19/FinalTest2.java
@@ -0,0 +1,24 @@
+package com.hongyi.day19;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/1 9:54
+ * @Version 1.0
+ */
+public class FinalTest2 {
+
+    public void show() {
+        final int NUM = 10; // 修饰常量
+        // NUM += 10; 编译不通过
+    }
+
+    public void show(final int num) { // 修饰形参
+        // num += 10; 编译不用过
+        System.out.println(num);
+    }
+
+    public static void main(String[] args) {
+        FinalTest2 test = new FinalTest2();
+        test.show(10);
+    }
+}
-- 
Gitee


From d1c6319ddc52d5c3201105a31a72d39103655085 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sun, 1 May 2022 10:44:43 +0800
Subject: [PATCH 16/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E6=8A=BD?=
 =?UTF-8?q?=E8=B1=A1=E7=B1=BB=E5=92=8C=E6=8A=BD=E8=B1=A1=E6=96=B9=E6=B3=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/hongyi/day20/AbstractTest.java   | 27 +++++++++++
 .../main/java/com/hongyi/day20/HumanTest.java | 37 +++++++++++++++
 .../java/com/hongyi/day20/TemplateTest.java   | 46 +++++++++++++++++++
 3 files changed, 110 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day20/AbstractTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day20/HumanTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day20/TemplateTest.java

diff --git a/javase/src/main/java/com/hongyi/day20/AbstractTest.java b/javase/src/main/java/com/hongyi/day20/AbstractTest.java
new file mode 100644
index 0000000..d595a4d
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day20/AbstractTest.java
@@ -0,0 +1,27 @@
+package com.hongyi.day20;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/1 10:07
+ * @Version 1.0
+ */
+public class AbstractTest {
+    public static void main(String[] args) {
+        Student s = new Student();
+        s.eat();
+    }
+}
+
+// 抽象类
+abstract class Person {
+    // 抽象方法
+    public abstract void eat();
+}
+
+class Student extends Person {
+
+    @Override
+    public void eat() {
+        System.out.println("Student eat...");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day20/HumanTest.java b/javase/src/main/java/com/hongyi/day20/HumanTest.java
new file mode 100644
index 0000000..784a0de
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day20/HumanTest.java
@@ -0,0 +1,37 @@
+package com.hongyi.day20;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/1 10:24
+ * @Version 1.0
+ */
+public class HumanTest {
+    public static void main(String[] args) {
+        // 抽象类的匿名子类对象human
+        Human human = new Human() {
+            // 对抽象方法的重写
+            @Override
+            public void eat() {
+                System.out.println("eat");
+            }
+
+            @Override
+            public void breath() {
+                System.out.println("breath...");
+            }
+        };
+
+        human.eat();
+        human.breath();
+    }
+}
+
+// 抽象类
+abstract class Human {
+
+    abstract public void eat();
+
+    abstract public void breath();
+}
+
+
diff --git a/javase/src/main/java/com/hongyi/day20/TemplateTest.java b/javase/src/main/java/com/hongyi/day20/TemplateTest.java
new file mode 100644
index 0000000..b0df027
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day20/TemplateTest.java
@@ -0,0 +1,46 @@
+package com.hongyi.day20;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/1 10:38
+ * @Version 1.0
+ */
+public class TemplateTest {
+    public static void main(String[] args) {
+        Template t = new SubTemplate();
+        t.spendTime();
+    }
+}
+
+abstract class Template {
+    // 计算某段代码所花费的时间
+    public void spendTime() {
+        long start = System.currentTimeMillis();
+        code(); // 不确定的部分
+        long end = System.currentTimeMillis();
+        System.out.println("花费的时间为: " + (end - start));
+
+    }
+
+    public abstract void code();
+}
+
+class SubTemplate extends Template {
+
+    // 找1000以内的质数
+    @Override
+    public void code() {
+        for (int i = 2; i < 1000; i++) {
+            boolean flag = true;
+            for (int j = 2; j <= Math.sqrt(i); j++) {
+                if (i % j == 0) {
+                    flag = false;
+                    break;
+                }
+            }
+            if (flag) {
+                System.out.println(i);
+            }
+        }
+    }
+}
-- 
Gitee


From 0c8ec6ae182b5facdffb64962866a1bc6b0b2401 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sun, 1 May 2022 22:17:03 +0800
Subject: [PATCH 17/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E6=8E=A5?=
 =?UTF-8?q?=E5=8F=A3=E6=A6=82=E5=BF=B5=E5=92=8C=E4=BD=BF=E7=94=A8?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/hongyi/day21/InterfaceTest.java  | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day21/InterfaceTest.java

diff --git a/javase/src/main/java/com/hongyi/day21/InterfaceTest.java b/javase/src/main/java/com/hongyi/day21/InterfaceTest.java
new file mode 100644
index 0000000..445be56
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day21/InterfaceTest.java
@@ -0,0 +1,50 @@
+package com.hongyi.day21;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/1 16:58
+ * @Version 1.0
+ */
+public class InterfaceTest {
+    public static void main(String[] args) {
+        System.out.println(Flyable.MAX_SPEED);
+        System.out.println(Flyable.MIN_SPEED);
+
+        Plane plane = new Plane();
+        plane.fly();
+        plane.stop();
+    }
+}
+
+interface Attack {
+    void attack();
+}
+
+interface Flyable {
+    // 全局常量
+    int MAX_SPEED = 7000;
+    int MIN_SPEED = 1;
+
+    // 抽象方法
+    void fly();
+    void stop();
+}
+
+// 先extends后implements
+class Plane extends Object implements Flyable, Attack {
+
+    @Override
+    public void fly() {
+        System.out.println("Plane fly...");
+    }
+
+    @Override
+    public void stop() {
+        System.out.println("Plane stop...");
+    }
+
+    @Override
+    public void attack() {
+        System.out.println("Plane attack...");
+    }
+}
-- 
Gitee


From 066f77a81831b9fb018e7e3f2d5cbb5a21d0e8d3 Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sun, 15 May 2022 16:25:17 +0800
Subject: [PATCH 18/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E6=8E=A5?=
 =?UTF-8?q?=E5=8F=A3=E6=96=B0=E7=89=B9=E6=80=A7?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/java/com/hongyi/day22/CompareA.java  | 21 +++++
 .../java/com/hongyi/day22/NetworkTest.java    | 48 +++++++++++
 .../java/com/hongyi/day22/SubClassTest.java   | 25 ++++++
 .../main/java/com/hongyi/day22/USBTest.java   | 86 +++++++++++++++++++
 4 files changed, 180 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day22/CompareA.java
 create mode 100644 javase/src/main/java/com/hongyi/day22/NetworkTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day22/SubClassTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day22/USBTest.java

diff --git a/javase/src/main/java/com/hongyi/day22/CompareA.java b/javase/src/main/java/com/hongyi/day22/CompareA.java
new file mode 100644
index 0000000..bcaaa6e
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day22/CompareA.java
@@ -0,0 +1,21 @@
+package com.hongyi.day22;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/15 16:13
+ * @Version 1.0
+ */
+public interface CompareA {
+    static void method1() {
+        System.out.println("CompareA:static method");
+    }
+
+    // 默认方法
+    default void method2() {
+        System.out.println("CompareA:default method");
+    }
+
+    default void method3() {
+        System.out.println("CompareA:default method");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day22/NetworkTest.java b/javase/src/main/java/com/hongyi/day22/NetworkTest.java
new file mode 100644
index 0000000..1bf4d01
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day22/NetworkTest.java
@@ -0,0 +1,48 @@
+package com.hongyi.day22;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/15 16:04
+ * @Version 1.0
+ */
+public class NetworkTest {
+    public static void main(String[] args) {
+        Server server = new Server();
+        ProxyServer proxyServer = new ProxyServer(server);
+        proxyServer.browse();
+    }
+}
+
+interface Network {
+    public void browse();
+}
+
+// 被代理类
+class Server implements Network {
+
+    @Override
+    public void browse() {
+        System.out.println("真实的服务器访问网络");
+    }
+}
+
+// 代理类
+class ProxyServer implements Network {
+
+    private Network network;
+
+    public ProxyServer(Network network) {
+        this.network = network;
+    }
+
+    public void check() {
+        System.out.println("联网前的检查工作");
+    }
+
+    @Override
+    public void browse() {
+        check();
+        network.browse();
+    }
+}
+
diff --git a/javase/src/main/java/com/hongyi/day22/SubClassTest.java b/javase/src/main/java/com/hongyi/day22/SubClassTest.java
new file mode 100644
index 0000000..f85069d
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day22/SubClassTest.java
@@ -0,0 +1,25 @@
+package com.hongyi.day22;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/15 16:15
+ * @Version 1.0
+ */
+public class SubClassTest {
+    public static void main(String[] args) {
+        Subclass subclass = new Subclass();
+        // 调用默认方法
+        subclass.method2();
+        subclass.method3();
+
+        // 调用静态方法
+        CompareA.method1();
+    }
+}
+
+class Subclass implements CompareA {
+    // 重写接口的默认方法
+    public void method3() {
+        System.out.println("Subclass:method3");
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day22/USBTest.java b/javase/src/main/java/com/hongyi/day22/USBTest.java
new file mode 100644
index 0000000..bd8399c
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day22/USBTest.java
@@ -0,0 +1,86 @@
+package com.hongyi.day22;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/15 15:50
+ * @Version 1.0
+ */
+public class USBTest {
+    public static void main(String[] args) {
+        Computer computer = new Computer();
+        // 1.创建了接口的非匿名实现类的非匿名对象
+        Flash flash = new Flash();
+        computer.transferData(flash); // 接口的多态性 USB usb = new Flash();
+
+        // 2.接口的非匿名实现类的匿名对象
+        computer.transferData(new Flash());
+
+        // 3.接口的匿名实现类的非匿名对象
+        USB phone = new USB() {
+            @Override
+            public void start() {
+                System.out.println("手机开始工作");
+            }
+
+            @Override
+            public void stop() {
+                System.out.println("手机结束工作");
+            }
+        };
+
+        computer.transferData(phone);
+
+        // 4.接口的匿名实现类的匿名对象
+        computer.transferData(new USB() {
+
+            @Override
+            public void start() {
+                System.out.println("mp3开始工作");
+            }
+
+            @Override
+            public void stop() {
+                System.out.println("mp3结束工作");
+            }
+        });
+    }
+}
+
+class Computer {
+    public void transferData(USB usb) {
+        usb.start();
+        System.out.println("具体的传输数据的细节");
+        usb.stop();
+    }
+}
+
+interface USB {
+    void start();
+
+    void stop();
+}
+
+class Flash implements USB {
+    @Override
+    public void start() {
+        System.out.println("U盘开始工作");
+    }
+
+    @Override
+    public void stop() {
+        System.out.println("U盘结束工作");
+    }
+}
+
+class Printer implements USB {
+
+    @Override
+    public void start() {
+        System.out.println("打印机开始工作");
+    }
+
+    @Override
+    public void stop() {
+        System.out.println("打印机结束工作");
+    }
+}
\ No newline at end of file
-- 
Gitee


From a7a9eda97dde5c921a968c033d9dc7ea8554d80a Mon Sep 17 00:00:00 2001
From: zenghongyi <277382367@qq.com>
Date: Sun, 15 May 2022 17:14:52 +0800
Subject: [PATCH 19/19] =?UTF-8?q?java=E5=9F=BA=E7=A1=80=20=E5=86=85?=
 =?UTF-8?q?=E9=83=A8=E7=B1=BB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/hongyi/day23/InnerClassTest.java | 63 +++++++++++++++++++
 .../com/hongyi/day23/InnerClassTest1.java     | 12 ++++
 2 files changed, 75 insertions(+)
 create mode 100644 javase/src/main/java/com/hongyi/day23/InnerClassTest.java
 create mode 100644 javase/src/main/java/com/hongyi/day23/InnerClassTest1.java

diff --git a/javase/src/main/java/com/hongyi/day23/InnerClassTest.java b/javase/src/main/java/com/hongyi/day23/InnerClassTest.java
new file mode 100644
index 0000000..ae0169a
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day23/InnerClassTest.java
@@ -0,0 +1,63 @@
+package com.hongyi.day23;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/15 16:39
+ * @Version 1.0
+ */
+public class InnerClassTest {
+    public static void main(String[] args) {
+        // 创建Dog的实例
+        Person.Dog dog = new Person.Dog();
+        dog.run();
+
+        // 创建Bird的实例
+        Person person = new Person();
+        Person.Bird bird = person.new Bird();
+        bird.sing();
+        bird.display("Hongyi");
+    }
+}
+
+class Person {
+
+    String name = "Mark";
+    int age;
+
+    public void eat() {
+        System.out.println("Person eat");
+    }
+
+    // 静态成员内部类，只能调用外部静态的结构
+    static class Dog {
+        String name;
+        public Dog() {
+
+        }
+        public void run() {
+            System.out.println("Dog run");
+        }
+    }
+
+    // 非静态成员内部类
+    class Bird {
+        String name = "bird";
+        public Bird() {
+
+        }
+        public void sing() {
+            System.out.println("Bird sing");
+            Person.this.eat(); // 调用外部类的属性（完整格式）
+            // eat();
+        }
+
+        public void display(String name) {
+            // 方法的形参
+            System.out.println(name);
+            // 调用自己的属性
+            System.out.println(this.name);
+            // 外部类的属性
+            System.out.println(Person.this.name);
+        }
+    }
+}
diff --git a/javase/src/main/java/com/hongyi/day23/InnerClassTest1.java b/javase/src/main/java/com/hongyi/day23/InnerClassTest1.java
new file mode 100644
index 0000000..65528ba
--- /dev/null
+++ b/javase/src/main/java/com/hongyi/day23/InnerClassTest1.java
@@ -0,0 +1,12 @@
+package com.hongyi.day23;
+
+/**
+ * @Author Kisugi Takumi
+ * @Date 2022/5/15 17:10
+ * @Version 1.0
+ */
+public class InnerClassTest1 {
+    public static void main(String[] args) {
+
+    }
+}
-- 
Gitee