diff --git "a/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/HelloWorld.java" "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/HelloWorld.java"
new file mode 100644
index 0000000000000000000000000000000000000000..fb0e21b9b81a1b6ad01b74ec05a15f102d82923d
--- /dev/null
+++ "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/HelloWorld.java"
@@ -0,0 +1,10 @@
+package qwce;
+
+public class HelloWorld {
+ public static void main(String[] args){
+ System.out.println("蔡东生");
+ System.out.println("18");
+}
+
+}
+
\ No newline at end of file
diff --git "a/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Shudian.java" "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Shudian.java"
new file mode 100644
index 0000000000000000000000000000000000000000..439e7ba80a7ec07772ee060188596bd87a7ff9b7
--- /dev/null
+++ "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Shudian.java"
@@ -0,0 +1,15 @@
+package qwce;
+
+public class Shudian {
+ public static void main(String[] args){
+ System.out.println("书店管理销售系统》客户信息系统");
+ System.out.println("");
+ System.out.println("*********************************");
+ System.out.println(" 1.显示所有客户信息");
+ System.out.println(" 2.添加客户信息");
+ System.out.println(" 3.修改所有客户信息");
+ System.out.println("*********************************");
+ System.out.println("请选择，输入数字或按“n”返回上一级菜单");
+
+ }
+}
diff --git "a/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Xingminglianl.java" "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Xingminglianl.java"
new file mode 100644
index 0000000000000000000000000000000000000000..0678bddaa2748624d0167140559dce8a836a618c
--- /dev/null
+++ "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Xingminglianl.java"
@@ -0,0 +1,35 @@
+package lesson2;
+
+import java.util.Scanner;
+
+import javax.swing.text.html.CSS;
+
+public class Xingminglianl {
+
+ public static void main(String[] args) {
+ // TODO Auto-generated method stub
+ Scanner scanner=new Scanner(System.in);
+ System.out.println("请输入你的姓名");
+ String name =scanner.next();
+
+ System.out.println("请输入你的年龄");
+ int age =scanner.nextInt();
+
+ System.out.println("请输入你的性别");
+ String xingbie=scanner.next();
+
+ System.out.println("请输入你的学号");
+ int xuehao =scanner.nextInt();
+
+ System.out.println("请输入你的HTML成绩");
+ int chengji =scanner.nextInt();
+
+ System.out.println("信息如下");
+ System.out.println("你的名字是;"+name);
+ System.out.println("你的年龄是;"+age);
+ System.out.println("你的性别是;"+xingbie);
+ System.out.println("你的学号是;"+xuehao);
+ System.out.println("你的HTML成绩是;"+chengji);
+ }
+
+}
diff --git "a/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Yx.java" "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Yx.java"
new file mode 100644
index 0000000000000000000000000000000000000000..180e4c49edad4a1499376399eacfd55c4e928252
--- /dev/null
+++ "b/Java\347\254\254\344\270\200\344\272\214\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Yx.java"
@@ -0,0 +1,58 @@
+package lesson2;
+
+import java.util.Scanner;
+
+public class Yx {
+
+ public static void main(String[] args) {
+ /*编写程序，定义变量，分别存放游戏中某个英雄的属性信息，
+包括：人物角色名（roleName）、生命值（health）、攻击力（damage）、防御力（defense）、武器加成（weaponScaling）、是否是热门英雄（isHot）。
+打印出来。
+
+这些属性的信息由用户输入。
+
+ *
+ */
+ // TODO Auto-generated method stub
+ Scanner scanner=new Scanner(System.in);
+
+ System.out.println("请输入人物角色名");
+ String roleName= scanner.next();
+
+ System.out.println("请输入生命值");
+ long health= scanner.nextLong();
+
+ System.out.println("请输入攻击力");
+ int damage = scanner.nextInt();
+
+ System.out.println("请输入防御力");
+ int defense= scanner.nextInt();
+
+ System.out.println("请输入武器加成");
+ float weaponScaling= scanner.nextFloat();
+
+ System.out.println("请输入是否是热门英雄");
+ boolean isHot = scanner.nextBoolean();
+
+ System.out.println("英雄的信息如下：");
+
+ System.out.println("人物角色名"+roleName);
+
+ System.out.println("生命值"+health);
+
+ System.out.println("攻击力"+damage);
+
+ System.out.println("防御力"+defense);
+
+ System.out.println("武器加成"+weaponScaling);
+
+ System.out.println("是否是热门英雄"+isHot);
+
+
+
+
+
+
+ }
+
+}
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/.classpath" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/.classpath"
new file mode 100644
index 0000000000000000000000000000000000000000..51a8bbad89682d379e0aadb7bd54d22de601a62f
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/.classpath"
@@ -0,0 +1,6 @@
+
+
+
+
+
+
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/.project" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/.project"
new file mode 100644
index 0000000000000000000000000000000000000000..18347c2281f42b1980f707ecb83489107511aca5
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/.project"
@@ -0,0 +1,17 @@
+
+
+ less_1
+
+
+
+
+
+ org.eclipse.jdt.core.javabuilder
+
+
+
+
+
+ org.eclipse.jdt.core.javanature
+
+
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/.settings/org.eclipse.jdt.core.prefs" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/.settings/org.eclipse.jdt.core.prefs"
new file mode 100644
index 0000000000000000000000000000000000000000..3a21537071bf4118b9e1ee864cb4bc258aa48211
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/.settings/org.eclipse.jdt.core.prefs"
@@ -0,0 +1,11 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/Less_4zuoy.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/Less_4zuoy.class"
new file mode 100644
index 0000000000000000000000000000000000000000..f73e246c14009f4cf4cd3dbcde3ed8bbf5ffdc63
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/Less_4zuoy.class" differ
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/lees_2zuoy.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/lees_2zuoy.class"
new file mode 100644
index 0000000000000000000000000000000000000000..15a5df2637465bad92775ea66a74c45426696734
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/lees_2zuoy.class" differ
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/less_1zuoy.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/less_1zuoy.class"
new file mode 100644
index 0000000000000000000000000000000000000000..7e81de18bbffa1c626ae77cfc62093a94fbba8af
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/less_1zuoy.class" differ
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/less_3.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/less_3.class"
new file mode 100644
index 0000000000000000000000000000000000000000..dfe5759f6bc5343870effa6c7ecffe8a2ef43bf4
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/bin/com/cd/less_1/less_3.class" differ
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Lees_2zuoy.java" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Lees_2zuoy.java"
new file mode 100644
index 0000000000000000000000000000000000000000..ab0e7e2fed72f24b7d5776ad6be34f4318550cb2
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Lees_2zuoy.java"
@@ -0,0 +1,27 @@
+package com.cd.less_1;
+
+import java.util.Scanner;
+
+public class lees_2zuoy {
+ public static void main(String[] args) {
+
+ int num1;
+ int num2;
+ int num3;
+ Scanner scan = new Scanner(System.in);
+ System.out.println("请输入一个值：");
+ num1=scan.nextInt();
+ System.out.println("请再输入一个值：");
+ num2=scan.nextInt();
+ System.out.println("您输入的两个数值是:");
+ System.out.println("num1的数值是"+num1);
+ System.out.println("num2的数值是"+num2);
+
+ num3=num1;
+ num1=num2;
+ num2=num3;
+ System.out.println("\n互换后的数值是:：");
+ System.out.println("num1的数值是"+num1);
+ System.out.println("num2的数值是"+num2);
+ }
+}
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Less_1zuoy.java" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Less_1zuoy.java"
new file mode 100644
index 0000000000000000000000000000000000000000..d04bc308d954e46e95829c43667f70d335bd98b2
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Less_1zuoy.java"
@@ -0,0 +1,22 @@
+package com.cd.less_1;
+
+import java.util.Scanner;
+
+public class less_1zuoy {
+
+ public static void main(String[] args) {
+ System.out.println(Byte.MAX_VALUE);
+ System.out.println(Short.MAX_VALUE);
+ System.out.println(Integer.MAX_VALUE);
+ System.out.println(Long.MAX_VALUE);
+ System.out.println(Float.MAX_VALUE);
+ System.out.println(Double.MAX_VALUE);
+
+ System.out.println(Byte.MIN_VALUE);
+ System.out.println(Short.MIN_VALUE);
+ System.out.println(Integer.MIN_VALUE);
+ System.out.println(Long.MIN_VALUE);
+ System.out.println(Float.MIN_VALUE);
+ System.out.println(Double.MIN_VALUE);
+ }
+}
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Less_3.java" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Less_3.java"
new file mode 100644
index 0000000000000000000000000000000000000000..34a4b3b1d4168caa370f8bb35dd6945ac96b8aef
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Less_3.java"
@@ -0,0 +1,23 @@
+package com.cd.less_1;
+
+import java.util.Scanner;
+
+public class less_3 {
+ public static void main(String[] args) {
+ int num1;
+ float num2;
+ double num3;
+ double sum4;
+ Scanner scan = new Scanner(System.in);
+
+ num1=scan.nextInt();
+
+ num2=scan.nextFloat();
+
+ num3=scan.nextDouble();
+
+ sum4 = num1+num2+num3;
+ System.out.print("相加的总值是"+sum4);
+
+ }
+}
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Less_4zuoy.java" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Less_4zuoy.java"
new file mode 100644
index 0000000000000000000000000000000000000000..536a3f4bae795d9d4e0c3f87ef8a2acfa3477d54
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1/src/com/cd/less_1/Less_4zuoy.java"
@@ -0,0 +1,22 @@
+package com.cd.less_1;
+
+import java.util.Scanner;
+
+public class Less_4zuoy {
+ public static void main(String[] args) {
+ int num1;
+ float num2;
+ double num3;
+ byte num4;
+
+ Scanner scan = new Scanner(System.in);
+ System.out.println("请输入一个double数据");
+ num3 = scan.nextDouble();
+ num1 = (int)num3;
+ num2 = (float)num3;
+ num4 = (byte)num3;
+
+ double sum = num1+num2+num4;
+ System.out.println("强制转换的总和是"+sum);
+ }
+}
diff --git "a/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1.java" "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1.java"
new file mode 100644
index 0000000000000000000000000000000000000000..47ed4b174df6786fd2e54c45dfb294b2ded13b92
--- /dev/null
+++ "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_1.java"
@@ -0,0 +1,26 @@
+package com.cd.less1;
+
+import java.util.Scanner;
+
+public class Less_1 {
+
+ public static void main(String[] args) {
+
+ int num1;
+ int num2;
+ int sum;
+
+
+ Scanner scan = new Scanner(System.in);
+ System.out.println("请输入一个值");
+ num1= scan.nextInt();
+ System.out.println("请输入第二个值");
+ num2 = scan.nextInt();
+ System.out.println("num1 - num2的值差是" + (num1 - num2) );
+ System.out.println("num1 * num2的值是" + (num1 * num2) );
+ System.out.println("num1 / num2的值是" + (num1 /(float)num2) );
+ System.out.println("num1 + num2的值差是" + (num1 + num2) );
+ System.out.println("num1 % num2的值差是" + (num1 % num2) );
+ }
+
+}
diff --git "a/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_2.java" "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_2.java"
new file mode 100644
index 0000000000000000000000000000000000000000..ef9957fddbe83d2c2337e77e509c85170e62f1e4
--- /dev/null
+++ "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_2.java"
@@ -0,0 +1,27 @@
+package com.cd.less1;
+
+import java.util.Scanner;
+
+public class Less_2 {
+
+ public static void main(String[] args) {
+
+ int num1=10;
+ num1 +=5;
+ System.out.println(num1);
+ num1 /=3;
+ System.out.println(num1);
+ num1 -=3;
+ System.out.println(num1);
+ num1 %=3;
+ System.out.println(num1);
+ num1 *=3;
+
+
+
+ Scanner scan = new Scanner(System.in);
+
+
+ }
+
+}
\ No newline at end of file
diff --git "a/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_3.java" "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_3.java"
new file mode 100644
index 0000000000000000000000000000000000000000..65e1d9439ca4e40c8e1058d2313fe30c3f3f9ad8
--- /dev/null
+++ "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_3.java"
@@ -0,0 +1,15 @@
+package com.cd.less1;
+
+public class Less_3 {
+ public static void main(String[] args) {
+ int num1=20;
+ num1 ++;
+ System.out.println(num1);
+ ++num1;
+ System.out.println(num1);
+ num1 --;
+ System.out.println(num1);
+ --num1;
+ System.out.println(num1);
+ }
+}
diff --git "a/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_4.java" "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_4.java"
new file mode 100644
index 0000000000000000000000000000000000000000..72b39657fb7d28d9266358213b189dceb143b079
--- /dev/null
+++ "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_4.java"
@@ -0,0 +1,15 @@
+package com.cd.less1;
+
+import java.util.Scanner;
+
+public class Less_4 {
+ public static void main(String[] args) {
+ double num1=3.14;
+ int num2;
+
+ Scanner scan = new Scanner(System.in);
+ System.out.println("请输入半径R值：");
+ num2= scan.nextInt();
+ System.out.println("圆的面积：" + num1*(float)num2 * num2);
+ }
+}
diff --git "a/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_5.java" "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_5.java"
new file mode 100644
index 0000000000000000000000000000000000000000..595053c160f67e7fc104c3316d88edc6a7582805
--- /dev/null
+++ "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_5.java"
@@ -0,0 +1,16 @@
+package com.cd.less1;
+
+import java.util.Scanner;
+
+public class Less_5 {
+ public static void main(String[] args) {
+ int sum;
+ Scanner scan = new Scanner(System.in);
+ System.out.println("请输入一个四位数");
+ sum=scan.nextInt();
+ System.out.println("千位数是"+sum/1000);
+ System.out.println("百位数是"+sum/100%10);
+ System.out.println("十位数是"+sum/10%100%10);
+ System.out.println("个位数是"+sum%10);
+ }
+}
diff --git "a/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_6.java" "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_6.java"
new file mode 100644
index 0000000000000000000000000000000000000000..5beef0e2be25bf60a13412b29a3c1b1c48ed4052
--- /dev/null
+++ "b/Java\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232/\346\270\251\345\271\277\347\224\237/Less_6.java"
@@ -0,0 +1,15 @@
+package com.cd.less1;
+
+import java.util.Scanner;
+
+public class Less_6 {
+ public static void main(String[] args) {
+ double num1;
+ double num2;
+ Scanner scan = new Scanner(System.in);
+ System.out.println("请输入一个华氏温度");
+ num1=scan.nextDouble();
+ System.out.println(num2 = 5 / (float)9 * ( num1 -32 ));
+
+ }
+}