diff --git "a/## \346\216\245\345\217\243\351\242\230\347\233\2562.md" "b/## \346\216\245\345\217\243\351\242\230\347\233\2562.md"
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+## 接口题目2
+
+1. 请定义“员工(类)”：
+   属性：姓名、性别、年龄(全部私有)
+   行为：工作(抽象)
+   无参、全参构造方法
+   get/set方法
+
+2. 请定义“绘画(接口)”
+   抽象方法：绘画
+3. 请定义“Java讲师类”继承自“员工类”
+4. 请定义”UI讲师类”，继承自“员工类”，并实现“绘画”接口。
+
+**要求**：
+
+1. 请按上述要求设计出类结构，并实现相关的方法。
+2. 测试类中创建对象测试，属性可自定义：
+   - 创建一个Java讲师类对象，调用工作的方法。
+   - 创建一个UI讲师类对象，调用工作方法，和绘画方法。
+
+**答案：**
+
+```java
+public abstract class Employee {
+    private String name;
+    private String gender;
+    private int age;
+
+    public Employee() {}
+
+    public Employee(String name, String gender, int age) {
+        this.name = name;
+        this.gender = gender;
+        this.age = age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getGender() {
+        return gender;
+    }
+
+    public void setGender(String gender) {
+        this.gender = gender;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public abstract void work();
+}
+=====================================================================================================
+public interface Painting {
+    void draw();
+}
+=====================================================================================================
+public class JavaTeacher extends Employee {
+    public JavaTeacher(String name, String gender, int age) {
+        super(name, gender, age);
+    }
+
+    @Override
+    public void work() {
+        System.out.println(this + "\n" + getName() + "讲Java课");
+    }
+
+    @Override
+    public String toString() {
+        return "JavaTeacher{" +
+                "name='" + getName() + '\'' +
+                ", gender='" + getGender() + '\'' +
+                ", age=" + getAge() +
+                '}';
+    }
+}
+=====================================================================================================
+public class UITeacher extends Employee implements Painting {
+    public UITeacher(String name, String gender, int age) {
+        super(name, gender, age);
+    }
+
+    @Override
+    public void work() {
+        System.out.println(this + "\n" + getName() + "讲UI设计课");
+    }
+
+    @Override
+    public void draw() {
+        System.out.println(getName() + "画画");
+    }
+
+    @Override
+    public String toString() {
+        return "UITeacher{" +
+                "name='" + getName() + '\'' +
+                ", gender='" + getGender() + '\'' +
+                ", age=" + getAge() +
+                '}';
+    }
+}
+=====================================================================================================
+public class Test {
+    public static void main(String[] args) {
+        JavaTeacher javaTeacher = new JavaTeacher("小明", "男", 25);
+        javaTeacher.work();
+
+        UITeacher uiTeacher = new UITeacher("小红", "女", 18);
+        uiTeacher.work();
+        uiTeacher.draw();
+    }
+}
+```
+
+
+
+**运行结果：**
+
+```java
+JavaTeacher{name='小明', gender='男', age=25}
+小明讲Java课
+UITeacher{name='小红', gender='女', age=18}
+小红讲UI设计课
+小红画画
+```
+
+
+
diff --git "a/06 \351\203\255\345\256\207\351\221\253/20230509  \345\274\202\345\270\270\344\275\234\344\270\232.md" "b/06 \351\203\255\345\256\207\351\221\253/20230509  \345\274\202\345\270\270\344\275\234\344\270\232.md"
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index 0000000000000000000000000000000000000000..d5adec658e8dd75109d8618f37ee578cb765ceab
--- /dev/null
+++ "b/06 \351\203\255\345\256\207\351\221\253/20230509  \345\274\202\345\270\270\344\275\234\344\270\232.md"	
@@ -0,0 +1,23 @@
+## 1.作业
+
+```java
+public class ExampleException {
+    public static void main(String[] args) {
+        try {
+            divide(10, 0);
+        } catch (ArithmeticException e) {
+            System.out.println("除数不能为零！");
+        }
+    }
+
+    public static void divide(int dividend, int divisor) {
+        if (divisor == 0) {
+            throw new ArithmeticException("除数不能为零！");
+        }
+
+        int quotient = dividend / divisor;
+        System.out.println("商：" + quotient);
+    }
+}
+
+```
diff --git "a/20230505 \345\244\232\346\200\201\344\275\234\344\270\232.md" "b/20230505 \345\244\232\346\200\201\344\275\234\344\270\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..96ba6decd9b3370e488e33b2585d71bda6e2d040
--- /dev/null
+++ "b/20230505 \345\244\232\346\200\201\344\275\234\344\270\232.md"	
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+## 多态练习
+
+### 1、图形
+
+（1）父类Graphic图形
+
+- public double area()方法：返回0.0
+- public double perimeter()方法：返回0.0
+- public String getInfo()方法，返回图形面积和图形周长
+
+（2）子类Circle圆继承Graphic图形
+
+- 包含属性：radius，属性私有化
+- 包含get/set方法
+- 重写area()求面积方法
+- 重写perimeter()求周长方法
+- 重写getInfo()方法，返回圆的半径，面积和周长
+
+（3）子类矩形Rectangle继承Graphic图形
+
+- 包含属性：length、width，属性私有化
+- 包含get/set方法
+- 重写area()求面积方法
+- 重写perimeter()求周长方法
+- 重写getInfo()方法，返回长和宽，面积、周长信息
+
+（4）在测试类中，新建一个比较图形面积的方法，再建一个比较图形周长的方法，main方法中创建多个圆和矩形对象,再调用方法比较他们的周长或面积。
+
+```java
+// 父类Graphic
+public class Graphic {
+    public double area() {
+        return 0.0;
+    }
+
+    public double perimeter() {
+        return 0.0;
+    }
+
+    public String getInfo() {
+        return "Area: " + area() + "\nPerimeter: " + perimeter();
+    }
+}
+
+// 子类Circle
+public class Circle extends Graphic {
+    private double radius;
+
+    public Circle(double radius) {
+        this.radius = radius;
+    }
+
+    public double getRadius() {
+        return radius;
+    }
+
+    public void setRadius(double radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public double area() {
+        return Math.PI * radius * radius;
+    }
+
+    @Override
+    public double perimeter() {
+        return 2 * Math.PI * radius;
+    }
+
+    @Override
+    public String getInfo() {
+        return "Radius: " + radius + "\nArea: " + area() + "\nPerimeter: " + perimeter();
+    }
+}
+
+// 子类Rectangle
+public class Rectangle extends Graphic {
+    private double length;
+    private double width;
+
+    public Rectangle(double length, double width) {
+        this.length = length;
+        this.width = width;
+    }
+
+    public double getLength() {
+        return length;
+    }
+
+    public void setLength(double length) {
+        this.length = length;
+    }
+
+    public double getWidth() {
+        return width;
+    }
+
+    public void setWidth(double width) {
+        this.width = width;
+    }
+
+    @Override
+    public double area() {
+        return length * width;
+    }
+
+    @Override
+    public double perimeter() {
+        return 2 * (length + width);
+    }
+
+    @Override
+    public String getInfo() {
+        return "Length: " + length + "\nWidth: " + width + "\nArea: " + area() + "\nPerimeter: " + perimeter();
+    }
+}
+
+// 测试类
+public class TestGraphic {
+    public static void main(String[] args) {
+        Circle circle1 = new Circle(5);
+        Circle circle2 = new Circle(10);
+        Rectangle rectangle1 = new Rectangle(3, 4);
+        Rectangle rectangle2 = new Rectangle(5, 6);
+
+        compareArea(circle1, circle2); // 比较两个圆的面积
+        comparePerimeter(rectangle1, rectangle2); // 比较两个矩形的周长
+    }
+
+    public static void compareArea(Graphic g1, Graphic g2) {
+        double area1 = g1.area();
+        double area2 = g2.area();
+
+        if (area1 > area2) {
+            System.out.println("The first graphic has a larger area.");
+        } else if (area1 < area2) {
+            System.out.println("The second graphic has a larger area.");
+        } else {
+            System.out.println("The two graphics have the same area.");
+        }
+    }
+
+    public static void comparePerimeter(Graphic g1, Graphic g2) {
+        double perimeter1 = g1.perimeter();
+        double perimeter2 = g2.perimeter();
+
+        if (perimeter1 > perimeter2) {
+            System.out.println("The first graphic has a longer perimeter.");
+        } else if (perimeter1 < perimeter2) {
+            System.out.println("The second graphic has a longer perimeter.");
+        } else {
+            System.out.println("The two graphics have the same perimeter.");
+        }
+    }
+}
+
+```