From e328b915649790132b79837602632e069135d2f1 Mon Sep 17 00:00:00 2001
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 <“3175644391@qq.com”>
Date: Mon, 8 May 2023 23:56:39 +0800
Subject: [PATCH] =?UTF-8?q?=E7=AC=AC=E5=8D=81=E5=9B=9B=E6=AC=A1=E4=BD=9C?=
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---
 ...32\346\200\201\344\275\234\344\270\232.md" | 210 ++++++++++++++++++
 1 file changed, 210 insertions(+)
 create mode 100644 "22 \350\202\226\351\222\237\345\207\257\351\237\251/20230508 \345\244\232\346\200\201\344\275\234\344\270\232.md"

diff --git "a/22 \350\202\226\351\222\237\345\207\257\351\237\251/20230508 \345\244\232\346\200\201\344\275\234\344\270\232.md" "b/22 \350\202\226\351\222\237\345\207\257\351\237\251/20230508 \345\244\232\346\200\201\344\275\234\344\270\232.md"
new file mode 100644
index 0000000..77cd079
--- /dev/null
+++ "b/22 \350\202\226\351\222\237\345\207\257\351\237\251/20230508 \345\244\232\346\200\201\344\275\234\344\270\232.md"	
@@ -0,0 +1,210 @@
+# 作业
+
+~~~ java
+// 父类
+package demo02;
+
+public abstract class Graphic {
+// - 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
+    private String name;
+
+    public Graphic(String name) {
+        this.name = name;
+    }
+
+    public Graphic() {
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public double area(){
+        return 0.0;
+    }
+    public double perimeter(){
+        return 0.0;
+    }
+    public String getInfo(){
+        return null;
+    }
+}
+
+~~~
+
+~~~ java
+// 子类
+package demo02;
+// 圆形
+public class Circle extends Graphic{
+//- 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
+    private double radius;
+
+    public Circle(String name, double radius) {
+        super(name);
+        this.radius = radius;
+    }
+
+    public Circle(double radius) {
+        this.radius = radius;
+    }
+
+    public Circle() {
+    }
+
+    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 Math.PI*(radius*2);
+    }
+
+    @Override
+    public String getInfo() {
+        return getName()+"的半径为："+radius+"\t\t面积为："+area()+"\t\t\t周长为："+perimeter();
+    }
+}
+
+~~~
+
+~~~ java
+// 子类
+package demo02;
+// 矩形
+public class Rectangle extends Graphic{
+//- 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
+    private double length;
+    private double width;
+
+    public Rectangle(String name, double length, double width) {
+        super(name);
+        this.length = length;
+        this.width = width;
+    }
+
+    public Rectangle(double length, double width) {
+        this.length = length;
+        this.width = width;
+    }
+
+    public Rectangle() {
+    }
+
+    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 getName()+"的长为："+length+
+                "\t\t宽为："+width+
+                "\t\t面积为："+area()+
+                "\t\t周长为："+perimeter();
+    }
+}
+
+~~~
+
+~~~ java
+// 测试类
+package demo02;
+
+public class Test {
+    public static void main(String[] args) {
+        Graphic c1 = new Circle("圆形1",5);
+        System.out.println(c1.getInfo());
+
+        Graphic c2 = new Circle("圆形2",6);
+        System.out.println(c2.getInfo());
+
+
+        Graphic r1 = new Rectangle("矩形1", 10,20);
+        System.out.println(r1.getInfo());
+
+        Graphic r2 = new Rectangle("矩形2",15,20);
+        System.out.println(r2.getInfo());
+        System.out.println();
+
+        getArea(c1,c2);
+        getArea(c1,r1);
+        getArea(c2,r1);
+        getArea(c2,r2);
+
+        System.out.println();
+
+        getPerimeter(c1,c2);
+        getPerimeter(c1,r1);
+        getPerimeter(c2,r1);
+        getPerimeter(c2,r2);
+
+    }
+
+    //判断面积大小
+    public static void getArea(Graphic a,Graphic b){
+        if(a.area()>b.area()){
+            System.out.println(a.getName()+"的面积大于"+b.getName());
+        }else{
+            System.out.println(b.getName()+"的面积大于"+a.getName());
+        }
+
+    }
+
+    //判断周长大小
+    public static void getPerimeter(Graphic a ,Graphic b){
+        if(a.perimeter()>b.perimeter()){
+            System.out.println(a.getName()+"的周长大于"+b.getName());
+        }else{
+            System.out.println(b.getName()+"的周长大于"+a.getName());
+        }
+    }
+}
+
+~~~
+
-- 
Gitee