【JAVA学习笔记】46-（43）第十一章作业

项目代码

github /yinhai1114/Java_Learning_Code/tree/main/IDEA_Chapter11/src/com/yinhai/homework11

1.枚举类

1.创建一个Color枚举类

2.有RED,BLUE,BL ACK,YELLOW,GREEN这个五个枚举值/对象:

3. Color有三 个属性redValue, greenValue, blueValue,

4.创建构造方法，参数包括这三个居性，

5.每个枚举值都要给这三个属性赋值，三个属性对应的值分别是

6. red: 255.0,0 blue:0,0,255 black:0,0,0 yellow:255,255,0 green:0,255,0

7.定义接口，里面有方法show,要求Color实现该接口

8. show方法中显示三属性的值

9.将枚举对象在switch语句中四配使用  

easy，just do exercise

/** * @author 银海 * @version 1.0 */ public class Homework01 { public static void main(String[] args) { IMyColor iMyColor = Color.BLACK;//没有想出来接口除了这里能用还有哪里能用 //也没有啥好处啊，方便以后拓展SRGB?或者HSB?但颜色范围也对不上啊，不懂 iMyColor.show(); switch ((Color)iMyColor){ case RED: System.out.println("匹配为红色"); break; case BLUE: System.out.println("匹配为蓝色"); break; case BLACK: System.out.println("匹配为黑色"); break; case GREEN: System.out.println("匹配为绿色"); break; case YELLOW: System.out.println("匹配为黄色"); break; default: System.out.println("啥都不是"); } } } interface IMyColor{ void show(); } enum Color implements IMyColor{ RED(255,0,0),BLUE(0,0,255),BLACK(0,0,0),YELLOW(255,255,0),GREEN(0,255,0); private int redValue; private int greenValue; private int blueValue; Color(int redValue, int greenValue, int blueValue) { this.redValue = redValue; this.greenValue = greenValue; this.blueValue = blueValue; } public void show(){ System.out.println(redValue + " " + greenValue + " " + blueValue); } }