Java基础 9.2

Java枚举与高级类练习

最新推荐文章于 2025-12-02 21:20:38 发布

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1.枚举和高级类练习

package com.logic.annotation;

/**
 * @author logic
 * @version 1.0
 */
/*
创建一个Color枚举类
有 RED,BLUE,BLACK,YELLOW,GREEN这个五个枚举值/对象;
Color有三个属性redValue，greenValue，blueValue,
创建构造方法，参数包括这三个属性，
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
red:255,0,0 blue:0,0,255 black:0,0,0 yellow:255,255,0 green:0,255,0
要求Color实现该接口 定义接口，里面有方法show，
show方法中显示三属性的值
将枚举对象在switch语句中匹配使用
 */
public enum Color implements A {
    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.blueValue = blueValue;
        this.greenValue = greenValue;
    }

    @Override
    public void show() {
        System.out.println(redValue + "," + blueValue + "," + greenValue);
    }
}

interface A {
    void show();
}

package com.logic.annotation;

/**
 * @author logic
 * @version 1.0
 */
public class Homework08 {
    public static void main(String[] args) {
        Color black = Color.BLACK;
        black.show();

        switch (black) {
            case RED:
                System.out.println("匹配到红色");
                break;
            case BLUE:
                System.out.println("匹配到蓝色");
                break;
            case BLACK:
                System.out.println("匹配到黑色");
                break;
            case GREEN:
                System.out.println("匹配到绿色");
                break;
            case YELLOW:
                System.out.println("匹配到黄色");
        }
    }
}