Java基础：枚举类enum入门案例

news2025/3/14 11:12:38

1.基础枚举定义与使用：

package com.zxy;

public class Main {
    public static void main(String[] args) {
//        获取枚举值
        cars car = cars.BMW;
        switch (car){
            case BMW :
                System.out.println("BMW");
                break;
            case BENZ :
                System.out.println("BENZ");
                break;
            case AUDI :
                System.out.println("AUDI");
                break;
        }
//      增强for循环遍历枚举
        for(cars cars:cars.values()){
            System.out.println(cars);
        }

    }
}
enum cars{
    BMW, BENZ, AUDI;
}

输出：

红色
所有颜色：
RED
GREEN
BLUE

2.带属性和方法的枚举

package com.zxy;

public class Main2 {
    public static void main(String[] args) {
        Status status = Status.UnReady;
        System.out.println(status);
        System.out.println("状态码："+status.getNum());
        System.out.println("状态："+status.getStatusName());

//        values()返回枚举名数组
        Status[] values = Status.values();
        for (Status status1 : values) {
            System.out.println(status1);
        }
//        valueOf()返回枚举名
        Status status2 = Status.valueOf("UnReady");
        System.out.println(status2);
    }
}

enum Status {
    UnReady(0, "未准备"),
    Ready(1, "已准备"),
    Start(2, "已启动");

    private final Integer Num;
    private final String statusName;

    public Integer getNum() {
        return Num;
    }

    public String getStatusName() {
        return statusName;
    }

    Status(int Num, String statusName) {
        this.Num = Num;
        this.statusName = statusName;
    }
}