測試類

/**
     * @param args
     */
    public static void main(String[] args) {
        demo1();
        demo2();
        demo3();

        Week3 mon = Week3.TUE;
        switch (mon) {
        case MON:
            System.out.println("星期一");
            break;
        case TUE:
            System.out.println("星期二");
            break;
        }
    }

    public static void demo3() {
        Week3 mon = Week3.MON;
        mon.show();
    }

    public static void demo2() {
        Week2 mon = Week2.MON;
        System.out.println(mon.getName());
    }

    public static void demo1() {
        Week mon = Week.MON;
        System.out.println(mon);
    }
 

第一種方法

public enum Week {
    MON,TUE,WED;
}

第二種方法

public enum Week2 {
    MON("星期一"),TUE("星期二"),WED("星期三");

    private String name;
    private Week2(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }

    public String toString() {
        return name;
    }
}
 

第三章方法

public enum Week3 {
    MON("星期一"){
        public void show() {
            System.out.println("星期一");
        }
    },TUE("星期二"){
        public void show() {
            System.out.println("星期二");
        }
    },WED("星期三"){
        public void show() {
            System.out.println("星期三");
        }
    };

    private String name;
    private Week3(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }

    public abstract void show();

}
 

java枚舉學習筆記二