Java enum

public enum Weekday {
    MON, TUE, WED, THU, FRI, SAT, SUN;
}

enum Weekday {
    MON(1, "星期一"), TUE(2, "星期二"), WED(3, "星期三"), THU(4, "星期四"), FRI(5, "星期五"), SAT(6, "星期六"), SUN(0, "星期日");

    public final int dayValue;
    private final String chinese;

    private Weekday(int dayValue, String chinese) {
        this.dayValue = dayValue;
        this.chinese = chinese;
    }

    @Override
    public String toString() {
        return this.chinese;
    }
}