Question

嗨，我这几天正在练习java enum，并且已经完成了调试这些代码的任务，我发现这里的一个非常具有挑战性

public final class ParkingAttributes extends Enum
    {

    public static final ParkingAttributes BIKE;
    public static final ParkingAttributes CAR;
    public static final ParkingAttributes CYCLE;
    private static final ParkingAttributes ENUM$VALUES[];

    private ParkingAttributes(String s, int i)
    {
        super(s, i);
    }

    public static ParkingAttributes valueOf(String s)
    {
        return (ParkingAttributes)Enum.valueOf(com/tilzmatictech/mobile/navigation/delhimetronavigator/metro/ParkingAttributes, s);
    }

    public static ParkingAttributes[] values()
    {
        ParkingAttributes aparkingattributes[] = ENUM$VALUES;
        int i = aparkingattributes.length;
        ParkingAttributes aparkingattributes1[] = new ParkingAttributes[i];
        System.arraycopy(aparkingattributes, 0, aparkingattributes1, 0, i);
        return aparkingattributes1;
    }

    static 
    {
        CAR = new ParkingAttributes("CAR", 0);
        BIKE = new ParkingAttributes("BIKE", 1);
        CYCLE = new ParkingAttributes("CYCLE", 2);
        ParkingAttributes aparkingattributes[] = new ParkingAttributes[3];
        aparkingattributes[0] = CAR;
        aparkingattributes[1] = BIKE;
        aparkingattributes[2] = CYCLE;
        ENUM$VALUES = aparkingattributes;
    }
    }

有一件事，我知道枚举是一个最后的类，不能扩展我在这里找不到的地方是enum被定义和ENUM $ VALUES []的工作任何人都可以解释我这个代码的工作和一些很好的教程来掌握枚举感谢。

Answer 1

你做错了。

如果要声明枚举，请按以下步骤操作：

public enum ParkingAttributes { //Implicitly a final class that extends Enum
  BIKE, CAR, CYCLE//Implicitly static (but not final!) instances of ParkingAttributes.
}

java enum类型有点混淆

1 个答案: