相关疑难解决方法(0)

考虑下面enums哪个更好？它们都可以完全相同的方式使用,但它们相互之间的优势是什么？

1.覆盖抽象方法:

public enum Direction {
    UP {
        @Override
        public Direction getOppposite() {
            return DOWN;
        }
        @Override
        public Direction getRotateClockwise() {
            return RIGHT;
        }
        @Override
        public Direction getRotateAnticlockwise() {
            return LEFT;
        }
    },
    /* DOWN, LEFT and RIGHT skipped */
    ;
    public abstract Direction getOppposite();
    public abstract Direction getRotateClockwise();
    public abstract Direction getRotateAnticlockwise();
}

2.使用单一方法:

public enum Orientation {
    UP, DOWN, LEFT, RIGHT;
    public Orientation getOppposite() {
        switch (this) {
        case UP:
            return DOWN;
        case DOWN: …

enum Enum1
{
    BIG(8), HUGE(10)
    {
        public String getName()
        {
            return "Huge";
        }

        public String getContry()
        {
            return "India";
        }//additional Method
    },
    OVERWHELMING(16)
    {
        public String getName()
        {
            return "OVERWHELMING";
        }
    };
    private int ounces;

    public int getOunes()
    {
        return ounces;
    }

    public String getName()
    {
        return "Ponds";
    }

    Enum1(int ounces1)
    {
        ounces = ounces1;
    }
}

class EnumAsInnerClass
{
    Enum1 enumInnerClass;

    public static void main(String[] args)
    {
        EnumAsInnerClass big = new EnumAsInnerClass();
        big.enumInnerClass = Enum1.BIG;
        EnumAsInnerClass over = new …