简化Java中Enum类的方法

public enum Color {
    RED, GREEN, BLUE
}

public enum Color {
    RED("红色", 1), GREEN("绿色", 2), BLUE("蓝色", 3);

    private String name;
    private int index;

    private Color(String name, int index) {
        this.name = name;
        this.index = index;
    }

    public String getName() {
        return name;
    }

    public int getIndex() {
        return index;
    }
}

public static void main(String[] args) {
    for (Color color : Color.values()) {
        System.out.println(color.getName() + " " + color.getIndex());
    }
}

Color color = Color.valueOf("RED");
System.out.println(color.getName() + " " + color.getIndex());

Color color = Color.RED;
switch (color) {
    case RED:
        System.out.println("红色");
        break;
    case GREEN:
        System.out.println("绿色");
        break;
    case BLUE:
        System.out.println("蓝色");
        break;
}

EnumMap<Color, String> colorMap = new EnumMap<Color, String>(Color.class);
colorMap.put(Color.RED, "红色");
colorMap.put(Color.GREEN, "绿色");
colorMap.put(Color.BLUE, "蓝色");

System.out.println(colorMap.get(Color.RED));