java 枚举类

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

    private String name;
    private int code;

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

    public String getName() {
        return name;
    }

    public int getCode() {
        return code;
    }
}

public interface Printable {
    void print();
}

public enum Color implements Printable {
    RED {
        @Override
        public void print() {
            System.out.println("This is red.");
        }
    },
    GREEN {
        @Override
        public void print() {
            System.out.println("This is green.");
        }
    },
    BLUE {
        @Override
        public void print() {
            System.out.println("This is blue.");
        }
    };
}

for (Color color : Color.values()) {
    System.out.println(color.getName() + ": " + color.getCode());
}