Java枚举类

所有的枚举都继承自java.lang.Enum类

public interface LShow{
	void show();
}

public enum Level implements LShow{
    LOW(30){
        @Override
        public void show(){
        	//...
		}
	}, 
    MEDIUM(15){
        @Override
        public void show(){
        	//...
		}
	},
    HIGH(7){
        @Override
        public void show(){
			//...
		}
	},
    URGENT(1){
        @Override
        public void show(){
			//...
		}
	};
    
    private int levelValue;
    
    private Level(int levelValue) {
		this.levelValue = levelValue;
    } 
    public int getLevelValue() {
		return levelValue;
    }
}