public enum WeekDay {
//	First,Second,Three,Four,Fix,Six,Seven;
	
	INSTANCE;
	
	public static WeekDay getIntance(){
		if(INSTANCE!=null) {
			return INSTANCE;
		}
		return INSTANCE;
	}
	

}

下面是利用反射读取 

try {
			Class forName = Class.forName("com.lideng.parse.WeekDay");
			Constructor[] constructors = forName.getConstructors();
			for (int i = 0; i < constructors.length; i++) {
				System.out.println(constructors[i]);
			}
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
	
	}

  

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