Override注解方法，防止出错.

IDE的代码检测 也可以起到该作用

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package com.canal.demo;

public class ZookeeperHello {

	private static  abstract class Parent{
		public  abstract void help();
		public void help2(){
			System.out.println("help2 method");
		}
	}

	private static class Child extends Parent{

		@Override //
		public void help() {
			System.out.println("help2 method");
		}

		//防止写错名字 导致逻辑失败
		@Override 
		public void help2() {
			super.help2();
		}
	}

}