关于回调理解

xiaojiahao_kevin

于 2016-07-14 19:10:24 发布

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本文链接：https://blog.youkuaiyun.com/xiaojiahao_kevin/article/details/51851312

1.回调分为回调跟异步回调

1.1回调

public class Me {
	
	public static void main(String[] args)
	{
		People people=new People();
		people.goHome(new Car() {
			@Override
			public void start()
			{
				System.out.println("The car has started.........");    1
			}
		});
		
		
	}

}

public interface Car {
	public void start();
}

public class People {


public void goHome(Car car){
car.start();                                                                         2
System.out.println("Go home now!");                              3
}
}

dbug一下就知道代码执行路径是2---->1----->3

1.2异步回调

如ajax，新建线程去跑程序，如阻塞队列，发起请求不等相应继续往下执行，主线程不会去等待