JAVA 回调实例
自己写了一个例子演示JAVA中对耗时操作的回调通知,要求客户程序员实现抽象类Test中的回调接口onCompletion(),代码如下:
interface RequestListener{ public void request(String action); public void onCompletion(String response); } abstract class Test implements RequestListener{ @Override public void request(final String action) { System.out.println("received request-->"+action); new Thread(new Runnable() { @Override public void run() { try { Thread.sleep(10000); } catch (InterruptedException e) { e.printStackTrace(); } onCompletion("requested work done=" + action); } }).start(); System.out.println("request return..."); } } public class AnyTest extends Test{ @Override public void onCompletion(String response) { System.out.println(response); } public void ownWork(){ System.out.println("My own work..."); } public static void main(String[] args){ AnyTest at = new AnyTest(); at.request("WORK1"); at.ownWork(); } }
输出:
received request-->WORK1
request return...
My own work...
requested work done=WORK1
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