Java回调函数

 回调就是调用方持有被调用方的一个引用，而调用方接口的实现类作为被调用方的参数，被调用方返回来调用调用方的方法 

 

接口CallBack

public interface CallBack {

/**回调方法*/
public void execute(Object ... objects);
}

调用方Local

public class Local implements CallBack ,Runnable{
private Remote remote;//被调用方作为调用方的一个引用
private String msg;

public Local(Remote remote, String msg) {
super();
this.remote = remote;
this.msg = msg;
}

@Override
public void execute(Object... objects) {

//返回的消息
System.out.println(objects[0]);

System.out.println(Thread.currentThread().getName());
Thread.interrupted();
}

public void sendMessage() {
System.out.println(Thread.currentThread().getName());
Thread thread = new Thread(this);
thread.start();
System.out.println("发送消息");
}
public static void main(String[] args)
{
Local local = new Local(new Remote(),"Hello");

local.sendMessage();
}
@Override
public void run() {
remote.executeMessage(msg, this);
}

}

被调用方Remote

public class Remote {
public void executeMessage(String msg,CallBack callBack){

System.out.println(msg);
System.out.println("接收到了Local传过来的命令");
callBack.execute(new String[]{"Hello Local"});
}
}