Java回呼函數

標籤：

 回調就是調用方持有被呼叫者的一個引用，而調用方介面的實作類別作為被呼叫者的參數，被呼叫者返回來調用調用方的方法  

介面CallBack

public interface CallBack {

/**回調方法*/
public void execute(Object ... objects);
}

 

調用方Local

public class Local implements CallBack ,Runnable{
private Remote remote;//被呼叫者作為調用方的一個引用
private String msg;

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

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

//返回的訊息
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("發送訊息");
}
public static void main(String[] args)
{
Local local = new Local(new Remote(),"Hello");

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

}

被呼叫者Remote

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

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

 

 

Java回呼函數