java - object.notify() 不会唤醒 object.wait()

Question

我正在尝试使用“synchronized(object) {object.wait()}”来暂停我的服务器，直到对象准备就绪。我在类中调用了“synchronized(object) {object.notify() }”来设置对象值。但似乎我的服务器在 wait() 之后就再也没有醒来过。

public class MyServer {
...
do {
            try {

                message = (String) in.readObject();
                System.out.println("server receive>" + message);

                synchronized (myServerSend) {
                    myServerSend.wait();
                }

                System.out.println("Am I wake up???"); //this never print out

                sendMessage(myServerSend);

            } catch (ClassNotFoundException classnot) {
                System.err.println("Data received in unknown format");
            }
        } while (!message.equals("bye"));

    } catch (IOException ioException) {
        ioException.printStackTrace();
    }
....
}

这是我对设置对象值的调用

public class Action implements MouseInputListener, MouseMotionListener {

    ....

    public void mouseClicked(MouseEvent e) {


        if (SwingUtilities.isLeftMouseButton(e)) {...
    }

        else {
            ....
            if(MyGame.currentPlayer == MyGame.WHITE) {
                    myServerSend = "" + chosenPieceIndex + "," + moveLocationIndex;
                    synchronized (myServerSend) {

                        myServerSend.notify(); // this seems like fail to wake up myServer

                    }
                    System.out.println(myServerSend);
}

如果我将 myServerSend 声明为公共(public)静态字符串类型会有问题吗？有人可以帮忙吗？提前致谢!

Answer 1

也许您在等待之前就得到了通知代码。出于这个原因，您应该始终将 thread.wait() 放在 while 循环内(也由于虚假唤醒 - 但出于这个原因， do while 就足够了)。