我试图通过套接字实现一个基本的聊天应用程序，但我有objectinputstream的问题。我在while（true）循环中同时使用write-read方法，而编译过程在没有可读取内容并无限期等待时陷入困境。因此，我需要检查它是空的还是不读之前。
这是我的密码。
服务器：

Socket socket = server.accept();

        ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
        ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream());

        oos.writeObject("Server connected!");
        oos.flush();

        String message = (String) ois.readObject();
        System.out.println(ois.available());
        txtChat.setText(message);

        while(true) {

            if(sendMessage) {

                oos.writeObject(txtMessage.getText());
                oos.flush();

                sendMessage = false;
            }

            while(!sendMessage) {
                message = (String) ois.readObject();
                txtChat.setText(txtChat.getText()+"\n"+"Client: "+message);
            }

            Thread.sleep(100);
        }

客户：

socket = new Socket(host.getHostName(), 9876);
        oos = new ObjectOutputStream(socket.getOutputStream());
        ois = new ObjectInputStream(socket.getInputStream());

        oos.flush();

        String message = (String) ois.readObject();
        txtChat.setText(message);

        while(true) {
            message = (String) ois.readObject();
            txtChat.setText(txtChat.getText()+"\n"+"Server: "+message);

            if(sendMessage) {
                oos.writeObject(txtMessage.getText());
                oos.flush();

                sendMessage = false;
            }

            Thread.sleep(100);
        }