Question

您好我正在尝试从线程（使用runnable创建）将图像发送到我的GUI

我扩展了一个可观察的

public class receiveRunnable extends Observable implements Runnable{
   public void run() {
       try {
           //crée un serverSocket branché sur le meme port que send
           ServerSocket serverSocket = new ServerSocket(5000);
           Socket socket = serverSocket.accept();
           //reçoit l'image serialisée
           InputStream inputStream = (InputStream) socket.getInputStream();
           System.out.println("Reading: " + System.currentTimeMillis());
           //déserialise l'image
           byte[] sizeAr = new byte[4];
           inputStream.read(sizeAr);
           int size = ByteBuffer.wrap(sizeAr).asIntBuffer().get();
           byte[] imageAr = new byte[size];
           inputStream.read(imageAr);
           BufferedImage image = ImageIO.read(new ByteArrayInputStream(imageAr));
           System.out.println("Received " + image.getHeight() + "x" + image.getWidth());
           Object img = (Object) image;
           setChanged();
           notifyObservers(img);
           System.out.println("yeah");
       }catch(IOException e){
           e.printStackTrace();
       }
   }
}

我实现了一个带有update方法的观察者，应该使用notifyObserver（image）调用

class win extends JFrame implements Observer {

public void update(Observable receivedRunnable, Object arg) {
  System.out.println("ok" );
  JFrame ji = new JFrame();
  JPanel po = new JPanel();
  JLabel c = new JLabel();
  BufferedImage image = (BufferedImage) arg;
  ImageIcon icoff = new ImageIcon(image);
  c.setIcon(icoff);
  po.add(c);
  ji.setVisible(true);
  ji.setContentPane(po);
}

}

然后在我的主要部分我尝试用addObservers（）

链接

public static void main(String [] args){
  Fenetre a = new Fenetre();
  receiveRunnable runnable = new receiveRunnable();
  runnable.addObserver((Observer) a);
  Thread receiveThread = new Thread();
  receiveThread.run();
}

我绝对不知道为什么但是我收到了这条消息

interfaceGraphique.Fenetre无法强制转换为java.util.Observer

我读了我发现的所有内容，我甚至无法找到问题的原因

将observable链接到观察者java

0 个答案: