simultaneosly running server class and JFrame, the JFrame wont show the components.

[Roldan Baldo]

SERVER

    
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;


public class Server extends Thread {
   private ServerSocket server;
   private int port = 7777;

    Server() {
        try {
            server = new ServerSocket(port);
        } catch (IOException e) {
           e.printStackTrace();
        }
    }

    public void handleConnection() {
        while (true) {
            try {
                Socket socket = server.accept();
                new ConnectionHandler(socket);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String a[]) {
        Server handle = new Server();
        handle.handleConnection();
    }
}

CONNECTIONHANDLER

    
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.Socket;

public class ConnectionHandler implements Runnable{
    private Socket socket;

   public ConnectionHandler(Socket socket) {
        this.socket = socket;

        Thread t = new Thread(this);
        t.start();
    }

    public void run() {
        try
        {
            ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
            String message = (String) ois.readObject();
            System.out.println("Message Received: " + message);
            
            ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream());
            oos.writeObject("dawat na nako u message");

            ois.close();
            oos.close();
            socket.close();

            System.out.println("Waiting for client message...");
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

and a Simple JFrame

    
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class ui implements Runnable{
    public ui(){
        JFrame frame = new JFrame("bhadz");
            JPanel panel = new JPanel();
            JButton button = new JButton("Button");
            panel.add(button);
        frame.getContentPane().add(panel);
        frame.setSize(300,300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
    public void run(){
    }
    public static void main(String a[]){
        new ui();
    }
}

my main class here

    
public class Main {
    public static void main(String[] args) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                Thread s = new Thread(new Server());
                s.start();
                Thread th = new Thread(new ui());
                th.start();
            }
        });
    }
}

why is it that the JFrame will not show its components properly,? the server is running. but i have no components seen in JFrame

[Rob Spoor]

Your GUI code is not being executed in the Event Dispatcher Thread. Sure, you enter the EDT. But then you launch another thread that does the GUI work.

Scratch that. You are creating the GUI in the EDT - the "new ui()" does that. The thread that will be "running" it will not do anything, since ui's run() method does absolutely nothing.
But this isn't your real code; for one, Server doesn't implement Runnable so line 6 of your Main class will not compile. PostRealCode.

[Roldan Baldo]

sorry i forgot the extends thread in the server, now its ok. my real code is complicated though. how will the GUI work as i wanted to?
thanks.

[Steve Luke]

You will have to post real code which shows the problem. I copy the code you put up here and the frame and button get displayed correctly.