Re: Help wiith input/output of jar

In article
<2424f942-de6f-4ad6-a155-25fd5c158...@k19g2000yqn.googlegroups.com>,

 bH <bherbs...@hotmail.com> wrote:

It looks like your EchoClient is blocking the EDT in actionPerformed().
As client and server are largely symmetric, here's an example that does
both:

<code>
package net;

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.Scanner;
import javax.swing.*;

/**
 * A simple network client-server pair
 * @author John B. Matthews
 */
public class Echo implements ActionListener, Runnable {

    private static final String HOST = "127.0.0.1";
    private static final int PORT = 12345;
    private final JTextField tf = new JTextField(25);
    private final JTextArea ta = new JTextArea(15, 25);
    private final JButton send = new JButton("Send");
    private volatile PrintWriter out;
    private Scanner in;
    private Thread client;
    private Kind kind;

    public static enum Kind {
        Client(100, "Trying"), Server(500, "Awaiting");
        private int offset;
        private String activity;
        private Kind(int offset, String activity) {
            this.offset = offset;
            this.activity = activity;
        }
    }

    public Echo(Kind kind) {
        this.kind = kind;
        JFrame f = new JFrame("Echo " + kind);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getRootPane().setDefaultButton(send);
        f.add(tf, BorderLayout.NORTH);
        f.add(new JScrollPane(ta), BorderLayout.CENTER);
        f.add(send, BorderLayout.SOUTH);
        f.setLocation(kind.offset, 300);
        f.pack();
        f.setVisible(true);
        send.addActionListener(this);
        ta.setLineWrap(true);
        ta.setWrapStyleWord(true);
        display(kind.activity + HOST + " on port " + PORT);
        client = new Thread(this, "Client");
    }

    public void start() {
        client.start();
    }

    @Override
    public void actionPerformed(ActionEvent ae) {
        String s = tf.getText();
        if (out != null) {
            out.println(s);
        }
        display(s);
        tf.setText("");
    }

    @Override
    public void run() {
        try {
            Socket socket;
            if (kind == Kind.Client) {
                socket = new Socket(HOST, PORT);
            } else {
                ServerSocket ss = new ServerSocket(PORT=

                socket = ss.accept();
            }
            in = new Scanner(socket.getInputStream());
            out = new PrintWriter(socket.getOutputStream(),=

            display("Connected");
            while (true) {
                display(in.nextLine());
            }
        } catch (Exception e) {
            display(e.getMessage());
            e.printStackTrace();
        }
    }

    private void display(String s) {
        ta.append(s + "\u23CE\n");
        ta.setCaretPosition(ta.getDocument().getLength());
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                new Echo(Kind.Server).start();
                new Echo(Kind.Client).start();
            }
        });
    }}

</code>

[...]
--
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>- Hide quoted text -

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