Socket Listening problem in Netbeans

Question

Hello All
I am using "Netbeans Version 6.8" and i am making a client chat application. and it is not receiving messages from the Server Application. the code is posted bellow, Can any body rectify or solve the problem.
* To change this template, choose Tools | Templates
* and open the template in the editor.
* ChatClient.java
* Created on May 7, 2010, 4:23:42 PM
package chatclient;
import java.io.*;
import java.net.*;
import java.util.*;
//import java.awt.*;
* @author Adeel
public class ChatClient extends javax.swing.JFrame {
    /** Creates new form ChatClient */
        Socket s;
     BufferedReader br;
     BufferedWriter bw;
     List list;
    public ChatClient() {
        initComponents();
                try{
               /*Put the current IP address for current machine
               if you didn't have an actual server and clients
               if you have an actual server and clients put the client IP address*/
////               s = new Socket("localhost",100);
                        s = new Socket("127.0.0.1",100);
               br = new BufferedReader(new InputStreamReader(
                         s.getInputStream()));
               bw = new BufferedWriter(new OutputStreamWriter(
                         s.getOutputStream()));
               Thread th;
               th = new Thread();
               th.start();
          }catch(Exception e){}
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        jTextField1 = new javax.swing.JTextField();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jButton1.setText("Send");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
        jButton2.setText("Logout");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 380, Short.MAX_VALUE))
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                        .addGap(59, 59, 59)
                        .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 122, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(28, 28, 28)
                        .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 114, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 380, Short.MAX_VALUE)))
                .addContainerGap())
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 199, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton1)
                    .addComponent(jButton2))
                .addContainerGap())
        pack();
    }// </editor-fold>
    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
        System.exit(0);
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        String chatText;
        String newline = "\n";    // for new line in jTextArea
        chatText=jTextField1.getText();
        jTextArea1.append(chatText + newline);
        try{
            bw.write(chatText);
            bw.newLine();
            bw.flush();
        }catch(Exception m){}
    * @param args the command line arguments
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new ChatClient().setVisible(true);
           public void run()
          try{s.setSoTimeout(1);}catch(Exception e){}
          while (true)
               try{list.add(br.readLine());
               }catch (Exception h){}
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration
}Waiting for your response
Regards
Adeel

Answer 1

thank you for your feedback,
but it is still not showing any problem or throwing any Exception. The sending code is working properly but it is not listening/receiving any message from server application. i think, there is a void run() method which is not reacting properly.. i have commented that area in the code.. other rest of code is 100% working, i have checked that...
There are 2 run() methods in the code, Can you please check it for me, may you understand/rectify the problem why it is not listening.
* To change this template, choose Tools | Templates
* and open the template in the editor.
* ChatClient.java
* Created on May 7, 2010, 4:23:42 PM
package chatclient;
import java.io.*;
import java.net.*;
import java.util.*;
//import java.awt.*;
* @author Adeel
public class ChatClient extends javax.swing.JFrame {
    /** Creates new form ChatClient */
        Socket s;
     BufferedReader br;
     BufferedWriter bw;
     List list;
    public ChatClient() {
        initComponents();
                try{
               /*Put the current IP address for current machine
               if you didn't have an actual server and clients
               if you have an actual server and clients put the client IP address*/
////               s = new Socket("localhost",100);
                        s = new Socket("127.0.0.1",100);
               br = new BufferedReader(new InputStreamReader(
                         s.getInputStream()));
               bw = new BufferedWriter(new OutputStreamWriter(
                         s.getOutputStream()));
               Thread th;
               th = new Thread();
               th.start();
          }catch(Exception e){
                e.printStackTrace();
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        jTextField1 = new javax.swing.JTextField();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jButton1.setText("Send");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
        jButton2.setText("Logout");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 380, Short.MAX_VALUE))
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                        .addGap(59, 59, 59)
                        .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 122, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(28, 28, 28)
                        .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 114, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 380, Short.MAX_VALUE)))
                .addContainerGap())
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 199, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton1)
                    .addComponent(jButton2))
                .addContainerGap())
        pack();
    }// </editor-fold>
    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
        System.exit(0);
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        String chatText;
        String newline = "\n";    // for new line in jTextArea
        chatText=jTextField1.getText();
        jTextArea1.append(chatText + newline);
        try{
            bw.write(chatText);
            bw.newLine();
            bw.flush();
        }catch(Exception m){
        m.printStackTrace();
    * @param args the command line arguments
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
/////////////////////////////////////////////  2nd RUN METHOD,  ///////////////////////////////////////////
            public void run() {
                new ChatClient().setVisible(true);
////////////////////////////////////////////  2nd RUN METHOD,  //////////////////////////////////////////
/////////////////////////////   RUN METHOD, which may have prob  /////////////////////////////
           public void run()
          try{s.setSoTimeout(1);}catch(Exception e){
                e.printStackTrace();
          while (true)
               try{list.add(br.readLine());
               }catch (Exception h){}
/////////////////////////////   RUN METHOD, which may have prob  /////////////////////////////
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration
}Thanks again for you attention.
Regards
Adeel