Problem in my Project

Question

danthevan 0 Light Poster

13 Years Ago

Hello,
I have a weird problem while running my project.
I use netbeans and here's my code and the problem is explained after the code.

/*
 * NetworkingView.java
 */
package networking;

import org.jdesktop.application.Action;
import org.jdesktop.application.ResourceMap;
import org.jdesktop.application.SingleFrameApplication;
import org.jdesktop.application.FrameView;
import org.jdesktop.application.TaskMonitor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Timer;
import javax.swing.Icon;
import javax.swing.JDialog;
import javax.swing.JFrame;

import java.io.DataInput;
import java.io.DataInputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * The application's main frame.
 */
public class NetworkingView extends FrameView {

    ServerSocket SS;
    DataInputStream DIS;
    String FMessage;
    Socket S;

    public NetworkingView(SingleFrameApplication app) throws IOException {
        super(app);

        initComponents();
        getServerConnection();
        waitMessages();

        // status bar initialization - message timeout, idle icon and busy animation, etc
        ResourceMap resourceMap = getResourceMap();
        int messageTimeout = resourceMap.getInteger("StatusBar.messageTimeout");
        messageTimer = new Timer(messageTimeout, new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                statusMessageLabel.setText("");
            }
        });
        messageTimer.setRepeats(false);
        int busyAnimationRate = resourceMap.getInteger("StatusBar.busyAnimationRate");
        for (int i = 0; i < busyIcons.length; i++) {
            busyIcons[i] = resourceMap.getIcon("StatusBar.busyIcons[" + i + "]");
        }
        busyIconTimer = new Timer(busyAnimationRate, new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                busyIconIndex = (busyIconIndex + 1) % busyIcons.length;
                statusAnimationLabel.setIcon(busyIcons[busyIconIndex]);
            }
        });
        idleIcon = resourceMap.getIcon("StatusBar.idleIcon");
        statusAnimationLabel.setIcon(idleIcon);
        progressBar.setVisible(false);

        // connecting action tasks to status bar via TaskMonitor
        TaskMonitor taskMonitor = new TaskMonitor(getApplication().getContext());
        taskMonitor.addPropertyChangeListener(new java.beans.PropertyChangeListener() {

            public void propertyChange(java.beans.PropertyChangeEvent evt) {
                String propertyName = evt.getPropertyName();
                if ("started".equals(propertyName)) {
                    if (!busyIconTimer.isRunning()) {
                        statusAnimationLabel.setIcon(busyIcons[0]);
                        busyIconIndex = 0;
                        busyIconTimer.start();
                    }
                    progressBar.setVisible(true);
                    progressBar.setIndeterminate(true);
                } else if ("done".equals(propertyName)) {
                    busyIconTimer.stop();
                    statusAnimationLabel.setIcon(idleIcon);
                    progressBar.setVisible(false);
                    progressBar.setValue(0);
                } else if ("message".equals(propertyName)) {
                    String text = (String) (evt.getNewValue());
                    statusMessageLabel.setText((text == null) ? "" : text);
                    messageTimer.restart();
                } else if ("progress".equals(propertyName)) {
                    int value = (Integer) (evt.getNewValue());
                    progressBar.setVisible(true);
                    progressBar.setIndeterminate(false);
                    progressBar.setValue(value);
                }
            }
        });

    }

    @Action
    public void showAboutBox() {
        if (aboutBox == null) {
            JFrame mainFrame = NetworkingApp.getApplication().getMainFrame();
            aboutBox = new NetworkingAboutBox(mainFrame);
            aboutBox.setLocationRelativeTo(mainFrame);
        }
        NetworkingApp.getApplication().show(aboutBox);
    }

    /** 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() {

        mainPanel = new javax.swing.JPanel();
        lblStatus = new javax.swing.JLabel();
        jScrollPane1 = new javax.swing.JScrollPane();
        txtMessages = new javax.swing.JTextArea();
        menuBar = new javax.swing.JMenuBar();
        fileMenu = new javax.swing.JMenu();
        exitMenuItem = new javax.swing.JMenuItem();
        helpMenu = new javax.swing.JMenu();
        aboutMenuItem = new javax.swing.JMenuItem();
        statusPanel = new javax.swing.JPanel();
        statusPanelSeparator = new javax.swing.JSeparator();
        statusMessageLabel = new javax.swing.JLabel();
        statusAnimationLabel = new javax.swing.JLabel();
        progressBar = new javax.swing.JProgressBar();

        mainPanel.setName("mainPanel"); // NOI18N

        org.jdesktop.application.ResourceMap resourceMap = org.jdesktop.application.Application.getInstance(networking.NetworkingApp.class).getContext().getResourceMap(NetworkingView.class);
        lblStatus.setText(resourceMap.getString("lblStatus.text")); // NOI18N
        lblStatus.setName("lblStatus"); // NOI18N

        jScrollPane1.setName("jScrollPane1"); // NOI18N

        txtMessages.setColumns(20);
        txtMessages.setRows(5);
        txtMessages.setName("txtMessages"); // NOI18N
        jScrollPane1.setViewportView(txtMessages);

        org.jdesktop.layout.GroupLayout mainPanelLayout = new org.jdesktop.layout.GroupLayout(mainPanel);
        mainPanel.setLayout(mainPanelLayout);
        mainPanelLayout.setHorizontalGroup(
            mainPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(mainPanelLayout.createSequentialGroup()
                .addContainerGap()
                .add(mainPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 350, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(lblStatus, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 360, Short.MAX_VALUE))
                .addContainerGap())
        );
        mainPanelLayout.setVerticalGroup(
            mainPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(mainPanelLayout.createSequentialGroup()
                .add(20, 20, 20)
                .add(lblStatus, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 24, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED)
                .add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 230, Short.MAX_VALUE)
                .addContainerGap())
        );

        menuBar.setName("menuBar"); // NOI18N

        fileMenu.setText(resourceMap.getString("fileMenu.text")); // NOI18N
        fileMenu.setName("fileMenu"); // NOI18N

        javax.swing.ActionMap actionMap = org.jdesktop.application.Application.getInstance(networking.NetworkingApp.class).getContext().getActionMap(NetworkingView.class, this);
        exitMenuItem.setAction(actionMap.get("quit")); // NOI18N
        exitMenuItem.setName("exitMenuItem"); // NOI18N
        fileMenu.add(exitMenuItem);

        menuBar.add(fileMenu);

        helpMenu.setText(resourceMap.getString("helpMenu.text")); // NOI18N
        helpMenu.setName("helpMenu"); // NOI18N

        aboutMenuItem.setAction(actionMap.get("showAboutBox")); // NOI18N
        aboutMenuItem.setName("aboutMenuItem"); // NOI18N
        helpMenu.add(aboutMenuItem);

        menuBar.add(helpMenu);

        statusPanel.setName("statusPanel"); // NOI18N

        statusMessageLabel.setName("statusMessageLabel"); // NOI18N

        statusAnimationLabel.setHorizontalAlignment(javax.swing.SwingConstants.LEFT);
        statusAnimationLabel.setName("statusAnimationLabel"); // NOI18N

        progressBar.setName("progressBar"); // NOI18N

        org.jdesktop.layout.GroupLayout statusPanelLayout = new org.jdesktop.layout.GroupLayout(statusPanel);
        statusPanel.setLayout(statusPanelLayout);
        statusPanelLayout.setHorizontalGroup(
            statusPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(statusPanelSeparator, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
            .add(statusPanelLayout.createSequentialGroup()
                .addContainerGap()
                .add(statusMessageLabel)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 204, Short.MAX_VALUE)
                .add(progressBar, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(statusAnimationLabel)
                .addContainerGap())
        );
        statusPanelLayout.setVerticalGroup(
            statusPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(statusPanelLayout.createSequentialGroup()
                .add(statusPanelSeparator, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .add(statusPanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(statusMessageLabel)
                    .add(statusAnimationLabel)
                    .add(progressBar, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .add(3, 3, 3))
        );

        setComponent(mainPanel);
        setMenuBar(menuBar);
        setStatusBar(statusPanel);
    }// </editor-fold>
    // Variables declaration - do not modify
    private javax.swing.JMenuItem aboutMenuItem;
    private javax.swing.JMenuItem exitMenuItem;
    private javax.swing.JMenu fileMenu;
    private javax.swing.JMenu helpMenu;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JLabel lblStatus;
    private javax.swing.JPanel mainPanel;
    private javax.swing.JMenuBar menuBar;
    private javax.swing.JProgressBar progressBar;
    private javax.swing.JLabel statusAnimationLabel;
    private javax.swing.JLabel statusMessageLabel;
    private javax.swing.JPanel statusPanel;
    private javax.swing.JSeparator statusPanelSeparator;
    private javax.swing.JTextArea txtMessages;
    // End of variables declaration
    private final Timer messageTimer;
    private final Timer busyIconTimer;
    private final Icon idleIcon;
    private final Icon[] busyIcons = new Icon[15];
    private int busyIconIndex = 0;
    private JDialog aboutBox;

    public void getServerConnection() {
        try {
            //Connection
            SS = new ServerSocket(1234);
            lblStatus.setText("Server Listen at: " + InetAddress.getLocalHost() + " on Port: " + SS.getLocalPort());
        } catch (IOException ex) {
            lblStatus.setText("Error occured while Connecting to the Server");
        }
    }

    public void waitMessages() {

        while (true) {
          
                try {
                    S = SS.accept();
                    DIS = new DataInputStream(S.getInputStream());
                // DIS.readUTF(); //Now converted from bytes to Strings.
                FMessage = DIS.readUTF();
                txtMessages.append(FMessage + "/n");
                } catch (IOException ex) {
                    Logger.getLogger(NetworkingView.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    }

The problem is that in the constructor, when I remove waitMessages(); the Form shows and when I put it back it doesn't open.
I was trying to convert my console project into GUI but this was my problem.

Thanks.

java

2 Contributors
9 Replies
236 Views
21 Hours Discussion Span
Latest Post 13 Years Ago Latest Post by danthevan

JamesCherrill 4,733 Most Valuable Poster

13 Years Ago

I haven't read all that code, but...
it looks like waitMessages loops indefinitely, so when you call it it never returns, so nothing after it gets executed. Maybe it needs to run in its own thread and you just start it from the constructor?

JamesCherrill 4,733 Most Valuable Poster

13 Years Ago

Yes, it must run in its own thread in that case.

JamesCherrill 4,733 Most Valuable Poster

13 Years Ago

OK you lucky people - here's the first public outing for JC's instant "how to start a thread as simply as possible" tutorial.
1. You have a method doStuff() that you want to run in a new Thread.
2. Threads need a class that implements Runnable (ie with a run() method) to define what needs to be executed in the thread.
You can do that with a simple inner class:

Runnable myRunnable = new Runnable() {
         public void run() {  // the run method...
            doStuff();        // .. just starts your doStuff method     
         }
      };

now you can create a Thread with that Runnable

Thread myThread = new Thread(myRunnable );

finally you just have to start the thread executing

myThread.start();

that's all folks!

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danthevan 0 Light Poster · Answer 1 · 2011-10-22T01:45:29+00:00

Yea because this file is the server so it is waiting for respond. I can not make it without an infinite loop

danthevan 0 Light Poster · Answer 2 · 2011-10-22T01:46:15+00:00

danthevan 0 Light Poster

13 Years Ago

I'll just try making it in a thread.

danthevan 0 Light Poster · Answer 3 · 2011-10-22T01:57:05+00:00

Thanks, I'll take some time doing it because im still a beginner. I'll reply back if it works.

JamesCherrill 4,733 Most Valuable Poster Team Colleague Featured Poster · Answer 4 · 2011-10-22T02:01:39+00:00

Avoid all the complicated threading options and just do it one of the two simple ways as described in
http://download.oracle.com/javase/tutorial/essential/concurrency/runthread.html
it doesn't matter which you chose. Either way its just a few lines of code.

danthevan 0 Light Poster · Answer 5 · 2011-10-22T02:15:19+00:00

I just can't get it into my code. Can you tell me what should I do?

danthevan 0 Light Poster · Answer 6 · 2011-10-22T16:10:13+00:00

danthevan 0 Light Poster

13 Years Ago

Thanks a lot :D