Java running GUI program from IDE Netbeans

Question

I'm developing a GUI app in JAVA with SWING. I have a problem when I tried to run the GUI from the Netbeans IDE, Once the GUI is running I'm unable to click or do anything in the interface, in other words, I can't interact with the UI. For example, when I try to push a button, It does nothing, It's like freezing however it doesn't show any errors and you can close it normally (x icon) Here's a pic

Netbeans

Anyone know how to solve this?

I'm using Ubuntu 14.04 LTS 64,

java version "1.7.0_75" OpenJDK Runtime Environment (IcedTea 2.5.4) (7u75-2.5.4-1~trusty1) OpenJDK 64-Bit Server VM (build 24.75-b04, mixed mode)

javac 1.7.0_75

Here's the code. It's just auto-generated code.

public class MainPageAppUI extends javax.swing.JFrame {

/**
 * Creates new form MainPageAppUI
 */
public MainPageAppUI() {
    initComponents();
}

/**
 * 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() {

    jPanel2 = new javax.swing.JPanel();
    jPanel1 = new javax.swing.JPanel();
    DiagnosticoButton = new javax.swing.JButton();
    NuevoPacienteButton1 = new javax.swing.JButton();
    PuntoAcupunturaButton = new javax.swing.JButton();
    PulsosButton = new javax.swing.JButton();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    setTitle("Acupuntura");
    setBackground(new java.awt.Color(0, 0, 0));
    setEnabled(false);
    setResizable(false);

    jPanel2.setBackground(new java.awt.Color(255, 255, 255));
    jPanel2.setForeground(new java.awt.Color(255, 255, 255));

    DiagnosticoButton.setText("Diagnóstico");
    DiagnosticoButton.setToolTipText("");

    NuevoPacienteButton1.setText("Nuevo Paciente");
    NuevoPacienteButton1.setPreferredSize(new java.awt.Dimension(146, 29));
    NuevoPacienteButton1.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            NuevoPacienteButton1ActionPerformed(evt);
        }
    });

    PuntoAcupunturaButton.setText("Puntos Acupuntura");
    PuntoAcupunturaButton.setToolTipText("");

    PulsosButton.setText("Pulsos");
    PulsosButton.setToolTipText("");

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
    jPanel1.setLayout(jPanel1Layout);
    jPanel1Layout.setHorizontalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel1Layout.createSequentialGroup()
            .addGap(23, 23, 23)
            .addComponent(NuevoPacienteButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 160, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(39, 39, 39)
            .addComponent(PuntoAcupunturaButton, javax.swing.GroupLayout.PREFERRED_SIZE, 160, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(44, 44, 44)
            .addComponent(DiagnosticoButton, javax.swing.GroupLayout.PREFERRED_SIZE, 160, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 46, Short.MAX_VALUE)
            .addComponent(PulsosButton, javax.swing.GroupLayout.PREFERRED_SIZE, 160, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(30, 30, 30))
    );
    jPanel1Layout.setVerticalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel1Layout.createSequentialGroup()
            .addGap(20, 20, 20)
            .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(NuevoPacienteButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(PuntoAcupunturaButton, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(DiagnosticoButton, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(PulsosButton, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addContainerGap(22, Short.MAX_VALUE))
    );

    javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
    jPanel2.setLayout(jPanel2Layout);
    jPanel2Layout.setHorizontalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
    );
    jPanel2Layout.setVerticalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel2Layout.createSequentialGroup()
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(0, 333, Short.MAX_VALUE))
    );

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(0, 0, Short.MAX_VALUE))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jPanel2, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
    );

    pack();
}// </editor-fold>                        

private void NuevoPacienteButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                                     
    System.out.println("You've pressed Nuevo paciente!");

}                                                    

/**
 * @param args the command line arguments
 */
public static void main(String args[]) {
    /* Set the Nimbus look and feel */
    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
     */
    try {
        for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(MainPageAppUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(MainPageAppUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(MainPageAppUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(MainPageAppUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new MainPageAppUI().setVisible(true);
        }
    });
}

// Variables declaration - do not modify                     
private javax.swing.JButton DiagnosticoButton;
private javax.swing.JButton NuevoPacienteButton1;
private javax.swing.JButton PulsosButton;
private javax.swing.JButton PuntoAcupunturaButton;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
// End of variables declaration                   
}

Thanks in advance!

Consider providing a runnable example which demonstrates your problem. This is not a code dump, but an example of what you are doing which highlights the problem you are having. This will result in less confusion and better responses — MadProgrammer
– MadProgrammer, Commented Apr 15, 2015 at 22:54
The only reason a Swing UI would "freeze" is because you're running some kind of blocking action (like reading from an InputStream which is waiting for input) or you have some kind long running loop which is executing from within the context of the Event Dispatching Thread — MadProgrammer
– MadProgrammer, Commented Apr 15, 2015 at 22:56
I've added the code. I didn't post it because it is an autogenerated code, I'm using the design view to build the GUI. I'm not performing any blocking action like you said, I drop some buttons on the panel. Thanks for taking the time to read and help! — Mauro Alvarez
– Mauro Alvarez, Commented Apr 16, 2015 at 0:21

MadProgrammer · Accepted Answer · 2015-04-16 00:26:36Z

1

Well, that's extremely unexpected, however, the problem is in your initComponents method

setEnabled(true);

Seems simple enough, but changing it to setEnabled(false); solves the problem

answered Apr 16, 2015 at 0:26

MadProgrammer

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2 Comments

Mauro Alvarez Over a year ago

Thanks! It works!, I've to use an external editor, because netbeans doesn't allow to modify the auto generated code

MadProgrammer Over a year ago

You can use the form editor and properties editor to change the state of the form ;)

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