Swing Error con GridbagLayout

Question

Estoy escribiendo un cuadro de diálogo Mutlientry usando el Administrador de diseño de la bolsa de cuadrícula, cuando intento ejecutar este programa, me muestra un error extraño que nunca encontré.

 public class MultiEntryDlg extends JDialog {
    private static final long serialVersionUID = 1L;
   private final JPanel             contentPanel    = new JPanel() ;
   private DButton          pb_OK                   = null ;  
   private DButton          pb_CANCEL               = null ;  
   private JLabel           lb_Name                 = null ;
   private JTextField       ef_name                 = null ;
   private JLabel           lb_taxonomyValue        = null;
   private JTextField       ef_taxonomyValue        = null ;
   private JLabel           lb_subscriptionKey      = null ;
   private JTextField       ef_subscriptionKey      = null ;
   private JCheckBox        cb_subscribable         = null ;
   private JTextField       ef_alias                = null ;
   private JLabel           lb_alias                = null ;
   private JLabel           lb_orderNumber          = null ;
   private JTextField       ef_orderNum             = null ;
   private JTextAreaCounter mle_DESCRIPTION_COUNTER = null ;               
   private SpellCheckPanel  spellCheckPanel         = null ;
   private JLabel    lb_contentLocation             = null ;
   private JComboBox contentlocCombo                = null ;
   private JLabel    lb_brandSubGrp                 = null ;
   private JComboBox brandSubGrpCombo               = null ;
   private JLabel    lb_fixedLocation               = null ;
   private JComboBox fixedlocCombo                  = null ;
   private JLabel    lb_taxonomyType                = null ;
   private JComboBox taxonomyCombo                  = null ;
   private NoTabJTextArea mle_DESCRIPTION           = null ;

   private MultiEntryDlg(){
       creatAndShowGUI();
   }

   public void actionPerformed ( ActionEvent e ) {

      if ( ( e.getSource() == pb_OK )
          dispose();
      else if (e.getSource() ==pb_CANCEL)
          dispose();
   }
   private void creatAndShowGUI(){
       initializeBasicProperty();
       addComponents();
   }

private void addComponents() {
    // TODO Auto-generated method stub
    lb_Name = new JLabel("Name (Max 75 char)");
    addLeftAlign(lb_Name, 0, 1);
    ef_name = new JTextField(10);
    addMergeColumn(ef_name, 1, 1, 2);
    spellCheckPanel = new SpellCheckPanel();
    spellCheckPanel.setTextComponent(ef_name);
    addCenterAlign(spellCheckPanel, 3, 1);
    lb_alias = new JLabel("Alias");
    addLeftAlign(lb_alias, 0, 2);
    ef_alias = new JTextField(10);
    addMergeColumn(ef_alias, 1, 2, 3);
    lb_orderNumber = new JLabel("Order Number");
    addLeftAlign(lb_orderNumber, 0, 3);
    ef_orderNum = new JTextField(10);
    addCenterAlign(ef_orderNum, 1, 3);
    lb_contentLocation = new JLabel("Content Location");
    addCenterAlign(lb_contentLocation, 2, 3);
    contentlocCombo = new JComboBox();
    addCenterAlign(contentlocCombo, 3, 3);
    lb_brandSubGrp = new JLabel("Brand Sub Group");
    addLeftAlign(lb_brandSubGrp, 0, 4);
    brandSubGrpCombo = new JComboBox();
    addCenterAlign(brandSubGrpCombo, 1, 4);
    lb_fixedLocation = new JLabel("Fixed Location");
    addLeftAlign(lb_fixedLocation, 2, 4);
    fixedlocCombo  = new JComboBox();
    addCenterAlign(fixedlocCombo, 3, 4);
    lb_taxonomyValue = new JLabel("Taxonomy Value");
    addLeftAlign(lb_taxonomyValue, 0, 5);
    ef_taxonomyValue = new JTextField(10);
    addCenterAlign(ef_taxonomyValue, 1, 5);
    lb_taxonomyType  = new JLabel ("Taxonomy Type");
    addLeftAlign(lb_taxonomyType, 2, 5);
    taxonomyCombo = new JComboBox();
    addCenterAlign(taxonomyCombo, 3, 5);
    cb_subscribable = new JCheckBox("Subscribable");
    addLeftAlign(cb_subscribable, 0, 6);
    lb_subscriptionKey = new JLabel("Subscription Key");
    addCenterAlign(lb_Name, 2, 6);
    ef_subscriptionKey = new JTextField(10);
    addCenterAlign(ef_subscriptionKey, 3, 6);
    addControlButton();
}

public static void main(String[] args) {
    try {
        MultiEntryDlg dialog = new MultiEntryDlg();
        dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
        dialog.setVisible(true);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private void addControlButton() {
    // TODO Auto-generated method stub
    JPanel buttonPanel = new JPanel();
    buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
    getContentPane().add(buttonPanel,BorderLayout.SOUTH);
    pb_OK = new DButton(Str.getStr(STR_OK));
    pb_CANCEL = new DButton(Str.getStr(STR_CANCEL));

    pb_OK.addActionListener(this);
    pb_CANCEL.addActionListener(this);

    buttonPanel.add(pb_OK);
    buttonPanel.add(pb_CANCEL);

}

private void addLeftAlign (Component component , int x, int y){
    GridBagConstraints constraints = new GridBagConstraints();
    constraints.insets = new Insets(0, 0, 5, 5);
    constraints.anchor = GridBagConstraints.WEST;
    constraints.gridx = x;
    constraints.gridy = y;
    contentPanel.add(component, constraints);

}

private void addCenterAlign (Component component , int x ,int y){
    GridBagConstraints constraints = new GridBagConstraints();
    constraints.insets = new Insets(0, 0, 5, 0);
    constraints.anchor = GridBagConstraints.HORIZONTAL;
    constraints.gridx = x;
    constraints.gridy = y;
    contentPanel.add(component, constraints);
}

private void addMergeColumn (Component component , int x, int y, int weight){
    GridBagConstraints constraints = new GridBagConstraints();
    constraints.insets = new Insets(0, 0, 5, 5);
    constraints.anchor = GridBagConstraints.HORIZONTAL;
    constraints.gridx = x;
    constraints.gridy = y;
    constraints.gridwidth = weight;
    contentPanel.add(component, constraints);
}


private void initializeBasicProperty() {
    // TODO Auto-generated method stub
    setBounds(100, 100, 500, 250);
    getContentPane().setLayout(new BorderLayout());
    contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
    getContentPane().add(contentPanel, BorderLayout.CENTER);    
    GridBagLayout gbl_contentPanel = new GridBagLayout();
    gbl_contentPanel.columnWidths = new int[]{0, 0, 0};
    gbl_contentPanel.rowHeights = new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0};
    gbl_contentPanel.columnWeights = new double[]{0.0, 1.0, Double.MIN_VALUE};
    gbl_contentPanel.rowWeights = new double[]{0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, Double.MIN_VALUE};
    contentPanel.setLayout(gbl_contentPanel);
}
} 

Estoy recibiendo el siguiente error.

strArray in strObject is null. String Index:1  Language Ind:0
strArray in strObject is null. String Index:2  Language Ind:0
Exception in thread "main" java.lang.StackOverflowError
at com.ibm.nzna.projects.qit.gui.MultiEntryDlg.setVisible(MultiEntryDlg.java:523)
at com.ibm.nzna.projects.qit.gui.MultiEntryDlg.setVisible(MultiEntryDlg.java:523)
at com.ibm.nzna.projects.qit.gui.MultiEntryDlg.setVisible(MultiEntryDlg.java:523)
    etc..

¿Alguien podría ayudarme con este error?

Answer 1

Esto no responde a su pregunta directamente. Pero realmente no uses GridBagLayout ... es un LayoutManager loco. Mire la cantidad de código que necesita escribir para diseñar sus componentes. En mi opinión, esa es la razón por la cual muchas personas se alejaron de no escribir la aplicación Swing.

En su lugar, use el diseño del formulario Jgoodies. Aquí está: http://www.jgoodies.com/freeware/forms/

Si no has oído hablar de eso ... es un administrador de diseño muy simple. Puede especificar las especificaciones de columna y fila como cadenas simples. Puede usar PanelBuider o FormBuilder existente en la biblioteca o hacer uno propio. He hecho uno aquí:

http://code.google.com/p/swingobjects/source/browse/swingobjects/src/org/aesthete/swingobjects/view/swingobjformbuilder.java