Altalena Errore con GridBagLayout

Question

Sto scrivendo una finestra di dialogo mutlientry utilizzando il gestore di layout GridBag, quando sto cercando di eseguire questo programma che mi sta mostrando qualche errore di strano che non ho mai incontrato.

 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);
}
} 

sto ottenendo seguente errore.

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..

Qualcuno potrebbe aiutarmi con questo errore?

Answer 1

Questo non risponde direttamente alla tua domanda. Ma in realtà non utilizzare GridBagLayout .. il suo un LayoutManager folle. Guardate la quantità di codice è necessario scrivere al layout i componenti. IMO, questo è il motivo per cui molte persone si sono spostate lontano da non scrivere applicazioni Swing.

Invece di utilizzare il layout modulo JGoodies. Eccolo: http://www.jgoodies.com/freeware/forms/

Se non avete sentito parlare .. è molto semplice gestore di layout. È possibile specificare le specifiche colonna e riga come stringhe semplici. È possibile utilizzare PanelBuider o FormBuilder esistente nella biblioteca o fare uno proprio. Ho fatto uno qui:

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