Schwungfehler mit Gridbaglayout

Question

Ich schreibe ein Mutlientry -Dialogfeld mit dem Gridbag -Layout -Manager, wenn ich versuche, dieses Programm auszuführen, zeigt es mir einen seltsamen Fehler, dem ich nie begegnet bin.

 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);
}
} 

Ich bekomme einen folgenden Fehler.

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..

Könnte mir jemand bei diesem Fehler helfen?

Answer 1

Dies beantwortet Ihre Frage nicht direkt. Aber verwenden Sie wirklich keine Gridbaglayout. Es ist ein verrückter LayoutManager. Schauen Sie sich die Menge an Code an, die Sie zum Layout Ihrer Komponenten schreiben müssen. IMO, das ist der Grund, warum sich viele Menschen von der Nicht -Schreib -Swing -Anwendung entschieden haben.

Verwenden Sie stattdessen das Layout von Jgoodies Form. Hier ist es: http://www.jgoodies.com/freeware/forms/

Wenn Sie nichts davon gehört haben, ist es ein sehr einfacher Layout -Manager. Sie können die Spalten- und Zeilenspezifikationen als einfache Zeichenfolgen angeben. Sie können vorhandene Panelbuider oder Formenbuilder in der Bibliothek verwenden oder eine eigene machen. Ich habe hier einen gemacht:

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