我正在使用gridbag布局管理器编写一个mutlientry对话框，当我试图运行这个程序时，它向我展示了一些我从未遇到过的奇怪错误。
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);
}
}
我收到了以下错误。
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..
有人可以帮我解决这个错误吗？
答案 0 :(得分：0)
这不能直接回答您的问题。但是真的不要使用GridBagLayout ..它是一个疯狂的布局管理器。查看编写组件所需的代码量。 IMO，这就是为什么许多人不去写Swing应用程序的原因。
而是使用jgoodies表单布局。这是：http://www.jgoodies.com/freeware/forms/
如果您还没有听说过它...它是一个非常简单的布局管理器。您可以将列和行规范指定为简单字符串。您可以在库中使用现有的PanelBuider或FormBuilder，也可以自己创建一个。我在这里做了一个：