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我有這樣的Java代碼：在異常線程 「AWT-EventQueue的-0」 java.awt.IllegalComponentStateException：幀是可顯示的
Editor()
{
javax.swing.SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
// Create Menu
JMenuBar menuBar = drawMenu();
frame.setJMenuBar(menuBar);
frame.setUndecorated(true);
frame.add(desktop, BorderLayout.CENTER);
frame.add(toolbar,BorderLayout.NORTH);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
frame.getRootPane().setWindowDecorationStyle(JRootPane.INFORMATION_DIALOG);
frame.setTitle("JIL");
frame.pack();
frame.setVisible(true);
}
});
}
public JMenuBar drawMenu()
{
// Create the menu bar
JMenuBar menuBar = new JMenuBar();
// Create a menu
JMenu file = new JMenu("File");
JMenu edit = new JMenu("Edit");
JMenu run = new JMenu("Build");
JMenu help = new JMenu("Help");
menuBar.add(file);
menuBar.add(edit);
menuBar.add(run);
menuBar.add(help);
JMenu _new = new JMenu("New");
file.add(_new);
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
JButton clsbutton=new JButton(new ImageIcon (classLoader.getResource ("img/cls.jpg")));
clsbutton.setSize(2, 2);
clsbutton.setToolTipText("New Class");
toolbar.add(clsbutton);
clsbutton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
new newClass();
}
});
}
newClass()
{
contentPanelC.removeAll();
getContentPane().removeAll();
setTitle("New Class");
setBounds(100, 100, 470, 400);
getContentPane().setLayout(new BorderLayout());
contentPanelC.setBorder(new EmptyBorder(5, 5, 5, 5));
getContentPane().add(contentPanelC, BorderLayout.CENTER);
contentPanelC.setLayout(null);
JLabel lblNewLabel = new JLabel("Class Name");
lblNewLabel.setBounds(50, 51, 120, 17);
contentPanelC.add(lblNewLabel);
contentPanelC.revalidate();
contentPanelC.repaint();
textField = new JTextField();
textField.setBounds(170, 51, 228, 20);
contentPanelC.add(textField);
contentPanelC.revalidate();
contentPanelC.repaint();
textField.setColumns(10);
textField.setText(null);
textField.revalidate();
textField.repaint();
String fnam=textField.getText();
System.out.println("Initial value TextField: "+fnam);
JLabel lblNewLabel_1 = new JLabel("Location");
lblNewLabel_1.setBounds(50, 111, 120, 17);
contentPanelC.add(lblNewLabel_1);
contentPanelC.revalidate();
contentPanelC.repaint();
textField_1 = new JTextField();
textField_1.setBounds(170, 111, 131, 20);
contentPanelC.add(textField_1);
contentPanelC.revalidate();
contentPanelC.repaint();
textField_1.setColumns(10);
textField_1.setText(null);
textField_1.revalidate();
textField_1.repaint();
final JButton btnNewButton = new JButton("Browse");
btnNewButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
String workingdir = System.getProperty("user.dir");
chooser = new JFileChooser(new File(workingdir));
chooser.setDialogTitle("Select Location");
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
chooser.setAcceptAllFileFilterUsed(false);
if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION)
{
File selectedFile = chooser.getSelectedFile();
System.out.println(selectedFile.getName());
textField_1.setText(selectedFile.getPath());
}
else
{
System.out.println("No Selection ");
}
btnNewButton.revalidate();
}
});
btnNewButton.setBounds(320, 111, 89, 20);
contentPanelC.add(btnNewButton);
contentPanelC.revalidate();
contentPanelC.repaint();
{
JPanel buttonPaneC = new JPanel();
buttonPaneC.removeAll();
buttonPaneC.setLayout(new FlowLayout(FlowLayout.RIGHT));
getContentPane().add(buttonPaneC, BorderLayout.SOUTH);
{
final JButton okButton = new JButton("Ok");
okButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
{
// some file operations
}
textField.setText("");
textField.revalidate();
textField.repaint();
textField_1.setText("");
textField_1.revalidate();
textField_1.repaint();
dispose();
}
});
okButton.setActionCommand("Ok");
buttonPaneC.add(okButton);
buttonPaneC.revalidate();
buttonPaneC.repaint();
getRootPane().setDefaultButton(okButton);
}
{
final JButton cancelButton = new JButton("Cancel");
cancelButton.setActionCommand("Cancel");
buttonPaneC.add(cancelButton);
buttonPaneC.revalidate();
buttonPaneC.repaint();
contentPanelC.validate();
contentPanelC.repaint();
cancelButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
dispose();
}
});
}
}
setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
setVisible(true);
contentPanelC.validate();
contentPanelC.repaint();}}
所有時間該代碼產生以下情況除外：
Exception in thread "AWT-EventQueue-0" java.awt.IllegalComponentStateException: The frame is displayable.
at java.awt.Frame.setUndecorated(Frame.java:825)
at Editor$1.run(Editor.java:93)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:673)
at java.awt.EventQueue.access$300(EventQueue.java:96)
at java.awt.EventQueue$2.run(EventQueue.java:634)
at java.awt.EventQueue$2.run(EventQueue.java:632)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:105)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:643)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)
我已經盡力了。這是什麼？ 即使此控件在控制檯中顯示，也會顯示輸出窗口。但是當我試圖調試代碼時，這會遇到麻煩。我已經看到了這個。但沒有找到解決辦法。有人請幫助我。
我試過了。但同樣的例外！ – Salini