我有一个名为“Menu_Project”的框架。
我有另一个名为“Main_Menu”的框架,其中有一个 JButton,单击该按钮后,我想在 JDesktopPane 中调用框架“Menu_Project”。我尝试在此链接上关注 YouTube 上的教程:https ://www.youtube.com/watch?v=TUL3qEoZkR4
当我运行它时,我得到:
" Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: adding a window to a container"
我的代码:
import java.awt.BorderLayout;
public class Menu extends JFrame {
private JPanel contentPane;
private JDesktopPane desktopPane;
private JButton btnNewButton;
private Menu_Modifications_Single m1; //The Frame to be added
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Menu frame = new Menu();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public Menu() {
initComponents();
createEvents();
}
private void initComponents(){
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 1706, 995);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
btnNewButton = new JButton("Analyze Single");
desktopPane = new JDesktopPane();
desktopPane.setBackground(SystemColor.window);
GroupLayout gl_contentPane = new GroupLayout(contentPane);
gl_contentPane.setHorizontalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(Alignment.TRAILING, gl_contentPane.createSequentialGroup()
.addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(desktopPane, GroupLayout.PREFERRED_SIZE, 1597, GroupLayout.PREFERRED_SIZE))
.addGroup(gl_contentPane.createSequentialGroup()
.addContainerGap()
.addComponent(btnNewButton)
.addContainerGap(1496, Short.MAX_VALUE))
);
gl_contentPane.setVerticalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addComponent(btnNewButton)
.addGap(18)
.addComponent(desktopPane, GroupLayout.DEFAULT_SIZE, 823, Short.MAX_VALUE))
);
GroupLayout gl_desktopPane = new GroupLayout(desktopPane);
gl_desktopPane.setHorizontalGroup(
gl_desktopPane.createParallelGroup(Alignment.LEADING)
.addGap(0, 1597, Short.MAX_VALUE)
);
gl_desktopPane.setVerticalGroup(
gl_desktopPane.createParallelGroup(Alignment.LEADING)
.addGap(0, 823, Short.MAX_VALUE)
);
desktopPane.setLayout(gl_desktopPane);
contentPane.setLayout(gl_contentPane);
}
private void createEvents(){
btnNewButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(m1==null){
m1 = new Menu_Modifications_Single();
desktopPane.add(m1);
}
}
});
}
}
任何人都可以指出哪里错了。我正在关注视频教程。