Listen to JMenu Events with a ChangeListener in Java
Description
The following code shows how to listen to JMenu Events with a ChangeListener.
Example
//from w w w.j a v a 2 s . co m
import java.awt.event.KeyEvent;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class Main {
public static void main(final String args[]) {
JFrame frame = new JFrame("MenuSample Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JMenuBar menuBar = new JMenuBar();
// File Menu, F - Mnemonic
JMenu fileMenu = new JMenu("File");
fileMenu.setMnemonic(KeyEvent.VK_F);
menuBar.add(fileMenu);
fileMenu.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
System.out.println("File Menu Changed");
}
});
// File->New, N - Mnemonic
JMenuItem newMenuItem = new JMenuItem("New");
fileMenu.add(newMenuItem);
newMenuItem.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
System.out.println("new menu item changed");
}
});
frame.setJMenuBar(menuBar);
frame.setSize(350, 250);
frame.setVisible(true);
}
}
The code above generates the following result.
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