Java Swing Tutorial - Java JMenu.isTopLevelMenu()

Syntax

JMenu.isTopLevelMenu() has the following syntax.

public boolean isTopLevelMenu()

Example

In the following code shows how to use JMenu.isTopLevelMenu() method.

/*from   w w w.j  a  v a2  s .  c om*/
import java.awt.ComponentOrientation;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JSeparator;

public class Main extends JFrame {
  public Main() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JMenuBar bar = new JMenuBar();
    JMenu menu = new JMenu("File");
    ComponentOrientation ori = ComponentOrientation.LEFT_TO_RIGHT;
    
    menu.applyComponentOrientation(ori);
    bar.add(menu);

    menu.add(new JMenuItem("Close"));
    menu.add(new JSeparator()); // SEPARATOR
    menu.add(new JMenuItem("Exit"));
    
    setJMenuBar(bar);
    add(new JLabel("A placeholder"));

    pack();
    setSize(300, 300);
    setVisible(true);
    
    menu.isTopLevelMenu();
  }

  public static void main(String arg[]) {
    new Main();
  }
}