Java Swing Tutorial - Java JMenu.getMenuComponentCount()

Syntax

JMenu.getMenuComponentCount() has the following syntax.

public int getMenuComponentCount()

Example

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

/*www.  ja  va2s  .  c  o m*/
import java.awt.Component;
import java.awt.ComponentOrientation;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;

public class Main extends JFrame {

  public Main() {
    super("Main");

    Container contentPane = getContentPane();
    contentPane.setLayout(new FlowLayout());
    contentPane.add(new JButton("OK"));
    contentPane.add(new JButton("Cancel"));

    applyOrientation(this, ComponentOrientation.RIGHT_TO_LEFT);
  }

  public static void main(String[] argv) {
    JFrame frame = new Main();
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });

    frame.pack();
    frame.setVisible(true);
  }
  private void applyOrientation(Component c, ComponentOrientation o) {
    c.setComponentOrientation(o);

    if (c instanceof JMenu) {
      JMenu menu = (JMenu) c;
      int ncomponents = menu.getMenuComponentCount();
      for (int i = 0; i < ncomponents; ++i) {
        applyOrientation(menu.getMenuComponent(i), o);
      }
    } else if (c instanceof Container) {
      Container container = (Container) c;
      int ncomponents = container.getComponentCount();
      for (int i = 0; i < ncomponents; ++i) {
        applyOrientation(container.getComponent(i), o);
      }
    }
  }
}