Java Swing Tutorial - Java JMenuItem(String text, int mnemonic) Constructor








Syntax

JMenuItem(String text, int mnemonic) constructor from JMenuItem has the following syntax.

public JMenuItem(String text,   int mnemonic)

Example

In the following code shows how to use JMenuItem.JMenuItem(String text, int mnemonic) constructor.

//from  w  w  w. ja v  a 2s  . com
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.AbstractButton;
import javax.swing.Icon;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

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");
    menuBar.add(fileMenu);

    // File->New, N - Mnemonic
    JMenuItem newMenuItem = new JMenuItem("New", KeyEvent.VK_N);
    fileMenu.add(newMenuItem);

    JCheckBoxMenuItem caseMenuItem = new JCheckBoxMenuItem("Case Sensitive");
    caseMenuItem.setMnemonic(KeyEvent.VK_C);
    fileMenu.add(caseMenuItem);

    ActionListener aListener = new ActionListener() {
      public void actionPerformed(ActionEvent event) {
        AbstractButton aButton = (AbstractButton) event.getSource();
        boolean selected = aButton.getModel().isSelected();
        String newLabel;
        if (selected) {
          newLabel = "A";
        } else {
          newLabel = "B";
        }
        aButton.setText(newLabel);
      }
    };

    caseMenuItem.addActionListener(aListener);
    frame.setJMenuBar(menuBar);
    frame.setSize(350, 250);
    frame.setVisible(true);
  }
}