Exercise all menu controls - Java Swing

Java examples for Swing:Menu

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Description

Exercise all menu controls

Demo Code

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

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

public class GameMenu extends JFrame {
  public static void main(String[] args) {
    new GameMenu();
  }/*from  w w  w  . j  av a 2  s  .  c om*/

  JMenuItem newItem, pauseItem, quitItem, exitItem;
  JCheckBoxMenuItem soundItem, musicItem;

  public GameMenu() {
    this.setSize(600, 400);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    this.setJMenuBar(buildMenu());

    this.setVisible(true);
  }

  private JMenuBar buildMenu() {
    MenuListener ml = new MenuListener();

    JMenuBar menuBar = new JMenuBar();

    JMenu gameMenu = new JMenu("Game");
    gameMenu.setMnemonic('G');
    menuBar.add(gameMenu);

    JMenu optionsMenu = new JMenu("Options");
    optionsMenu.setMnemonic('O');
    menuBar.add(optionsMenu);

    newItem = addItem(gameMenu, "New Game", 'N', 0, ml);
    pauseItem = addItem(gameMenu, "Pause Game", 'P', 0, ml);
    quitItem = addItem(gameMenu, "Quit Game", 'Q', 0, ml);
    gameMenu.addSeparator();
    exitItem = addItem(gameMenu, "Exit", 'x', 0, ml);

    soundItem = addOption(optionsMenu, "Sound", 'S', 0, ml);
    musicItem = addOption(optionsMenu, "Music", 'M', 0, ml);

    return menuBar;
  }

  private JMenuItem addItem(JMenu menu, String title, char key, int pos, ActionListener listener) {
    JMenuItem item = new JMenuItem(title, key);
    if (pos > 0)
      item.setDisplayedMnemonicIndex(pos);
    item.addActionListener(listener);
    menu.add(item);
    return item;
  }

  private JCheckBoxMenuItem addOption(JMenu menu, String title, char key, int pos, ActionListener listener) {
    JCheckBoxMenuItem item = new JCheckBoxMenuItem(title);
    item.setMnemonic(key);
    if (pos > 0)
      item.setDisplayedMnemonicIndex(pos);
    item.addActionListener(listener);
    menu.add(item);
    return item;
  }

  private class MenuListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      String name = ((JMenuItem) e.getSource()).getText();
      System.out.println(name);
      if (e.getSource() == exitItem)
        System.exit(0);
      else if (e.getSource() == pauseItem) {
        if (pauseItem.getText().equals("Pause Game")) {
          pauseItem.setText("Resume Game");
          pauseItem.setMnemonic('R');
          quitItem.setEnabled(false);
        } else {
          pauseItem.setText("Pause Game");
          pauseItem.setMnemonic('P');
          quitItem.setEnabled(true);
        }
      } else if (e.getSource() == musicItem) {
        if (musicItem.getState() == true)
          System.out.println("Your mamma can't dance.");
        else
          System.out.println("Your daddy can't rock and roll.");
      }
    }
  }
}

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