A simple example of constructing and using menus.
/*
Java Swing, 2nd Edition
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
ISBN: 0-596-00408-7
Publisher: O'Reilly
*/
// MenuExample.java
// A simple example of constructing and using menus.
//
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JTextPane;
import javax.swing.border.BevelBorder;
public class MenuExample extends JPanel {
public JTextPane pane;
public JMenuBar menuBar;
public MenuExample() {
menuBar = new JMenuBar();
JMenu formatMenu = new JMenu("Justify");
formatMenu.setMnemonic('J');
MenuAction leftJustifyAction = new MenuAction("Left", new ImageIcon(
"1.gif"));
MenuAction rightJustifyAction = new MenuAction("Right", new ImageIcon(
"2.gif"));
MenuAction centerJustifyAction = new MenuAction("Center",
new ImageIcon("3.gif"));
MenuAction fullJustifyAction = new MenuAction("Full", new ImageIcon(
"4.gif"));
JMenuItem item;
item = formatMenu.add(leftJustifyAction);
item.setMnemonic('L');
item = formatMenu.add(rightJustifyAction);
item.setMnemonic('R');
item = formatMenu.add(centerJustifyAction);
item.setMnemonic('C');
item = formatMenu.add(fullJustifyAction);
item.setMnemonic('F');
menuBar.add(formatMenu);
menuBar.setBorder(new BevelBorder(BevelBorder.RAISED));
}
class MenuAction extends AbstractAction {
public MenuAction(String text, Icon icon) {
super(text, icon);
}
public void actionPerformed(ActionEvent e) {
try {
pane.getStyledDocument().insertString(0,
"Action [" + e.getActionCommand() + "] performed!\n",
null);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
public static void main(String s[]) {
MenuExample example = new MenuExample();
example.pane = new JTextPane();
example.pane.setPreferredSize(new Dimension(250, 250));
example.pane.setBorder(new BevelBorder(BevelBorder.LOWERED));
JFrame frame = new JFrame("Menu Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setJMenuBar(example.menuBar);
frame.getContentPane().add(example.pane, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
}
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