import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
class AboutDialog extends JDialog {
public AboutDialog() {
setTitle("About");
setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));
add(Box.createRigidArea(new Dimension(0, 10)));
JLabel name = new JLabel("Notes");
name.setAlignmentX(0.5f);
add(name);
add(Box.createRigidArea(new Dimension(0, 100)));
JButton close = new JButton("Close");
close.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
dispose();
}
});
close.setAlignmentX(0.5f);
add(close);
setModalityType(ModalityType.APPLICATION_MODAL);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
setSize(300, 200);
}
}
public class SimpleDialog {
public static void main(String[] args) {
JMenuBar menubar = new JMenuBar();
JMenu file = new JMenu("File");
file.setMnemonic(KeyEvent.VK_F);
JMenu help = new JMenu("Help");
help.setMnemonic(KeyEvent.VK_H);
JMenuItem about = new JMenuItem("About");
help.add(about);
about.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
AboutDialog ad = new AboutDialog();
ad.setVisible(true);
}
});
menubar.add(file);
menubar.add(help);
JFrame f = new JFrame();
f.setJMenuBar(menubar);
f.setSize(300, 200);
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
}