Question

Simple Java Notepad application using Swing GUI

Create a help menu with shortcut ctrl+H:
-Help menu includes two menu items: 1. About 2. Visit Homepage. Add a separator between these menu items.

1. Create a menu item which is About. Add a short cut for the menu item. It is ctrl+A.

-When a user clicks it (an action event occurs), display a show message dialog box. Display the message shown in the figure. Display information icon.

2. Create a menu item which is Visit Homepage. Add a short cut for the menu item. It is ctrl+V.

1. When a user clicks it (an action event occurs), the user will be navigated to http://www.microsoft.com.

2. For the navigation, create a static method (copy it):

public static void openWebpage (String urlString) { try {

Desktop.getDesktop().browse(new

URL(urlString).toURI()); }

catch (Exception e) { e.printStackTrace();

} }

-Then in the action performed method, call this static method and provide the url String.

-Set frame as 600*400.

MyNotepad File Edit Print Help About Ctri-A Visit Homepage Ctrl-V 国MyNotepad File Edit Print Help About iThis software is developed in 2019 Version is 1.0 OK

Answer 1

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.ActionListener;
import java.awt.Desktop;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;
import java.awt.Toolkit;
import java.net.URI;
import java.net.URL;
import javax.swing.JOptionPane;
public class MyNotepad extends JFrame implements ActionListener
{
JMenuBar menubar;
JMenu file,edit,print,help;
JMenuItem about,visit;
public MyNotepad()
{
setTitle("MyNotepad");
setSize(600,400);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//create menubar
menubar=new JMenuBar();
file=new JMenu("File");
menubar.add(file); //add menus to menubar
edit=new JMenu("Edit");
menubar.add(edit);
print=new JMenu("Print");
menubar.add(print);
help=new JMenu("Help");
//set the Mnemonic
help.setMnemonic('H');
about=new JMenuItem("About");
//set shortcut CTRL+H help
KeyStroke ctrl_A = KeyStroke.getKeyStroke(KeyEvent.VK_A, Toolkit.getDefaultToolkit ().getMenuShortcutKeyMask());
//set the accelerator
about.setAccelerator(ctrl_A);
about.addActionListener(this);
help.add(about);
help.addSeparator();
visit=new JMenuItem("Visit Homepage");
//set shortcut CTRL+V about
KeyStroke ctrl_V = KeyStroke.getKeyStroke(KeyEvent.VK_V, Toolkit.getDefaultToolkit ().getMenuShortcutKeyMask());
//set the accelerator
visit.setAccelerator(ctrl_V);
visit.addActionListener(this);
help.add(visit);
menubar.add(help);
setJMenuBar(menubar);
setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==about)
JOptionPane.showMessageDialog(this,"This software is developed in 2019\nVersion is 1.0","About",JOptionPane.INFORMATION_MESSAGE);   
else if(e.getSource()==visit)
{
try {
Desktop.getDesktop().browse(new URL("http://www.microsoft.com").toURI()); }
catch (Exception e1) { e1.printStackTrace();
}
}   
}
public static void main(String[] args)
{
new MyNotepad();
}
}
OUTPUT

p 3 )11:57 AM & koushikhp 800 MyNotepad File Edit Print Help About เข้ This software is developed in 20 Version is 1.0 ок