Java Tutorial/Development/Desktop

Desktop Help Applications

   <source lang="java">

import java.awt.Desktop; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.net.URI; import javax.swing.JFileChooser; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; public class DesktopDemo {

 static Desktop desktop;
 public static void main(String[] args) {
   
   if (Desktop.isDesktopSupported()) {
     desktop = Desktop.getDesktop();
   } else {
     System.out.println("Desktop class is not supported");
     System.exit(1);
   }
   JMenuItem openItem = new JMenuItem("Open");
   JMenuItem editItem = new JMenuItem("Edit");
   JMenuItem printItem = new JMenuItem("Print");
   JMenuItem browseToItem = new JMenuItem("Go to www.jexp.ru");
   JMenuItem mailToItem = new JMenuItem("Email to a@java.ru");
   JMenu fileMenu = new JMenu("File");
   JMenu mailMenu = new JMenu("Email");
   JMenu browseMenu = new JMenu("Browser");
   
   openItem.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent e) {
       JFileChooser chooser = new JFileChooser();
       if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
         try {
           desktop.open(chooser.getSelectedFile().getAbsoluteFile());
         } catch (Exception ex) {
           ex.printStackTrace();
         }
       }
     }
   });
   fileMenu.add(openItem);
   
   editItem.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent e) {
       JFileChooser chooser = new JFileChooser();
       if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
         try {
           desktop.edit(chooser.getSelectedFile().getAbsoluteFile());
         } catch (Exception ex) {
           ex.printStackTrace();
         }
       }
     }
   });
   fileMenu.add(editItem);
   
   printItem.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent e) {
       JFileChooser chooser = new JFileChooser();
       if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
         try {
           desktop.print(chooser.getSelectedFile().getAbsoluteFile());
         } catch (Exception ex) {
           ex.printStackTrace();
         }
       }
     }
   });
   fileMenu.add(printItem);
   
   browseToItem.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent e) {
       try {
         URI browseURI = new URI("www.jexp.ru");
         desktop.browse(browseURI);
       } catch (Exception ex) {
         System.out.println(ex.getMessage());
       }
     }
   });
   browseMenu.add(browseToItem);
   mailToItem.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent e) {
       try {
         URI mailURI = new URI("mailto:support@java.ru");
         desktop.mail(mailURI);
       } catch (Exception ex) {
         System.out.println(ex.getMessage());
       }
     }
   });
   mailMenu.add(mailToItem);
   JMenuBar jMenuBar = new JMenuBar();
   jMenuBar.add(fileMenu);
   jMenuBar.add(browseMenu);
   jMenuBar.add(mailMenu);
   JFrame frame = new JFrame();
   frame.setTitle("Desktop Helper Applications");
   frame.setSize(300, 100);
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   frame.setJMenuBar(jMenuBar);
   frame.setVisible(true);
 }

}</source>

Invoke the default editor to edit a file

   <source lang="java">

import java.awt.Desktop; import java.io.File; import java.io.IOException; public class Test {

 public static void main(String[] a) {
   try {
     Desktop desktop = null;
     if (Desktop.isDesktopSupported()) {
       desktop = Desktop.getDesktop();
     }
      desktop.edit(new File("c:\\a.txt"));
   } catch (IOException ioe) {
     ioe.printStackTrace();
   }
 }

}</source>

Open a office word file with Java

   <source lang="java">

import java.awt.Desktop; import java.io.File; import java.io.IOException; public class Test {

 public static void main(String[] a) {
   try {
     Desktop desktop = null;
     if (Desktop.isDesktopSupported()) {
       desktop = Desktop.getDesktop();
     }
      desktop.open(new File("c:\\a.doc"));
   } catch (IOException ioe) {
     ioe.printStackTrace();
   }
 }

}</source>

Open Mail client

   <source lang="java">

import java.awt.Desktop; import java.io.IOException; import java.net.URI; public class Test {

 public static void main(String[] a)throws Exception {
     Desktop desktop = null;
     if (Desktop.isDesktopSupported()) {
       desktop = Desktop.getDesktop();
     }
      desktop.mail();
 }

}</source>

Send out email

   <source lang="java">

import java.awt.Desktop; import java.io.IOException; import java.net.URI; public class Test {

 public static void main(String[] a)throws Exception {
     Desktop desktop = null;
     if (Desktop.isDesktopSupported()) {
       desktop = Desktop.getDesktop();
     }
      desktop.mail("mailto", "a@a.net", null);
 }

}</source>

Using system default printer to print a file out

   <source lang="java">

import java.awt.Desktop; import java.io.File; import java.io.IOException; public class Test {

 public static void main(String[] a) {
   try {
     Desktop desktop = null;
     if (Desktop.isDesktopSupported()) {
       desktop = Desktop.getDesktop();
     }
      desktop.print(new File("c:\\a.txt"));
   } catch (IOException ioe) {
     ioe.printStackTrace();
   }
 }

}</source>

Using the Desktop class to launch a URL with default browser

   <source lang="java">

import java.awt.Desktop; import java.io.IOException; import java.net.URI; import java.net.URISyntaxException; public class UsingDesltopClassToLaunch {

 public static void main(String[] a) {
   try {
     URI uri = new URI("http://www.jexp.ru");
     Desktop desktop = null;
     if (Desktop.isDesktopSupported()) {
       desktop = Desktop.getDesktop();
     }
     if (desktop != null)
       desktop.browse(uri);
   } catch (IOException ioe) {
     ioe.printStackTrace();
   } catch (URISyntaxException use) {
     use.printStackTrace();
   }
 }

}</source>

Using the system default setting to open a file

   <source lang="java">

import java.awt.Desktop; import java.io.File; import java.io.IOException; public class Test {

 public static void main(String[] a) {
   try {
     Desktop desktop = null;
     if (Desktop.isDesktopSupported()) {
       desktop = Desktop.getDesktop();
     }
      desktop.open(new File("c:\\a.txt"));
   } catch (IOException ioe) {
     ioe.printStackTrace();
   }
 }

}</source>