New Features of Java 6.0

• New Methods in File class
• Splash Screen at startup
• Launching desktop application from Java
• Hooking application to Taskbar
• Conclusion

New Methods in File Class

long   getTotalSpace()
long   getFreeSpace()
long   getUsableSpace()

boolean   setReadable( boolean)
boolean   setWritable( boolean)
boolean   setExecutable( boolean)

import java.io.*;
public class  DiskSpace {
  public static void main(String args[]) {
   File f = new File(args[0]);

   System.out.printf("Total Space    : %d  MB\n", f.getTotalSpace() / (1024 * 1024) );
   System.out.printf("Available Space: %d  MB\n", f.getFreeSpace() / (1024 * 1024) );
  }
}

Splash Screen At Startup

import javax.swing.*;
public class  ShowSplash  extends JFrame
{
     public static void main(String args[])  throws Exception
	 {
	      Thread.sleep(1000);
	      ShowSplash f = new ShowSplash();
	      f.setSize(200,200);
	      f.setTitle("Splash Demo");
	      f.setVisible(true);
	      f.setDefaultCloseOperation( EXIT_ON_CLOSE);
      }
}

java -splash:logo.gif  ShowSplash

Launching desktop applications from Java

void browse (URI )
void edit (File)
void mail()
void open (File)
void print (File)

import java.awt.*;
import java.net.*;
import java.io.*;

public class DesktopDemo
{
   public static void main(String args[])  throws Exception
   {
     Desktop d = Desktop.getDesktop();  // get desktop object

     if ( args[0].equals("b"))  // invoke browser
          d.browse( new URI(args[1]));
     else
       if ( args[0].equals("e"))
          d.edit( new File(args[1]) );
       else
          if ( args[0].equals("o"))
          d.open( new File(args[1]) );
       else
          d.print( new File(args[1]));
   }
}

 java DesktopDemo b readme.html

Hooking application to Taskbar

1. Get SystemTray object using getSystemTray() method of SystemTray class.
2. Create an object of TrayIcon and associate an image, popup menu and title with that. Image is displayed in the tray, popup menu is displayed when user clicks on image with right button. Title is displayed as a tooltip when user moves mouse pointer on image.
3. Add TrayIcon object to SystemTray object.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class  SystemTrayDemo
{
 public static void main(String args[])  throws Exception
 {
   TrayIcon trayIcon = null;

   SystemTray tray = SystemTray.getSystemTray();
   // load an image
   Image image = Toolkit.getDefaultToolkit().getImage("HOMELOGO.JPG");
   ActionListener listener = new ActionListener() {
             public void actionPerformed(ActionEvent e)
             {
               JOptionPane.showMessageDialog(null,"Srikanth Technologies","Title",JOptionPane.INFORMATION_MESSAGE);
             }
         };


   // create a popup menu
   PopupMenu popup = new PopupMenu();
   // create menu item for the default action
   MenuItem defaultItem = new MenuItem("Srikanth Technologies");
   MenuItem closeItem = new MenuItem("Close");
   closeItem.addActionListener( new ActionListener() {
             public void actionPerformed(ActionEvent e)
             {

                System.exit(0);
             }
         });


   defaultItem.addActionListener(listener);
   popup.add(defaultItem);
   popup.add(closeItem);

   trayIcon = new TrayIcon(image, "Srikanth Technologies", popup);
   trayIcon.setImageAutoSize(true);
   trayIcon.addActionListener(listener);
   tray.add(trayIcon);
  }

}

Conclusion