1)Progress.java:

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

public class Progress{
 JFrame jf;
 JProgressBar jpb;
 Thread runner;
 int num = 0;
 Progress(){
  JFrame jf=new JFrame();
  jpb=new JProgressBar(0,100);
  jpb.setValue(0);
  jpb.setStringPainted(true);
  jpb.setString("Loading....");
  jf.add(jpb);
  jf.setSize(500,25);
  jf.setUndecorated(true);
  jf.setVisible(true);
  jf.setResizable(false);
  jf.setLocation(450,250);
 }
 public void iterate(){
  while (num < 1000){
   jpb.setValue(num);
   try{
    Thread.sleep(500);
   }
   catch (InterruptedException e){ }
   num += 10;
   if(num==100)
   new NextPage().setVisible(true);
   }
  }
 public static void main(String args[]){
  Progress p=new Progress();
  p.iterate();
 }
}

2)NextPage.java:

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

class NextPage extends JFrame
{
  NextPage()
   {
     setLayout(null);
     setDefaultCloseOperation(javax.swing. WindowConstants.DISPOSE_ON_CLOSE);
     JLabel lab=new JLabel("Welcome  ");
     lab.setBounds(10,10,500,20);
     add(lab);
     setSize(300, 100);
      }
 }

Thanx for your help.But i want the JProgressBar to disappear and only the JFrame of the file NextPage.java to be displayed on the screen. Please help!!!!!