Java thread WAIT(400).. using NetBeans 6.0

Question

Hi everyone, can someone please help me! Im trying to make something look like a 'loading' bar but I cant
get this to wait(200)... like for ex:
I want to ProgressBar1, to load up like 10% and then wait 4 seconds, and load up to 40% but Im not sure how to wait! Look at my code below and please help:
Look at comments towards middle of the script!
Please help! -- Thanks
package my.numberaddition;
public class NumberAdditionUI extends javax.swing.JFrame{
public NumberAdditionUI() {
initComponents();
jTextField1.setText("");
jTextField2.setText("");
jTextField3.setText("");
private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
jTextField1.setText("");
jTextField2.setText("");
jTextField3.setText("");
jProgressBar1.setValue(0);
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
System.exit(0);
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
float num1,num2,result;
num1 = Float.parseFloat(jTextField1.getText());
num2 = Float.parseFloat(jTextField2.getText());
result = num1 + num2;
jTextField3.setText(String.valueOf(result));
jProgressBar1.setValue(40);
jLabel3.setText("Stablizing");
Thread.currentThread().sleep(4000); //This is where it should wait!
jLabel3.setText("Loading Graphics");
jProgressBar1.setValue(60);
Thread.currentThread().sleep(4000); //And here!
jProgressBar1.setValue(95);
jLabel3.setText("Loading..");
Thread.currentThread().sleep(2000; ///And finally here
jProgressBar1.setValue(100);
jLabel3.setText("Loaded");
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NumberAdditionUI().setVisible(true);
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JProgressBar jProgressBar1;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
private javax.swing.JTextField jTextField3;
// End of variables declaration
}

Answer 1

I want to ProgressBar1, to load up like 10% and then wait 4 seconds, and load up to 40%Why? Why not have it show the actual progress, in the actual time that it took?
In other words, just update the ProgressBar every time you get to a significant point. Forget the waiting, make the 'progress' instead.