Hi Friend,

Try the following code:

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

public class DateDifference extends JFrame implements ActionListener {

private JButton currentdate_button;
private JTextField currentdate_textfield;
private JTextField enterdate_textfield;

private JLabel jLabel1;
private JLabel jLabel2;
private JLabel jLabel3;
private JLabel jLabel4;
private JLabel jLabel5;
private JLabel jLabel6;
private JLabel jLabel7;
private JLabel jLabel8;
private JTextField result_day_textfield;
private JTextField result_hours_textfield;
private JTextField result_minutes_textfield;
private JTextField result_month_textfield;
private JTextField result_second_textfield;
private JTextField result_year_textfield;

public DateDifference() {
initComponents();
}
private void initComponents() {
jLabel1 = new JLabel();
currentdate_textfield = new JTextField();
enterdate_textfield = new JTextField();
currentdate_button = new JButton();
result_year_textfield = new JTextField();
result_month_textfield = new JTextField();
result_day_textfield = new JTextField();
result_hours_textfield = new JTextField();
result_minutes_textfield = new JTextField();
result_second_textfield = new JTextField();
jLabel2 = new JLabel();
jLabel3 = new JLabel();
jLabel4 = new JLabel();
jLabel5 = new JLabel();
jLabel6 = new JLabel();
jLabel7 = new JLabel();
jLabel8 = new JLabel();

setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setMinimumSize(new Dimension(500, 200));
getContentPane().setLayout(null);

jLabel1.setText("Enter Date(dd/MM/yyyy):");
getContentPane().add(jLabel1);
jLabel1.setBounds(80, 60, 140, 14);
getContentPane().add(currentdate_textfield);
currentdate_textfield.setBounds(260, 100, 190, 20);

SimpleDateFormat sdf = new SimpleDateFormat();
sdf.applyPattern("dd/MM/yyyy");
currentdate_textfield.setText(sdf.format(new Date()));

getContentPane().add(enterdate_textfield);
enterdate_textfield.setBounds(260, 60, 190, 20);

currentdate_button.setText("Cr Date");
currentdate_button.addActionListener(this);
getContentPane().add(currentdate_button);
currentdate_button.setBounds(70, 100, 100, 23);

getContentPane().add(result_year_textfield);
result_year_textfield.setBounds(160, 180, 160, 20);
getContentPane().add(result_month_textfield);
result_month_textfield.setBounds(160, 220, 160, 20);
getContentPane().add(result_day_textfield);
result_day_textfield.setBounds(160, 260, 160, 20);
getContentPane().add(result_hours_textfield);
result_hours_textfield.setBounds(160, 300, 160, 20);
getContentPane().add(result_minutes_textfield);
result_minutes_textfield.setBounds(160, 340, 160, 20);
getContentPane().add(result_second_textfield);
result_second_textfield.setBounds(160, 380, 160, 20);

jLabel2.setText("Years");
getContentPane().add(jLabel2);
jLabel2.setBounds(80, 180, 60, 14);

jLabel3.setText("Month");
getContentPane().add(jLabel3);
jLabel3.setBounds(80, 220, 60, 14);

jLabel4.setText("Day");
getContentPane().add(jLabel4);
jLabel4.setBounds(80, 260, 60, 14);

jLabel5.setText("Hours");
getContentPane().add(jLabel5);
jLabel5.setBounds(74, 300, 50, 14);

jLabel6.setText("Minutes");
getContentPane().add(jLabel6);
jLabel6.setBounds(64, 350, 60, 14);

jLabel7.setText("Second");
getContentPane().add(jLabel7);
jLabel7.setBounds(64, 390, 50, 14);

pack();
}

continue..........

public void actionPerformed(ActionEvent event) {
String current=currentdate_textfield.getText();
String enteredDate=enterdate_textfield.getText();
try{
SimpleDateFormat formatter1 = new SimpleDateFormat("dd/MM/yyyy");
Date d = formatter1.parse(enteredDate);
int y1=d.getYear();
int m1=d.getMonth()+1;
int day1=d.getDate();
//System.out.println(y1+" "+m1+" "+day1);
SimpleDateFormat formatter2 = new SimpleDateFormat("dd/MM/yyyy");
Date date1 = formatter2.parse(current);
int y2=date1.getYear();
int m2=date1.getMonth()+1;
int day2=date1.getDate();
//System.out.println(y2+" "+m2+" "+day2);
Calendar calendar1 = Calendar.getInstance();
Calendar calendar2 = Calendar.getInstance();
calendar1.set(y1,m1,day1);
calendar2.set(y2,m2,day2);
long milliseconds1 = calendar1.getTimeInMillis();
long milliseconds2 = calendar2.getTimeInMillis();
long diff = milliseconds2 - milliseconds1;
long diffSeconds = diff / 1000;
long diffMinutes = diff / (60 * 1000);
long diffHours = diff / (60 * 60 * 1000);
long diffDays = diff / (24 * 60 * 60 * 1000);
double d1=((double)milliseconds1)/(1000*60*60*24);
double d2=((double)milliseconds2)/(1000*60*60*24);
double difference=Math.round(Math.abs((d1-d2)/30));

System.out.println("Time in milliseconds: " + diff + " milliseconds.");
System.out.println("Time in seconds: " + diffSeconds + " seconds.");
System.out.println("Time in minutes: " + diffMinutes + " minutes.");
System.out.println("Time in hours: " + diffHours + " hours.");
System.out.println("Time in days: " + diffDays + " days.");
System.out.println("Time in Months: " +difference+ " months.");
}
catch(Exception e){}

}
public static void main(String args[]) {
EventQueue.invokeLater(new Runnable() {
public void run() {
new DateDifference().setVisible(true);
}
});
}
}

SplashScreen.java--------------

import javax.swing.*;

public class SplashScreen {
public static void main(String[] arg) {
JWindow window = new JWindow();
window.getContentPane().add(new JLabel("Loading JFrame...",SwingConstants.CENTER));
window.setBounds(200, 200, 200, 100);
window.setVisible(true);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}

window.setVisible(false);
JFrame frame=new JFrame();
frame.add(new JLabel("Welcome"));
frame.setVisible(true);
window.dispose();

}
}

For more examples,please visit the following link:
http://www.roseindia.net/java/example/java/swing/Print.shtml
http://www.roseindia.net/java/example/java/swing/SwingProgressBar.shtml

Thanks