import java.awt.*;
import java.util.*;
import java.text.*;
import javax.swing.*;
import java.awt.event.*;
class  CalculateAge{

    public static void main(String[] args){
    JFrame f=new JFrame();
    JLabel label1=new JLabel("Enter Date Of Birth: ");
    JLabel label2=new JLabel("Age: ");
    final JTextField text1=new JTextField(20);
    final JTextField text2=new JTextField(20);

    JButton button=new JButton("Calculate");
        button.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent e){
                   try{
                   String dateOfBirth=text1.getText();
                   Date d=new Date();
                   SimpleDateFormat sdf=new SimpleDateFormat("MM-dd-yyyy");
                   String currentDate=sdf.format(d);

      Calendar cal1 = new GregorianCalendar();
      Calendar cal2 = new GregorianCalendar();
      int age = 0;
      int factor = 0; 
      Date date1 = new SimpleDateFormat("MM-dd-yyyy").parse(dateOfBirth);
      Date date2 = new SimpleDateFormat("MM-dd-yyyy").parse(currentDate);
      cal1.setTime(date1);
      cal2.setTime(date2);
      if(cal2.get(Calendar.DAY_OF_YEAR) < cal1.get(Calendar.DAY_OF_YEAR)) {
            factor = -1; 
      }
      age = cal2.get(Calendar.YEAR) - cal1.get(Calendar.YEAR) + factor;
      text2.setText(Integer.toString(age));
                   }
                   catch(Exception ex){}
               }
            });
        JPanel p=new JPanel(new GridLayout(3,2));
        p.add(label1);
        p.add(text1);
        p.add(label2);
        p.add(text2);
        p.add(button);

        f.add(p);
        f.setVisible(true);
        f.pack();
    }
}