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

public class Example extends JFrame implements ActionListener 
{  private JLabel nameJLabel, ageJLabel; 
   private JTextField nameJTextField, ageJTextField, totalResultJTextField;
   private JButton calculateJButton;
   public Example() 
   {  Container contentPane = getContentPane(); 
      contentPane.setLayout( null );            
      nameJLabel = new JLabel();             
      nameJLabel.setText( "Please enter your name: " );
      nameJLabel.setBounds( 16, 16, 160, 21 );
      contentPane.add( nameJLabel );
      nameJTextField = new JTextField(); 
      nameJTextField.setBounds( 170, 16, 70, 21 );
      nameJTextField.setHorizontalAlignment( JTextField.RIGHT );
      nameJTextField.setText("Laura"); 
      contentPane.add( nameJTextField );
      ageJLabel = new JLabel(); 
      ageJLabel.setText( "How old are you (in years)?" );
      ageJLabel.setBounds( 16, 48, 164, 21 );
      contentPane.add( ageJLabel );
      ageJTextField = new JTextField(); 
      ageJTextField.setText( "8" );
      ageJTextField.setBounds( 200, 48, 40, 21 );
      ageJTextField.setHorizontalAlignment( JTextField.RIGHT );
      contentPane.add( ageJTextField );
      totalResultJTextField = new JTextField(); 
      totalResultJTextField.setBounds( 244, 16, 186, 21 );
      totalResultJTextField.setHorizontalAlignment( JTextField.RIGHT );
      totalResultJTextField.setEditable( false ); 
      contentPane.add( totalResultJTextField );
      calculateJButton = new JButton(); 
      calculateJButton.setText( "Calculate Total" );
      calculateJButton.setBounds( 304, 48, 126, 24 );
      contentPane.add( calculateJButton ); 
      calculateJButton.addActionListener( this ); 
      setTitle( "Inventory" );
      setSize( 454, 132 );    
      setVisible( true );     
   } 
   public void actionPerformed(ActionEvent e) 
   {  String name = this.nameJTextField.getText(), age = this.ageJTextField.getText(); 
      this.totalResultJTextField.setText( name + " you will be " + (Integer.parseInt(age) + 1) + " next year."); 

   }
   public static void main( String[] args ) 
   {  Example application = new Example();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
   }
}