1  import javax.swing.JOptionPane;

  2  

  3  /**

  4     This program demonstrates the use of option panes for 

  5     input and output.

  6  */

  7  public class OptionPaneDemo 

  8  {

  9     public static void main(String[] args)

 10     {

 11        String input = JOptionPane.showInputDialog("Enter price:");

 12        double price = Double.parseDouble(input);

 13        final double TAX_RATE = 8.5;

 14        price = price * (1 + TAX_RATE / 100);

 15        JOptionPane.showMessageDialog(null, "Price after tax: " + price);

 16     }

 17  }