      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  }