1  import javax.swing.JFrame;

  2  

  3  public class CalculatorViewer

  4  {  

  5     public static void main(String[] args)

  6     {  

  7        JFrame frame = new CalculatorFrame();

  8        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  9        frame.setTitle("Calculator");

 10        frame.setVisible(true);

 11     }

 12  }