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  }