import javax.swing.*;
  
public class tester
{

  public static void main(String[] args)
  {

     Stuff Data = new Stuff();

     int myValue=0;

     while(myValue != -1)
     {

        String myInput = JOptionPane.showInputDialog(null,
            "Enter in number to store", "",
            JOptionPane.QUESTION_MESSAGE);
        myValue = Integer.parseInt(myInput);

        if (myValue != -1)
        {
           Data.addNew(myValue);
        }

     }

     JOptionPane.showMessageDialog(null,"The weighted average is"+
        Data.weightedaverage(),"",JOptionPane.INFORMATION_MESSAGE);

  }

}