public class Output2
{

   /* -------------------------------------------------------
      Pass information out of method with CLASS variable
      ------------------------------------------------------- */
   public static double out;


   public static void Square( double x )                
   {
      out = x * x;    // Store the result in CLASS var "out"
   }

   public static void main( String[] args )
   {
      double a, b;

      a = 4.0;
      Square( a );   // The return value is saved in CLASS var out
      b = out;       // Get the result !

      System.out.println( b) ;
   }
}