Reflection (Java) - create the class object

class Start
{
  public static void main( String[] argv ) 
  {
      int argc =argv.length;
      if ( argc == 0 ) {
          System.err.println( "error");
          return;
      }

      try 
      { 
          Class<?> c = Class.forName( argv[argv.length-1] );
          //c kowalski = c.newInstance( );   
      }
      catch ( Exception e ) { System.out.println(e) ; return; }
    }
}
class Test implements InfoInterface
{
    public void display()
    {
        System.out.println("HI!");      
    }
    static int w;
    public int dodawanie (int a, int b)
    {
        w=a+b;
        return w;
    }
}

**Hi, My problem is how to create the object of Test class in Start class? The Test class have to be add by commend line. In this program i have to get methods from Test class via object in Start class.

Some advice would be very hopeful. Thanks**