Listing 1. Source code for the program named Alice0150a.

Alice0150a's Code Created by: Dick Baldwin world Methods   public void main ( ) {             // Copyright 2007 R.G.Baldwin   // The real purpose of this program is to define and   // save a new class named SpinningHare.a2c   // This class adds a method named spin to the standard   // Hare class. Objects of this class can be created   // and added to a world by importing the class   // from the File menu.   hare .move( BACKWARD , 0.5 meters );   hare.spin ( numberRevs = 10 , duration = 10 );   hare .move( FORWARD , 0.5 meters );   } hare Methods   public void spin ( Number numberRevs, Number duration) {             // This method is added to the Hare class to create   // a new class named SpinningHare.   hare .turn( LEFT , numberRevs revolutions ); duration = duration seconds   }