Listings

• Listing 1. The new setMessageColor method.
• Listing 2. The modified addMessage method.
• Listing 3. Beginning of the Prob04Runner class.
• Listing 4. Beginning of the anonymous listener class.
• Listing 5. Add a turtle to the world.
• Listing 6. Not the first click.
• Listing 7. Process odd or even clicks.
• Listing 8. Cause the program to terminate properly.
• Listing 9. Source code for the program named Prob04 .
• Listing 10. Modified World class .
• Listing 11. Modified SimplePicture class .