1. GridWorld Case Study Part 4 Classes that Extend the Critter Interface A Summary by Jim Mims

2. Contents Introduction Part 1: Observing and Experimenting with GridWorld Part 2: Bug Variations Part 3: GridWorld Classes and Interfaces Part 4: Classes that Extend the Critter Class Part 5: Grid Data Structures

3. Introduction The case study provides a graphical environment where visual objects inhabit and interact in a two-dimensional grid. Students design and creator actor objects, add them to a grid, and determine whether they behave according to specifications.

4. Classes and Interfaces: Relationships