Pre-lab 3

Inheritance and Polymorphism

Goals

Practice with:

• user-defined classes in java
• overriding methods (toString(), equals())
• inheritance
• collection of objects in hierarchy
• polymorphic references
• arrays, and in particular arrays of Objects

Gain experience with:

• thinking carefully about good testing
• writing javadoc

• working with command-line arguments

  Tasks:

  Do the following tasks (click on the blue text below for descriptions):

  1. [PRELAB] Reflect on the testing done in last week's solutions.

  2. [PRELAB] Read through the introductionto the Shapes hierarchy carefully.

  3. Create the Triangle class.
  4. Create the IsoscelesTriangle class.
  5. Create a collection of Shapes.