Unit #2-03

Learning Outcome

At the end of this lesson, you will be able to:

• understand and use methods and fields in a class

Review

• property members

Lesson

• read "Using OOP", Chapter 8, Computer Based Problem Solving

  • read "Methods" & "Fields"

Activity

• go over Bicycle Class example:

  • Bicycle Example - TypeScript

  • Bicycle Example - Java

Daily Assignment

• continue to re-create the MrCoxallStack from last time:

  • add an isEmpty() getter

    • it returns a boolean "true" if it is empty

  • add a size() getter

    • it returns an integer value of the number of elements in the stack

  • now make sure your program & class are crash proof

    • if you ask stack to pop and it has no values, does it error?

    • make your MrCoxallStack can not die when anything happens to it

      • there are several things it could do

        • if the stack is empty, should you be able to show it?

        • if it is empty, what happens if you "pop()" something?

          • what should you get back?

        • anything else you can think of that will make your class "bullet proof" so that you will never get a runtime error

Extra

• do the above in a second language