INF1B: Week 7: Refactoring; Inheritance

Week Highlights

By the end of this week, you should understand:

From Lecture 12 and the demo:

• What refactoring techniques are why they are helpful for writing good code

From Lecture 13: 

• What UML diagrams are and how they are structured
• What inheritance is and how it can be helpful
• How the subclass relationship works, and how to use the ‘is-a’ test to see if one class is a subclass of another
• What the protected access modifier does
• How subclasses can override inherited methods
• How to design an inheritance hierarchy
• The Object class 

Lecture 12: Refactoring

• Slides: Lecture 12 Slides

Lecture 12 ➡ See last slide

Lecture 13: Inheritance A

• Slides: Lecture 13 Slides

Lecture 13 ➡ Objects First: read Chapter 10. Improving Structure with Inheritance, stopping at 10.7 Subtyping for now

Tutorial: Assignment 2 Part 1: cohort-level feedback

This is cohort-level feedback based on general trends.

Lab exercises

This week's lab exercises cover collection classes, packages and file I/O. There are three warmup exercises, three core exercises, and one optional exercise.

What should I be doing with assessment?

Assignment 2 is released on Monday.  You should get started on this as soon as possible because you will need to submit your first draft at the end of next week.