2. Using Objects

In this unit, you will learn how to create and use objects in Java.

Class Periods: 13-15

AP CS A Exam Weighting: 5-7.5%

Unit 2 Table of Contents

• 2.1. Objects - Instances of Classes
  • 2.1.1. Intro to Objects with Turtles
  • 2.1.2. What are Classes and Objects?
  • 2.1.3. Programming Challenge : Turtle Drawing
  • 2.1.4. Summary
• 2.2. Creating and Storing Objects: Constructors
  • 2.2.1. Calendar Example
  • 2.2.2. Programming Challenge : Debugging
  • 2.2.3. Summary
• 2.3. Calling Methods Without Parameters
  • 2.3.1. Programming Challenge : Draw a Letter
  • 2.3.2. Summary
• 2.4. Calling Methods With Parameters
  • 2.4.1. Programming Challenge : Turtle House
  • 2.4.2. Summary
• 2.5. Calling Methods that Return Values
  • 2.5.1. Programming Challenge : Turtle Distances
  • 2.5.2. Summary
• 2.6. Strings
  • 2.6.1. String Operators - Concatenation
  • 2.6.2. Programming Challenge : Mad Libs
  • 2.6.3. Summary
• 2.7. String Methods
  • 2.7.1. Common Mistakes
  • 2.7.2. Programming Challenge : Pig Latin
  • 2.7.3. Summary
• 2.8. Wrapper Classes - Integer and Double
  • 2.8.1. Programming Challenge : Debugging
  • 2.8.2. Summary
• 2.9. Using the Math Class
  • 2.9.1. Programming Challenge : Random Numbers
  • 2.9.2. Summary
• 2.10. Unit 2 Summary
  • 2.10.1. Concept Summary
  • 2.10.2. Java Keyword Summary
  • 2.10.3. Common Mistakes with Strings
• 2.11. Mixed Up Code Practice
• 2.12. Coding Practice
• 2.13. Multiple Choice Exercises
  • 2.13.1. Easier Multiple Choice Questions
  • 2.13.2. Medium Multiple Choice Questions
  • 2.13.3. Hard Multiple Choice Questions
• 2.14. Java Swing GUIs (optional)

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