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3. Using Objects

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

Class Periods: 13-15

AP CSA Exam Weighting: 5-7.5%

Unit 2 Table of Contents

• 3.1. Objects - Instances of Classes
  • 3.1.1. What are Objects and Classes?
  • 3.1.2. Intro to Objects with Turtles
  • 3.1.3. Creating Turtle Objects
  • 3.1.4. Programming Challenge : Turtle Drawing
  • 3.1.5. Summary
  • 3.1.6. AP Practice
• 3.2. Creating and Initializing Objects: Constructors
  • 3.2.1. Overloading Constructors
  • 3.2.2. The World Class Constructors
  • 3.2.3. The Turtle Class Constructors
  • 3.2.4. Object Variables and References
  • 3.2.5. Constructor Signatures
  • 3.2.6. Formal and Actual Parameters
  • 3.2.7. Programming Challenge: Custom Turtles
  • 3.2.8. Summary
  • 3.2.9. AP Practice
• 3.3. Calling Methods Without Parameters
  • 3.3.1. Procedural Abstraction
  • 3.3.2. Programming Challenge : Draw a Letter
  • 3.3.3. Summary
  • 3.3.4. AP Practice
• 3.4. Calling Methods With Parameters
  • 3.4.1. Tracing Methods
  • 3.4.2. Programming Challenge : Turtle House
  • 3.4.3. Summary
  • 3.4.4. AP Practice
• 3.5. Methods that Return Values
  • 3.5.1. Accessors / Getters
  • 3.5.2. Methods with Arguments and a Return Value
  • 3.5.3. Programming Challenge : Turtle Distances
  • 3.5.4. Summary
  • 3.5.5. AP Practice
• 3.6. Strings
  • 3.6.1. String Operators - Concatenation
  • 3.6.2. Programming Challenge : Mad Libs
  • 3.6.3. Summary
• 3.7. String Methods
  • 3.7.1. String Methods: length, substring, indexOf
  • 3.7.2. CompareTo and Equals
  • 3.7.3. Common Mistakes with Strings
  • 3.7.4. Programming Challenge : Pig Latin
  • 3.7.5. Summary
  • 3.7.6. String Methods Game
• 3.8. Wrapper Classes - Integer and Double
  • 3.8.1. Programming Challenge : Debugging
  • 3.8.2. Summary
• 3.9. Using the Math Class
  • 3.9.1. Programming Challenge : Random Numbers
  • 3.9.2. Summary
• 3.10. Unit 2 Summary
  • 3.10.1. Concept Summary
  • 3.10.2. Java Keyword Summary
  • 3.10.3. Vocabulary Practice
  • 3.10.4. Common Mistakes
• 3.11. Mixed Up Code Practice
• 3.12. Toggle Mixed Up or Write Code Practice
• 3.13. Coding Practice
• 3.14. Practice Test for Objects (2.1-2.5)
• 3.15. Multiple Choice Exercises
  • 3.15.1. Easier Multiple Choice Questions
  • 3.15.2. Medium Multiple Choice Questions
  • 3.15.3. Hard Multiple Choice Questions
• 3.16. Unit 2 Free Response Question (FRQ) Practice
  • 3.16.1. FRQ Description of Level Class
  • 3.16.2. FRQ Practice
• 3.17. Java Swing GUIs (optional)

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