Applied

• Code the instance variables, constructors, and methods of a class that defines an object.
• Code a class that creates objects from a user-defined class and then uses the methods of the objects to accomplish the required tasks.
• Code a class that contains static fields and methods, and call these fields and methods from other classes.
• Given the Java code for an application that uses any of the language elements presented in this chapter, explain what each statement in the application does.

Knowledge

• Describe the architecture commonly used for object-oriented programs.
• Describe the concept of encapsulation and explain its importance to object-oriented programming.
• Differentiate between an object's identity and its state.
• Describe the basic components of a class.
• Explain what an instance variable is.
• Explain when a default constructor is used and what it does.
• Describe a signature of a constructor or method, and explain what overloading means.
• List four ways you can use the this keyword within a class definition.
• Explain the difference between how primitive types an reference types are passed to a method
• Explain how static fields and static methods differ from instance variables and regular methods.
• Explain what a static initialization block is and when it's executed.