lec3-1

Use inheritance in creating classes
Explain what is meant by "overriding a method"
Make use of super reference to call a parent method from within a method that overrides it
Explain the role of the Object class
Explain how automatic type promotion works with object references
Override the equals() and toString() methods for user defined classes
Explain the relationship between a reference type and the type of the object to which the reference points
Explain the concept of polymorphism/dynamic binding
Identify legal and illegal assignments of references to objects based on the reference type and object type
Explain what it means for a class to implement an interface
Use the protected modifier in defining an inheritance hierarchy
Describe when to use an abstract class

Note taking requirement

Don't forget to submit your notes in Canvas prior to classtime.

What is the relationship between the reference type and object type?
Consider the JavaFX class diagram. What reference type could be used to point to any object type in the diagram?
How does the reference type determine what methods can be called (if at all)?
How does the object type determine what methods can be called (if at all)?

What is a method provided by the Control class?
When does it make sense to implement a class even if you never create objects of that type?
What is technical debt?
What should you suspect if a class has abstract or base in the class name?

When mst a class be declared as abstract?
What makes abstract methods unique?
Can you create abstract instance variables?
Explain how a class can claim to implement an interface without providing an implementation for all of the methods in the interface.
Why use abstract classes?

When does implict type casting happen with references?
When is an explict type cast necessary with references?
What happens if you try to cast an object to an incompatible class? When will this error be identified?
What does the protected visiblility modifier signify?