Java & OO Intermediate
Inheritance[*]Given a class hierarchy, identify parents and children
[*]Use the correct Java syntax for extending a class.
[*]Write expressions that upcast or downcast a reference (no tricks, no arrays).
Object
[*]Know that java.lang.Object is the ultimate ancestor.
[*]Identify methods inherited from the Object class.
[*]Write correct implementation of the toString() method.
Overriding
[*]Explain the overriding mechanism and late binding
[*]From given code including a late binding call, predict the method that will be called.
[*]Identify correct overriding syntax, distinguish between the overriding and overloading mechanism.
Abstract
[*]Write code that declares abstract classes and methods
[*]Understand that an abstract class cannot be instantiated
[*]Know that once a class contains an abstract method, it must be marked as abstract.
Interfaces
[*]Write code that declares an interface and its containing methods.
[*]Make a class implement an interface correctly.
[*]Explain the particular nature of attributes declared in interfaces.
[*]Identify differences between implementing an interface and extending a class.
[*]Know that all methods of an interface are public.
instanceof
[*]Write code that uses the instanceof operator for run-time type identification.
[*]Identify correct operands of the instanceof operator
Access modifiers
[*]From a given situation, predict if a method can access a class attributes/methods, whatever of the 4 access modifiers are applied on these attributes/methods.
[*]Select the appropriate access modifier to enable a class to access or not access an attribute/method.
Overloading
[*]Implement constructor an method overloading correctly.
[*]Know that two methods cannot differ only on the return type.
Annotation
[*]Use the @Override annotation
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