Compile time - When the program compiles

Composition - HAS-A relationship. Combining simple parts together to form something else by having instances of a class within an instance of another class. It has a relationship where a child cannot independently exist without the parent.

Concrete Class - A class which has all implementations of its methods, so you are able to create an object of its class with new

Delegation - An object passing its responsibility to another object through a HAS-A relationship.

Double Dispatch -

Encapsulation -

Flexibility - Decoupled code that is reusable and is easy to implement unexpected requirements, opposite of Rigidity

Fragility - Code that breaks in somewhere by changing something in a completely different place

Hollywood Principle - “Don't call us, we'll call you”. Methods are called in the superclass instead of a subclass calling methods in the superclass.

Inheritance - IS-A relationship.

Instantiation - Creating a real instance of a class

Interface

• An interface can refer to the keyword interface in Java which defines expected behavior for a concrete class to have. When a concrete class implements an interface it is required to implement all the methods defined in that interface.

• An interface could also mean a concrete class implementing a method from a super type class or interface.

Lazy Initialization - Delaying the creation of an object until it is actually needed

Object -

Polymorphism -

Reflection

Rigidity - Code that is hard to change because it affects many different parts of the system

Run-Time - While the program is running

Subclass - a child class which extends/inherits from a super/base class/parent class