COMSCI 2110 - Inheritance, Polymorphism, Abstraction

This keyword extends a class (indicates that a class is inherited from another class).

Only one superclass can be extended by a class.

In Java, it is possible to inherit attributes and methods from one class to another.

two categories of "inheritance concept"

Types of Inheritance

What type of inheritance

What type of inheritance

What type of inheritance

type of inheritance that is not supported In Java

If you don't want other classes to inherit from a class, use the _______ keyword

keyword is used to access methods of the parent class.

It is used to represent an instance of the parent class which is created implicitly for each object of the child class.

It can be used to invoke the parent class methods and constructors.

It can also be used to access the fields of the parent class.

It is used to access methods of the current class.

It is used to represent the current instance of a class.

It is used to access the instance variables and invoke current class methods and constructors. It can be passed as an argument to a method call representing the current class instance.

It allows us to perform a single action in different ways.

It means many forms (from poly (many) and morphs (forms)).

Types of Java polymorphism

This type of polymorphism is achieved by function overloading or operator overloading.

Compile-Time Polymorphism is also known as ________.

When there are multiple functions with the same name but different parameters then these functions are said to be overloaded. Functions can be overloaded by changes in the number of arguments or/and a change in the type of arguments.

It is a process in which a function call to the overridden method is resolved at Runtime.

Runtime Polymorphism is also known as ____.

Runtime Polymorphism is achieved by _______.

occurs when a derived class has a definition for one of the member functions of the base class. That base function is said to be overridden.

The function of a superclass/parent class is overwritten by the function of its subclass/child class

is a process of hiding the implementation details from the user and showing only the functionality to the user.

Abstraction can be achieved by using ______.

a class that cannot be instantiated on its own and is meant to be inherited by concrete classes.

It cannot be declared as final.

The only keyword needed to make a class an abstract

It is a method declared without an implementation.

It is a method that is declared but not defined in a class. It acts as a placeholder for methods that must be implemented in subclasses.

They are collections of abstract methods

It is probably the most powerful tools to achieve abstraction in java.

It is completely pure abstract classes.

we use key word ___ in interface, there is no need to use keyword abstract.

We can only extend 1 class, but can implement multiple classes

an unwanted event that interrupts the general flow of the program.

Exception is also kmnown as _______.

This statement allows you to define a block of code to be tested for errors while it is being executed.

This statement allows you to define a block of code to be executed, if an error occurs in the try block.

This statement lets you execute code, after try...catch, regardless of the result.