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Inheritance in Java

Inheritance in Java

In this lesson, you'll learn about an important concept of Object Oriented programming known as Inheritance.

We'll cover the following...

What is inheritance? #

Inheritance provides a way to create a new class from an existing class. The new class is a specialized version of the existing class such that it inherits elements of the existing class.

Terminology #

  • Superclass(Parent Class): This class allows the re-use of its members in another class.
  • Derived Class(Child Class or Subclass): This class is the one that inherits from the superclass.

Hence, we can see that classes can be built by using previously created classes!

Notation #

Let’s take a look at the notation necessary for the creation of subclasses. This is done by using the keyword extends.

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class Student{
  public String name;
  public int age;
}
class Undergrad extends Student{
  String major;
  public Undergrad(){
    this.major = "Computer"
    this.name="John Doe";
    this.age=50;
  }
}

Inheritance establishes an " is an" relationship ...