Learn object-oriented programming concepts like classes, inheritance, and polymorphism in Java to create efficient and reusable code.

Android Development with Java

This module covers all the concepts related to object-oriented programming (OOP). Starting with the basics and reviewing complex topics like inheritance and polymorphism, this module is filled with illustrations, exercises, quizzes, and hands-on challenges. We’ll walk away with an understanding of the classes and the behavior of objects. By the end of this module, we'll be able to write cleaner, more modular, and more reusable code.

Learn Object-Oriented Programming in Java

Which keyword is used to derive a class from another class?

Which keyword is used to derive a class from another class?

A subclass can use all the fields and methods of the superclass directly which are: 

A subclass can use all the fields and methods of the superclass directly which are:

Subclass is not calling the parent class constructor

Superclass is not calling the subclass constructor

```java
class A {
    
    int i;
    public A(int i)
    {
        this.i=i; 
    }
    
}
class B extends A{
    
    int j;
    public B(int j)
    {
        this.j=j;
    }
    
}
```
The above code won't compile because

<pre><code class="language-java">class A {
 
 int i;
 public A(int i)
 {
 this.i=i; 
 }
 
}
class B extends A{
 
 int j;
 public B(int j)
 {
 this.j=j;
 }
 
}
</code></pre>
The above code won’t compile because

The <code>super</code> keyword is used to call?

Calls to constructors using `this( )` and `super( )` can be written inside

Calls to constructors using <code>this( )</code> and <code>super( )</code> can be written inside

Let's test your understanding of Inheritance with the help of this short quiz.

Classes and Objects

Data Hiding

Object Oriented Programming in Java - Exam I

Inheritance

Polymorphism

Abstract Classes and Interfaces

Composition, Aggregation and Association

Conclusion

Quiz