Question

list 2 main principles of OOPS and explain them

Answer 1

Here are the 2 main principles of OOPS:

(1) Inheritance

(2) Encapsulation


(1) Inheritance:

= > It is the property of deriving the new class from old one.

= > Old class is known as superclass and the new class is known as the subclass. 

= > The keyword extend is used by the subclass to inherit the properties of the superclass


Ex:

class Quora
{
public void Rank()
{
System.out.println("Brainly Guru");
}
}

public class Brainly Extends Quora
{
public void SpecialRank()
{
System.out.println("Core Moderator");
}
public static void main(String args[])
{
Brainly a = new Brainly();
a.Rank();
a.SpecialRank();
}
}


Output:

Brainly Guru
Core Moderator





(2) Encapsulation:

= > Wrapping the data as a single unit.

= > It controls the way data is modified.

Ex:

class Some
{
 
private String student;

public String getName()
{
return student;
}


public void setName(String student)
{
this.student=student;
}
}


public class Demo
{
public static void main(String[] args)
{
Some s = new Some();
s.setName("Siddhartha");
System.out.println(s.getName());
}
}

Output:

Siddhartha.




Hope this helps!