What is Encapsulation?

• The process of hiding internal data from the external world and accessing it only through publicly exposed methods is known as encapsulation.

                            OR

• Wrapping of data and member functions into a single unit so that we can provide security for the data

Example:

 bank.java

      

class bank

{

      private double balance;  //by declaring balance variable as PRIVATE, we can encapsulate

      public void  setBalance(double balance)

      {

            this.balance=this.balance+balance;

       }

      public double getBalance()

      {

              return balance;

       }

}

customer.java

class customer

{

     public static void main(String a[])

    {

              bank b1=new bank();

            //b1.balance=4000; compile time error ll occur, bcoz balance variable ENACAPSULTED by declaring as PRIVATTE

              b1.setBalance(4000) ;

             //system.out.println(b1.balance); compile time error

              System.out.println(b1.getBalance());

     }

}