JAVA Tutorial: What is Encapsulation? With Example Codes

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Hi to All!
Today we are going to learn another JAVA OOP concept which is Encapsulation. Let's Start:

Encapsulation in JAVA

Let's go through the files:

1. myEncapsulation.java Class

/*
 What is Encapsulation?
 Ans: Encapsulation is something like hiding data. 
 Encapsulation is a system by which we can keep things in a class secret( private )
 and access those through public methods from other class.
 
 If anything in a class declared private, that can't be accessed outside the
 class. More or less it's like reducing the dependency of our encapsulated class.
 Advantage of Encapsulation  is, if you need to change the codes, as because of
 less dependency you don't have to work much for modification.
 
 */

public class myEncapsulation {

 public static void main(String[] args) {
  
  // Now we will create object of our EncapsulationMethods class.
  EncapsulationMethods bankDetails = new EncapsulationMethods();
  
  /*
   I'm going to access the encapsulated class through creating object
   and the fields which are kept private in that class like 
   bankBalance,accountNo.
   */
  bankDetails.AccountHolderByName("Mosharrof Rubel");
  bankDetails.FindAccountByName("Jakir Hossain");
  bankDetails.BalanceCheckByPin(1234);
 /*
 The printed output are:

 Name of the account holder is: Mosharrof Rubel
 Jakir Hossain is the account holder & Encapsulated account no is: 420
 Pin is: 1234 and Encapsulated balance is: 119273.78 BDT


 
  */
  
 }

}

2. EncapsulationMethods.java Class

public class EncapsulationMethods {

 // declaring some private variables
 private String person;
 private double bankBalance;
 private int accountNo;
 
 // declaring some public methods
 
 public void AccountHolderByName(String name){
  person = name;
  System.out.println("Name of the account holder is: "+person);
 }

 public void FindAccountByName(String name){
  accountNo = 420;
  System.out.println(name+" is the account holder & Encapsulated account no is: "+accountNo);
 }
 
 public void BalanceCheckByPin(int pin){
  bankBalance = 119273.78;
  System.out.println("Pin is: "+pin+ " and Encapsulated balance is: "+ bankBalance+" BDT");
 }
 
  
 
}

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