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  1. // Parent class demonstrating encapsulation
  2. class EncapsulationDemo {
  3.     // Private variable accessible only within this class
  4.     private int privateVariable;
  5.  
  6.     // Public method to set the private variable
  7.     public void setPrivateVariable(int value) {
  8.         // Encapsulation: controlling access to private variable through a public method
  9.         this.privateVariable = value;
  10.     }
  11.  
  12.     // Public method to get the private variable
  13.     public int getPrivateVariable() {
  14.         return this.privateVariable;
  15.     }
  16.  
  17.     // Protected method accessible within this class and subclasses
  18.     protected void protectedMethod() {
  19.         System.out.println("This is a protected method.");
  20.     }
  21. }
  22.  
  23. // Subclass demonstrating inheritance and access to protected members
  24. class SubClass extends EncapsulationDemo {
  25.     // Public method in subclass accessing protected method of parent class
  26.     public void accessProtectedMethod() {
  27.         protectedMethod(); // Accessing protected method of parent class
  28.     }
  29. }
  30.  
  31. // Main class to demonstrate the encapsulation
  32. public class Main {
  33.     public static void main(String[] args) {
  34.         // Creating an instance of EncapsulationDemo class
  35.         EncapsulationDemo obj = new EncapsulationDemo();
  36.  
  37.         // Setting the private variable using a public method
  38.         obj.setPrivateVariable(10);
  39.  
  40.         // Getting the private variable using a public method
  41.         int value = obj.getPrivateVariable();
  42.         System.out.println("Private variable: " + value);
  43.  
  44.         // Creating an instance of SubClass
  45.         SubClass subObj = new SubClass();
  46.  
  47.         // Accessing the protected method of the parent class through subclass
  48.         subObj.accessProtectedMethod();
  49.     }
  50. }
  51.  
Success #stdin #stdout 0.11s 55604KB
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Standard input is empty
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Private variable: 10
This is a protected method.
https://ideone.com/ZjmsFh
language:
Java (HotSpot 12)
created:
33 days ago
visibility:
public

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