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  1. class Person {
  2.     // Encapsulation: Private fields
  3.     private String name;
  4.     private int age;
  5.  
  6.     // Constructor: Initializes object when created
  7.     public Person(String name, int age) {
  8.         this.name = name;
  9.         this.age = age;
  10.     }
  11.  
  12.     // Encapsulation: Getter and Setter methods
  13.     public String getName() {
  14.         return name;
  15.     }
  16.  
  17.     public void setName(String name) {
  18.         this.name = name;
  19.     }
  20.  
  21.     public int getAge() {
  22.         return age;
  23.     }
  24.  
  25.     public void setAge(int age) {
  26.         if (age > 0) {  // Encapsulation ensures age is positive
  27.             this.age = age;
  28.         }
  29.     }
  30.  
  31.     public void display() {
  32.         System.out.println("Name: " + name + ", Age: " + age);
  33.     }
  34.  
  35.     public static void main(String[] args) {
  36.         // Constructor initializes object
  37.         Person p1 = new Person("Alice", 25);
  38.  
  39.         // Encapsulation: Accessing private fields via getter/setter
  40.         p1.setAge(30);
  41.         System.out.println("Updated Age: " + p1.getAge());
  42.  
  43.         // Display details
  44.         p1.display();
  45.     }
  46. }
  47.  
Success #stdin #stdout 0.17s 57928KB
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Updated Age: 30
Name: Alice, Age: 30
https://ideone.com/DVlJTp
language:
Java (HotSpot 12)
created:
3 days ago
visibility:
public

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