Encapsulation

//The only way to acess the variables of a class is through methods.
//Encapsulation - Binding data through methods.
//Encapsulation can be achieved through getters and setters used along with this.keyword
//need of encapsulation - To hide the implementation details from the users, If a data member is private it means it can only be accessed within the same class. No outside class can access private data member (variable) of other class. 
//eclipse ide already has inbuild getters and setters option for your code

// Encapsulation -> Binding data with method
class Student
{
	private int rollno;
	private String name;
	
	public int getRollno() {
		System.out.println("user is accessing the value");
		return rollno;
	}
	public void setRollno(int rollno) {
		this.rollno = rollno;
		System.out.println("value of rollno changed");
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	
	// Getters and Setters
	
	
	
//	public void setRollno(int r)
//	{
//		rollno = r;
//	}
//	public int getRollno() 
//	{
//		return rollno;
//	}
}

public class EncapsulationDemo 
{
	public static void main(String[] args)
	{
		Student s1 = new Student();
		s1.setRollno(2);
		s1.setName("Navin");
		
		System.out.println(s1.getRollno());
		System.out.println(s1.getName());
	}
}