Access Modifiers-1

Access Modifiers-1

1) private

The private access modifier is accessible only within class.
Simple example of private access modifier
In this example, we have created two classes A and Simple. A class contains private data member and private method. We are accessing these private members from outside the class, so there is compile time error.

    class A{ 
    private int data=40; 
    private void msg(){System.out.println("Hello java");} 
    } 
     
    public class Simple{ 
     public static void main(String args[]){ 
       A obj=new A(); 
       System.out.println(obj.data);//Compile Time Error 
       obj.msg();//Compile Time Error 
       } 
    } 

Role of Private Constructor:

If you make any class constructor private, you cannot create the instance of that class from outside the class. For example:

    class A{ 
    private A(){}//private constructor 
     
    void msg(){System.out.println("Hello java");} 
    } 
     
    public class Simple{ 
     public static void main(String args[]){ 
       A obj=new A();//Compile Time Error 
     } 
    } 

Note: A class cannot be private or protected except nested class.