protected access modifier code example

Example 1: java protected

/* similar to private keyword, but also lets both:
  - subclasses
  - classes in same package
  access the variable, method or constructor */

class Superclass {
  protected int myNumber = 5;
}

class Subclass extends SuperClass {
  // has access to myNumber
}

class InAnotherPackage {
  // doesn't have access to myNumber
}

Example 2: access modifiers in java

In Java, access specifiers are the keywords which are used to define 
the access scope of the method, class, or a variable. 
  In Java, there are four access specifiers.
  
  * Public: The classes, methods, or variables which are defined as public, 
  can be accessed by any class or method.
  * Protected: Protected can be accessed by the class of the same package, 
or by the sub-class of this class, or within the same class.
  * Default: Default are accessible within the package only. 
    By default, all the classes, methods, and variables are of default scope.
  * Private: The private class, methods, or variables defined as private 
    can be accessed within the class only

Example 3: protected in java

//The protected keyword is an access modifier used for attributes, 
//methods and constructors, 
//making them accessible in the same package and subclasses.

class Person {
  protected String fname = "John";
  protected String lname = "Doe";
  protected String email = "[email protected]";
  protected int age = 24;
}

class Student extends Person {
  private int graduationYear = 2018;
  public static void main(String[] args) {
    Student myObj = new Student();
    System.out.println("Name: " + myObj.fname + " " + myObj.lname);
    System.out.println("Email: " + myObj.email);
    System.out.println("Age: " + myObj.age);
    System.out.println("Graduation Year: " + myObj.graduationYear);
  }
}