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);
}
}
Example 4: access modifiers in java
Example of private access modifier:
class Demo
{
private void display()
{
System.out.println("Hello world java");
}
}
public class PrivateAccessModifierExample
{
public static void main(String[] args)
{
Demo obj = new Demo();
System.out.println(obj.display());
}
}
Example 5: what are the access modifiers
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