Access specifier

 Access Specifier

•  Sometimes it is necessary to restrict the access to certain variables and method from outside the class.
• We don’t want that object of a class directly alter the value of a variable or method.
•  We can specify visibility control.

1)Private

2)Public

3)protected

Private:

•  Private Field has the highest degree of protection and they are accessible only within their own class.
• Private members can not be inherited into the subclass.

Public:

•  When any member is declared as public, it is visible to entire class in which it is defined.
• If you want to make it visible to all the class or entire for the program then declare that member as public.

Protected:

• The visibility level of protected field lies in between the public and private access.
•  The protected applies only when the inheritance is involved.
•  Members declared as protected only accessible to that class and the sub class of that class.

Default access/friendly access

•  When no access modifier is specified then it is default access, which has limited version of public accessibility known as friendly level of access.

• The difference between the public access and friendly access is that the public modifier makes fields visible in all classes.