Java Modifiers

In the Java it is possible to modify classes, methods, etc., by using modifiers. There are two categories of modifiers:

  1. Access Modifiers: default, public , protected, private

     

            Java provides a number of access modifiers to set access levels for                   classes, variables, methods and constructors. 

            The four access levels are:

•         Visible to the package, the default. No modifiers are needed.
•         Visible to the class only (private).
•         Visible to the world (public).
•         Visible to the package and all subclasses (protected).

   2. Non-access Modifiers: static, final, abstract, synchronized,volatile.

                 Java provides a number of non-access modifiers to achieve many other             functionality.     

               The non-access modifier are of six types:

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•               The static modifier for creating class methods and variables
•             The final modifier for finalizing the implementations of classes,                   methods, and variables.
•             The abstract modifier for creating abstract classes and methods.
•             The synchronized and volatile modifiers, which are used for threads.