Nested classes(inner class) in java

Sat Jan 31, 2009 2:29 am

Nested (inner ) classes:
You can create a class inside other class .This class is called nested class and the main class is called outer class

For example:

Code:: class <OuterNameofClass> { // variables and methods for the outer class class <NestedNameofClass> { // variables and methods for the nested class } }

Nested class is a member of the outer class and can see all other members of the class (methods and variables). Nested class can be static or non static .You may ask when I need a nested class? You may need it in cases that the nested class depends in the outer class in its functionality and existence.

Rules :

if you have a static nested class, you can't access the methods and variables of the outer class from the static nested (inner) class.
You can't create a static member inside the nested class.
To have instance of nested class you must have a instance of outer class.
Nested class can be declared abstract or final.

Code:: public class Main { public static void main(String[] args) { outterclass outobj=new outterclass(); outterclass.innerclass innerobj=outobj.new innerclass(); } } class outterclass { class innerclass { } }

Nested classes(inner class) in java

Nested classes(inner class) in java

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