Inner Classes in Java

Java Inner Classes

We use inner classes to logically group classes and interfaces in one place so that it can be more readable and maintainable.Java inner class or nested class is a class which is declared inside the class or interface.

Additionally, it can access all the members of outer class including private data members and methods.

Syntax of Inner class

1. class Java_Outer_class{  
2.  //code  
3.  class Java_Inner_class{  
4.   //code  
5.  }  
6. }  

Advantage of java inner classes

There are basically three advantages of inner classes in java. They are as follows:

1) Nested classes represent a special type of relationship that is it can access all the members (data members and methods) of outer class including private.

2) Nested classes are used to develop more readable and maintainable code because it logically group classes and interfaces in one place only.

3) Code Optimization: It requires less code to write.

Types of Nested classes

There are two types of nested classes non-static and static nested classes.The non-static nested classes are also known as inner classes.

• Non-static nested class (inner class)
  1. Member inner class
  2. Anonymous inner class
  3. Local inner class
  4. Static nested class

Member inner class:

http://javadevelopmenttricks.blogspot.in/2018/02/java-member-inner-class.html

Anonymous inner class:

http://javadevelopmenttricks.blogspot.in/2018/02/java-anonymous-inner-class.html

Local inner class :

http://javadevelopmenttricks.blogspot.in/2018/02/java-local-inner-class.html

Static nested class:

http://javadevelopmenttricks.blogspot.in/2018/02/java-static-nested-class.html

• Tweet
• Share
• Share
• Share
• Share

Sign up here with your email