Compare and contrast all the different types of nested classes in Java: inner class, static nested class, local inner class, anonymous class. code example

Example: use of nested class in java

In Java, it is possible to define a class within another class, such 
classes are known as nested classes. They enable you to logically group 
classes that are only used in one place, thus this increases the use of 
encapsulation, and creates more readable and maintainable code.