#63 Anonymous Inner Class in Java

Published: 18 January 2023
on channel: Telusko

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In this lecture we will learn:
What is the meaning of Anonymous?
Anonymous inner class in Java
Syntax of an anonymous inner class
Important points related to anonymous class

#1
Anonymous means something that does not have a name.
In overriding, to provide a new implementation of a method, we need to create a new class and extend it with the parent class. After extending the class, we override the method.
We can avoid the overriding and do not need to create a new class for this particular task.
We can use the inner class concept to give a new implementation of a method.

#2
We can create a new anonymous inner class after creating an object of a class that contains the method.
We do not need to use a class keyword with an anonymous inner class.
It just starts with braces and contains the method and its new implementation.
Anonymous inner class starts just the creation of an object and ends with the semicolon of that object.
e.g., A obj=new A()
{
public void show()
{
new statement;
}
};

#3
Anonymous class used in the interface, functional interface, lambda expressions.
Anonymous inner class can implement only one interface at s time.
It can either extend a class or implement an interface at a time.
We do not write a constructor for an anonymous inner class because it does not have any class name.
An anonymous class has access to the members of its enclosing class.

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