#63 Anonymous Inner Class in Java

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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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