The add() method in Java AbstractCollection is used to add a specific element into a Collection. This method will add the element only if the specified element is not present in the Collection else the function will return False if the element is already present in the Collection.
Parameters: The parameter element is of the object type and refers to the element to be added to the Collection.
Return Value: The function returns True if the element is not present in the Collection otherwise False if the element is already present in the Collection.
Below programs illustrate the AbstractCollection.add() method:
Program 1: Adding String elements into the Collection of ArrayList.
AbstractCollection: [Welcome, To, Geeks, 4, Geeks]
Program 2: Adding Integer elements into the Collection of LinkedList.
AbstractCollection: [15, 20, 25, 30, 35]
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