The size() method of Java AbstractCollection is used to get the size of the Collection or the number of elements present in the Collection.
Parameters: The method does not take any parameter.
Return Value: The method returns the size or the number of elements present in the collection.
Below programs illustrates the use of AbstractCollection.size() method:
Collection: [4, Geeks, To, TreeSet, Welcome] The size of the Collection is: 5
Collection:[Geeks, for, Geeks, 10, 20] The size of the Collection is: 5
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