The containsAll() method of Java TreeSet is used to check whether two sets contain the same elements or not. It takes one set as a parameter and returns True if all of the elements of this set is present in the other set.
public boolean containsAll(Collection C)
Parameters: The parameter C is a Collection. This parameter refers to the set whose elements occurrence is needed to be checked in this set.
Return Value: The method returns True if this set contains all the elements of other set otherwise it returns False.
Below programs illustrate the TreeSet.containsAll() method:
TreeSet 1: [10, 20, Geeks, for] TreeSet 2: [10, 20, Geeks, for] Does set 1 contains set 2: true
TreeSet 1: [Geeks, for] TreeSet 2: [10, 20] Does set 1 contains set 2: false
Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more, please refer Complete Interview Preparation Course.