The containsAll() method of Java Stack is used to check whether two stacks contain the same elements or not. It takes one stack as a parameter and returns True if all of the elements of this stack is present in the other stack.
public boolean containsAll(Collection C)
Parameters: The parameter C is a Collection. This parameter refers to the stack whose elements occurrence is needed to be checked in this stack.
Return Value: The method returns True if this stack contains all the elements of other stack otherwise it returns False.
Below programs illustrate the Stack.containsAll() method:
Stack 1: [Geeks, for, Geeks, 10, 20] Stack 2: [Geeks, for, Geeks, 10, 20] Does stack 1 contains stack 2: true
Stack 1: [Geeks, for, Geeks] Stack 2: [10, 20] Does stack 1 contains stack 2: false
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