CODEWITHSUNDEEP
javastack
MarcElrick
MarcElrick

Reputation: 93

How can I look at a specific item in a stack?

I've has a look around and can't seem to fins an answer.

In Java, if I have a stack with 10 items, is there a way to look at the 4th item without altering the stack?

Thanks in advance.

Upvotes: 0

Views: 1206

Answers (1)

Adnan Isajbegovic
Adnan Isajbegovic

Reputation: 2307

Its possible to see element at specific index in Java's java.util.Stack:

Stack<String> stack = new Stack<>();

// adding multiple elements to stack

stack.elementAt(3);

Reason for this is because Stack is extending Vector and elementAt is Vectors method... Also, Vector has the following public method:

stack.get(3);

So this will work too...

And Vector is basically wrapping array, so it will work in O(1).

This of course, goes against theoretical Stack, but most of data structures in Java are different, they mostly wrap basic array so you end up having more functionalities...

Upvotes: 1

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