Stack

Stack class can be used.

Creating

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

Pushing

stack.push(i)

Popping

Integer i = stack.pop()

Peeking

Returns last element without removing.

Integer i = stack.peek()

Searching

Returns position of the element.

Position starts from 1(not 0) and is counted from the topmost(last) element.

Returns -1 if element is not found.

Integer pos = stack.search(element);