Class UnsyncStack<E>

    • Method Detail

      • push

        public E push​(E item)
        Pushes an item onto the top of this stack. This has exactly the same effect as: add(item)
        Parameters:
        item - the item to be pushed onto this stack.
        Returns:
        the item argument.
        See Also:
        ArrayList.add(E, java.lang.Object[], int)
      • pop

        public E pop()
        Removes the object at the top of this stack and returns that object as the value of this function.
        Returns:
        The object at the top of this stack (the last item of the ArrayList object).
        Throws:
        EmptyStackException - if this stack is empty.
      • peek

        public E peek()
        Looks at the object at the top of this stack without removing it from the stack.
        Returns:
        the object at the top of this stack (the last item of the ArrayList object).
        Throws:
        EmptyStackException - if this stack is empty.
      • empty

        public boolean empty()
        Tests if this stack is empty.
        Returns:
        true if and only if this stack contains no items; false otherwise.
      • search

        public int search​(Object o)
        Returns the 1-based position where an object is on this stack. If the object o occurs as an item in this stack, this method returns the distance from the top of the stack of the occurrence nearest the top of the stack; the topmost item on the stack is considered to be at distance 1. The equals method is used to compare o to the items in this stack.
        Parameters:
        o - the desired object.
        Returns:
        the 1-based position from the top of the stack where the object is located; the return value -1 indicates that the object is not on the stack.