boolean empty(): Tests if this stack is empty.
E peek() : Looks at the object at the top of this stack without removing it from the stack.
E pop() : Removes the object at the top of this stack and returns that object as the value of this function.
E push(E item): Pushes an item onto the top of this stack.
int search(Object o): Returns the 1-based position where an object is on this stack.
boolean empty(): Tests if this stack is empty.
E peek() : Looks at the object at the top of this stack without removing it from the stack.
E pop() : Removes the object at the top of this stack and returns that object as the value of this function.
E push(E item): Pushes an item onto the top of this stack.
int search(Object o): Returns the 1-based position where an object is on this stack.