The Stack class represents a last-in-first-out (LIFO) stack of objects.
Stack()
empty() Tests if this stack is empty.
peek() Looks at the object at the top of this stack without removing it from the stack.
pop() Removes the object at the top of this stack and returns that object as the value of this function.
push(Object) Pushes an item onto the top of this stack.
search(Object) Returns where an object is on this stack.
Stack
public Stack()
push
public Object push(Object item)
Pushes an item onto the top of this stack.
Parameters: item - the item to be pushed onto this stack. Returns: the item argument.
pop
public synchronized Object 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. Throws: EmptyStackException if this stack is empty.
peek
public synchronized Object 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. Throws: EmptyStackException if this stack is empty.
empty
public boolean empty()
Tests if this stack is empty.
Returns: true if this stack is empty; false otherwise.
search
public synchronized int search(Object o)
Returns where an object is on this stack.
Parameters: o - the desired object. Returns: the distance from the top of the stack where the object is] located; the return value -1 indicates that the object is not on the stack.
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