java.lang.Object java.util.AbstractCollection java.util.AbstractList java.util.Vector java.util.Stack
The Stack class represents a last-in-first-out (LIFO) stack of objects. It extends class Vector with five operations that allow a vector to be treated as a stack. The usual push and pop operations are provided, as well as a method to peek at the top item on the stack, a method to test for whether the stack is empty , and a method to search the stack for an item and discover how far it is from the top.
When a stack is first created, it contains no items.
Field Summary |
---|
Fields inherited from class java.util. Vector |
---|
capacityIncrement , elementCount , elementData |
Fields inherited from class java.util. AbstractList |
---|
modCount |
Constructor Summary | |
---|---|
Stack
() Creates an empty Stack. |
Method Summary | |
---|---|
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
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. |
Methods inherited from class java.util. Vector |
---|
add
|
Methods inherited from class java.util. AbstractList |
---|
iterator , listIterator , listIterator |
Methods inherited from class java.lang. Object |
---|
finalize , getClass , notify , notifyAll , wait , wait , wait |
Methods inherited from interface java.util. List |
---|
iterator , listIterator , listIterator |
Constructor Detail |
---|
public Stack()
Method Detail |
---|
public EObjectpush( EObjectitem)
addElement(item)
public EObjectpop()
public EObjectpeek()
public boolean empty()
public int search(Object o)