|
Java Platform 1.2 Beta 4 |
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object | +--java.util.AbstractCollection | +--java.util.AbstractList | +--java.util.Vector | +--java.util.Stack
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.
Fields inherited from class java.util.Vector | |
capacityIncrement , elementCount , elementData |
Fields inherited from class java.util.AbstractList | |
modCount |
Constructor Summary | |
Stack()
|
Method Summary | |
boolean | empty()
Tests if this stack is empty. |
Object | peek()
Looks at the object at the top of this stack without removing it from the stack. |
Object | pop()
Removes the object at the top of this stack and returns that object as the value of this function. |
Object | push(Object 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. |
Methods inherited from class java.util.Vector | |
add , add , addAll , addAll , addElement , capacity , clear , clone , contains , containsAll , copyInto , elementAt , elements , ensureCapacity , equals , firstElement , get , hashCode , indexOf , indexOf , insertElementAt , isEmpty , lastElement , lastIndexOf , lastIndexOf , remove , remove , removeAll , removeAllElements , removeElement , removeElementAt , retainAll , set , setElementAt , setSize , size , toArray , toArray , toString , trimToSize |
Methods inherited from class java.util.AbstractList | |
iterator , listIterator , listIterator , subList |
Methods inherited from class java.lang.Object | |
finalize , getClass , notify , notifyAll , wait , wait , wait |
Constructor Detail |
public Stack()
Method Detail |
public Object push(Object item)
addElement(item)
item
- the item to be pushed onto this stack.item
argument.Vector.addElement(java.lang.Object)
public Object pop()
public Object peek()
public boolean empty()
true
if and only if this stack contains
no items; false
otherwise.public int search(Object o)
o
- the desired object.-1
indicates that the object is not on the stack.
|
Java Platform 1.2 Beta 4 |
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |