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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 |
Method Summary | |
boolean | empty()
Tests if this stack is empty. |
java.lang.Object | peek()
Looks at the object at the top of this stack without removing it from the stack. |
java.lang.Object | pop()
Removes the object at the top of this stack and returns that object as the value of this function. |
java.lang.Object | push(java.lang.Object item)
Pushes an item onto the top of this stack. |
int | search(java.lang.Object o)
Returns the 1-based position where an object is on this stack. |
Methods inherited from class java.util.Vector | |
addAll, addAll, addElement, add, add, capacity, clear, clone, containsAll, contains, copyInto, elementAt, elements, ensureCapacity, equals, firstElement, get, hashCode, indexOf, indexOf, insertElementAt, isEmpty, lastElement, lastIndexOf, lastIndexOf, removeAllElements, removeAll, removeElementAt, removeElement, remove, remove, retainAll, setElementAt, setSize, set, size, toArray, toArray, toString, trimToSize |
Methods inherited from class java.util.AbstractList | |
add, add, addAll, equals, get, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, remove, set, subList |
Methods inherited from class java.util.AbstractCollection | |
add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray, toString |
Methods inherited from class java.lang.Object | |
Method Detail |
public java.lang.Object push(java.lang.Object item)
addElement(item)
item
- the item to be pushed onto this stack.item
argument.public java.lang.Object pop()
public java.lang.Object peek()
public boolean empty()
true
if and only if this stack contains
no items; false
otherwise.public int search(java.lang.Object o)
o
- the desired object.-1
indicates that the object is not on the stack.Overview | Package | Class | Tree | Index | Help | |||
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