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public class: Stack [javadoc | source]

All Implemented Interfaces:
    Cloneable, List, Serializable, RandomAccess, Collection

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.

A more complete and consistent set of LIFO stack operations is provided by the Deque interface and its implementations, which should be used in preference to this class. For example:

  Deque stack = new ArrayDeque();}
Fields inherited from java.util.Vector:
elementData,  elementCount,  capacityIncrement
Fields inherited from java.util.AbstractList:
 public Stack() 
Method from java.util.Stack Summary:
empty,   peek,   pop,   push,   search
Methods from java.util.Vector:
add,   add,   addAll,   addAll,   addElement,   capacity,   clear,   clone,   contains,   containsAll,   copyInto,   elementAt,   elementData,   elements,   ensureCapacity,   equals,   firstElement,   get,   hashCode,   indexOf,   indexOf,   insertElementAt,   isEmpty,   iterator,   lastElement,   lastIndexOf,   lastIndexOf,   listIterator,   listIterator,   remove,   remove,   removeAll,   removeAllElements,   removeElement,   removeElementAt,   removeRange,   retainAll,   set,   setElementAt,   setSize,   size,   subList,   toArray,   toArray,   toString,   trimToSize
Methods from java.util.AbstractList:
add,   add,   addAll,   clear,   equals,   get,   hashCode,   indexOf,   iterator,   lastIndexOf,   listIterator,   listIterator,   remove,   removeRange,   set,   subList
Methods from java.util.AbstractCollection:
add,   addAll,   clear,   contains,   containsAll,   isEmpty,   iterator,   remove,   removeAll,   retainAll,   size,   toArray,   toArray,   toString
Methods from java.lang.Object:
clone,   equals,   finalize,   getClass,   hashCode,   notify,   notifyAll,   toString,   wait,   wait,   wait
Method from java.util.Stack Detail:
 public boolean empty() 
    Tests if this stack is empty.
 public synchronized E peek() 
    Looks at the object at the top of this stack without removing it from the stack.
 public synchronized E pop() 
    Removes the object at the top of this stack and returns that object as the value of this function.
 public E push(E item) 
    Pushes an item onto the top of this stack. This has exactly the same effect as:
 public synchronized int search(Object o) 
    Returns the 1-based position where an object is on this stack. If the object o occurs as an item in this stack, this method returns the distance from the top of the stack of the occurrence nearest the top of the stack; the topmost item on the stack is considered to be at distance 1. The equals method is used to compare o to the items in this stack.