[JAVA API] java.util.Stack<E>

Stack 사용 예제

import java.util.*;

class Ex105_Stack 
{
	public static void main(String[] args)
	{
		//Ex105_Stack.java

		//stack 컬렉션
		//	- 후입선출(LIFO : Last Input First Output)
		Stack list = new Stack();

		//void push(Object o)
		//Object pop()

		list.push("하나");
		list.push("둘");
		list.push("셋");

		System.out.println(list.size());

		System.out.println(list.pop());	//data read + remove
		System.out.println(list.pop());
		System.out.println(list.pop());

		System.out.println(list.size());

		list.push("하나");
		list.push("둘");
		list.push("셋");

		System.out.println(list.peek()); //data read(peek) only
		System.out.println(list.peek());
		System.out.println(list.peek());
	}
}

 

 

java.util

Class Stack<E>

• java.lang.Object
• • java.util.AbstractCollection<E>
  • • java.util.AbstractList<E>
    • • java.util.Vector<E>
      • • java.util.Stack<E>

• All Implemented Interfaces:

  Serializable, Cloneable, Iterable<E>, Collection<E>, List<E>, RandomAccess

  ---

  
  

  public class Stack<E>
  extends Vector<E>

  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<Integer> stack = new ArrayDeque<Integer>();

  Since:

  JDK1.0

  See Also:

  Serialized Form

• • Field Summary

    • Fields inherited from class java.util.Vector

      capacityIncrement, elementCount, elementData

    • Fields inherited from class java.util.AbstractList

      modCount

  • Constructor Summary

    Constructors 

    Constructor and Description
    Stack() Creates an empty Stack.

  • Method Summary

    Methods 

    Modifier and Type	Method and Description
    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(E 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, iterator, lastElement, lastIndexOf, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, removeAllElements, removeElement, removeElementAt, removeRange, retainAll, set, setElementAt, setSize, size, subList, toArray, toArray, toString, trimToSize

    • Methods inherited from class java.lang.Object

      finalize, getClass, notify, notifyAll, wait, wait, wait