File	Doc	Category	Size	Date	Package
ArrayListStack.java	API Doc	Glassfish v2 API	5178	Fri May 04 22:32:10 BST 2007	com.sun.enterprise.util.collection

ArrayListStack

• java.lang.Object

Fields Summary
private int	curIndex
private ArrayList	list

Constructors Summary
public ArrayListStack(int size) Creates a stack with the given initial size curIndex = 0; list = new ArrayList(size);
public ArrayListStack() Creates a stack with a default size this(20);

Methods Summary
public boolean	empty() Tests if this stack is empty. return true if and only if this stack contains no items; false otherwise. return curIndex == 0;
public java.lang.Object	peek() Looks at the object at the top of this stack without removing it from the stack. return the object at the top of this stack (the last item of the ArrayList object). Null if stack is empty. Object top = null; if (curIndex > 0) { top = list.get(curIndex - 1); } return top;
public java.lang.Object	pop() Removes the object at the top of this stack and returns that object as the value of this function. return The object at the top of this stack (the last item of the ArrayList object). Null if stack is empty. if (curIndex > 0) { curIndex -= 1; return list.remove(curIndex); } return null;
public void	push(java.lang.Object obj) Pushes an item onto the top of this stack. This method will internally add elements to the ArrayList if the stack is full. param obj the object to be pushed onto this stack. see java.util.ArrayList#add list.add(curIndex, obj); curIndex += 1;
public int	size() Provides the current size of the stack. return int return the current size. return curIndex;