pre {font-family:"Courier New", Courier, Arial; font-size: 12px;}
.operator {color: #000000;}
.keyword {color: #993300;}
.identifier {color: #000087;}
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//****************************************************************************
// FileName: Stack.as
// Description:Stack
// Author: AOL
// Last Modified:14/10/2003
//****************************************************************************
import net.flash8.ds.LinkedList;
class net.flash8.ds.Stack
{
private var stackList:LinkedList;
// constructor
public function Stack()
{
stackList = new LinkedList("stack");
}
// add object to stack
public function push(object:Object):Void
{
stackList.insertAtFront(object);
}
// remove object from stack
public function pop():Object
{
return stackList.removeFromFront();
}
// determine if stack is empty
public function isEmpty():Boolean
{
return stackList.isEmpty();
}
// output stack contents
public function print():Void
{
stackList.print();
}
}
// end class Stack
//SatckTest.fla
import net.flash8.ds.Stack;
import net.flash8.ds.EmptyListError;
var stack = new Stack();
// create objects to store in the stack
var bool:Boolean = true;
var integer:Number = 12324;
var string:String = "hello";
var movieClip:MovieClip = new MovieCip("movie clip");
// use push method
stack.push(bool);
stack.print();
stack.push(integer);
stack.print();
stack.push(string);
stack.print();
stack.push(movieClip);
stack.print();
// remove items from stack
try
{
var removedObject:Object = null;
for(var i:Number=1;i<6;i++)
{
removedObject = stack.pop();
trace(removedObject.toString()+" popped");
stack.print();
}
}
// catch exception if stack empty when item popped
catch (emptyListError)
{
emptyListError.messageTrace();
}
output出的结果：
/=======begin of the stack table ===========true
\=========end of the stack table ===========/
/=======begin of the stack table ===========12324
true
\=========end of the stack table ===========/
/=======begin of the stack table ===========hello
12324
true
\=========end of the stack table ===========/
/=======begin of the stack table ===========undefined
hello
12324
true
\=========end of the stack table ===========/
undefined popped
/=======begin of the stack table ===========hello
12324
true
\=========end of the stack table ===========/
hello popped
/=======begin of the stack table ===========12324
true
\=========end of the stack table ===========/
12324 popped
/=======begin of the stack table ===========true
\=========end of the stack table ===========/
true popped
Empty stack
An EmptyListError:The stack is empty
