[AS3]as3数组元素如何实现分页功能代码示例

用as3实现了数组元素的分页：
代码如下：
Page 类

package pages  
{  
        public class Page  
        {  
                private var array:Array;  
                private var _index:int;  
                private var _capacity:int = 0;  
                public function Page()  
                {  
                        array=new Array();  
                }  
                /**  
                 *添加  
                 * @param item  
                 *  
                 */  
                public function add(item:Object):void  
                {  
                        if (array.length < _capacity)  
                        {  
                                array.push(item);  
                        }  
                }  
                public function get capacity():int  
                {  
                        return _capacity;  
                }  
                /**  
                 *删除  
                 * @param index  
                 * @return  
                 *  
                 */  
 
                public function remove(index:int):Object  
                {  
                        var obj:Object = null;  
                        if (index in array)  
                        {  
                                obj = array.splice(index,1);  
                        }  
                        return obj;  
                }  
                /**  
                 *项目索引  
                 * @param item  
                 * @return  
                 */  
                public function indexOf(item:Object):int  
                {  
                        var index:int = -1;  
                        for (var i:int=0; i < array.length; i++)  
                        {  
                                if (item === array[i])  
                                {  
                                        iindex = i;  
                                        break;  
                                }  
                        }  
                        return index;  
                }  
                /**  
                 *页序号  
                 * @return  
                 *  
                 */  
                public function get index():int  
                {  
                        return _index;  
                }  
                public function set capacity(capacity:int):void  
                {  
                        if (capacity >= 0)  
                        {  
                               _capacity = capacity;  
                        }  
                }  
                /**  
                 *数量  
                 * @return  
                 *  
                 */  
                public function get count():int  
                {  
                       return array.length;  
                }  
                /**  
                 *是否为空  
                 * @return  
                 */  
                public function empty():Boolean  
                {  
                        return array.length == 0;  
                }  
                public function set index(value:int):void  
                {  
                        if (value >= 0)  
                        {  
                                _index = value;  
                        }  
                }  
                /**  
                 *项目集合  
                 * @return  
                 */  
                public function get items():Array  
                {  
                        return array;  
                }  
                /**  
                 *页的描述   
                 * @return   
                 */                  
                public function toString()  
                {  
                        return array.toString();  
                }  
        }  
}