flash Ö® URLLoader

var loader:URLLoader = new URLLoader();
loader.addEventListener(ProgressEvent.PROGRESS, handleProgress );
event:ProgressEvent     event.bytesLoaded/event.bytesTotal
var streamer:URLStream = new URLStream( );
streamer.addEventListener( ProgressEvent.PROGRESS, handleProgress );
streamer.load(new URLRequest("example.txt"));
var streamer:URLStream = URLStream( event.target );
streamer.bytesAvailable/read***  
var request:URLRequest = new URLRequest("process.cfm");
var variables:URLVariables = new URLVariables();
request.data = variables;
sendToURL(request);
//open a new url
navigateToURL(request, "_blank" );
//return value
var variables:URLVariables = new URLVariables( );
variables.method = "getProductDetail"
variables.productId = 2;
request.data = variables;
loader.dataFormat = DataFormat.VARIABLES;
loader.addEventListener(Event.COMPLETE, handleComplete);
loader.load(request);
var loader:URLLoader = URLLoader( event.target );
loader.data.productId
  long start = System.currentTimeMillis();
  long initMem=Runtime.getRuntime().totalMemory();
  ......
  long end = System.currentTimeMillis(); 
  System.out.println("usedTime:"+(end - start)/1000);
 
  long freeMem=Runtime.getRuntime().freeMemory();
  System.out.println("usedMem:"+(initMem-freeMem)/(1024*1024));