JavaFX inWM6.5 / Download a file from internet

hi, im very new to Java,
im working on a very sample JFX script which should be able to download a file from internet to a WM6.5 mobile device,
but i found mobile device not supporting jFileChooser...
so how can i select the local of the output file?

and here is the code... i simply modified from Rakesh Menon work which we can find it at http://blogs.sun.com/rakeshmenonp/entry/javafx_upload_and_download_large

import javafx.io.http.HttpRequest;

import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.control.Button;

var var$toRead:Number;
var var$read:Number;
var var$msg:String="Download";
 
var stage$1:Stage;
var button$1:Button;

stage$1=Stage{
        scene:Scene{
		width:320
		height:240
		fill:Color.BLACK
		content:[
			button$1=Button{
					    translateX:bind(stage$1.width - button$1.width)/2
					    translateY:bind(stage$1.height - button$1.height)/2
					    text:bind "{var$msg}"
					    action:function(){
						    button$1.disable=true;
						    var jFileChooser = new javax.swing.JFileChooser(); // HERE IS THE PROBLEM! work prefect on desktop but have a problem on mobile device
						    var var$outputFile = jFileChooser.showSaveDialog(null);
						    if(var$outputFile == javax.swing.JFileChooser.APPROVE_OPTION) {
							    	downloadFile(jFileChooser.getSelectedFile());
								var$toRead = 0;
								var$read = 0;
						    }
					    }
			}
		]
	}
}