Connection refused--while executing (HttpConnection) Connector.open(url);

Question

Hi,
i'm using netbeans mobility 5.0
as i was new to this mobile programming i'm getting the output as "Connection Refused"
plz plz plz plz....... help me out from this problem
here is my code..
code:_
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.io.*;
import java.io.*;
public class FileViewer extends MIDlet implements CommandListener
private Display display; // Reference to Display object
private TextBox tbViewer; // View file contents in a textbox
private Command cmView; // Command to view file
private Command cmExit; // Command to exit
private String url = "http://www.corej2me.com/midpbook_v1e1/scratch/fileViewer.hlp";
public FileViewer()
display = Display.getDisplay(this);
// Define commands
cmView = new Command("View", Command.SCREEN, 2);
cmExit = new Command("Exit", Command.EXIT, 1);
tbViewer = new TextBox("Viewer", "", 250, TextField.ANY);
tbViewer.addCommand(cmView);
tbViewer.addCommand(cmExit);
tbViewer.setCommandListener(this);
public void startApp()
display.setCurrent(tbViewer);
private void viewFile() throws IOException
HttpConnection http = null;
InputStream iStrm = null;
try
http = (HttpConnection) Connector.open(url);
// Client Request
// 1) Send request method
http.setRequestMethod(HttpConnection.GET);
// 2) Send header information (this header is optional)
http.setRequestProperty("User-Agent", "Profile/MIDP-1.0 Configuration/CLDC-1.0");
// 3) Send body/data - No data for this request
// Server Response
// 1) Get status Line
System.out.println("Msg: " + http.getResponseMessage());
System.out.println("Code: " + http.getResponseCode());
// 2) Get header information
if (http.getResponseCode() == HttpConnection.HTTP_OK)
// 3) Get data (show the file contents)
iStrm = http.openInputStream();
int length = (int) http.getLength();
if (length > 0)
byte serverData[] = new byte[length];
iStrm.read(serverData);
tbViewer.setString(new String(serverData));
finally
if (iStrm != null)
iStrm.close();
if (http != null)
http.close();
public void pauseApp()
public void destroyApp(boolean unconditional)
public void commandAction(Command c, Displayable s)
if (c == cmView)
try
viewFile();
catch (Exception e)
System.out.println(e.toString());
else if (c == cmExit)
destroyApp(false);
notifyDestroyed();
output*
build.xml(debug)*
some....
Application descriptor does not declare any MIDlet. Direct execution is not allowed.
Generated "C:\Documents and Settings\Lakshmi Narayan J\jlnexample\dist\jlnexample.jar" is 2655 bytes.
post-jar:
debug:
C:\Documents and Settings\Lakshmi Narayan J\jlnexample\src\.timestamp
Starting emulator in debug server mode on port 1469
com.sun.kvem.midletsuite.InvalidJadException: Reason = 22
The manifest or the application descriptor MUST contain the attribute: MIDlet-1
nbdebug:
KdpDebugTask connecting to debugger 1 ..
KdpDebugTask connecting to debugger 2 ..
KdpDebugTask connecting to debugger 3 ..
KdpDebugTask connecting to debugger 4 ..
KdpDebugTask connecting to debugger 5 ..
Connecting JPDA Debugger to emulator timed out after 5 attempts and 31 seconds.
C:\Documents and Settings\Lakshmi Narayan J\jlnexample\nbproject\build-impl.xml:306: The following error occurred while executing this line:
C:\Documents and Settings\Lakshmi Narayan J\jlnexample\nbproject\build-impl.xml:311: Connecting JPDA Debugger to emulator timed out after 5 attempts and 31 seconds.
BUILD FAILED (total time: 43 seconds)
Debugger console:
Attaching to localhost:1469
Connection refused.
Edited by: LAKSHMI_NARAYAN_J on Jun 23, 2008 9:54 AM

Answer 1

It's called potential deadlock. The emulator blocks your app 'cause any connection and commandAction needs its own thread. So I suggest use a new thread with this http connection then your program will be run successful.