Help accessinf Form via HTTP

Question

Hi All,
I am triying to fill an form, without luck.
Some codes blocks my emulator.
Now I have an code which I got problem when I try to pass parameters.
If I use this code without passing paremters (teh variavels of filled in the form) its works ok.
I got the message:
"Uncaught exception java/lang/NullPointerException"
Can somebody help me??
Thanks in advance.
Here�s the code:
import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
Tento por um form neste treco
public class HttpContacts extends MIDlet implements CommandListener {
private Display mDisplay;
private Form mMainForm;
private StringItem mMessageItem;
private Command mExitCommand, mConnectCommand;
private TextField username, password;
public HttpContacts() {
mMainForm = new Form("Enter Username and Password");
mExitCommand = new Command("Exit", Command.EXIT, 0);
mConnectCommand = new Command("Connect",Command.SCREEN, 0);
username = new TextField("Username:", null, 30, TextField.ANY);
mMainForm.append(username);
password = new TextField("Password", null, 30, TextField.PASSWORD);
mMainForm.append(password);
mMainForm.addCommand(mExitCommand);
mMainForm.addCommand(mConnectCommand);
mMainForm.setCommandListener(this);
public void startApp() {
mDisplay = Display.getDisplay(this);
mDisplay.setCurrent(mMainForm);
public void pauseApp() {}
public void destroyApp(boolean unconditional) {}
public void commandAction(Command c, Displayable s) {
if (c == mExitCommand)
notifyDestroyed();
else if (c == mConnectCommand) {
Form waitForm = new Form("Waiting...");
mDisplay.setCurrent(waitForm);
Thread t = new Thread() {
public void run() {
     try {
          connect(username.getString(), password.getString());
//connect();
     catch (IOException ioe) {
          mMessageItem.setText(ioe.toString());
t.start();
private void connect(String username, String password) throws IOException {
HttpConnection hc = null;
InputStream in = null;
//String url = getAppProperty("HelloMIDlet.URL");
String url = "http://localhost:8080/midp/hits?" + "user=" + username + "&" + "pass=" + password;
try {
hc = (HttpConnection)Connector.open(url);
in = hc.openInputStream();
int contentLength = (int)hc.getLength();
byte[] raw = new byte[contentLength];
int length = in.read(raw);
in.close();
hc.close();
// Show the response to the user.
String s = new String(raw, 0, length);
mMessageItem.setText(s);
catch (IOException ioe) {
mMessageItem.setText(ioe.toString());
mDisplay.setCurrent(mMainForm);

Answer 1

Hi.I'd like to develop an application that interacts with a HTTP server. Can i develop and TEST the application in the UIQ emulator?or the testing part has to be done in the cell phone?Please help me.