GUI, NullPointerException and WTK

Question

Hi There,
i wrote this simple application:
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class HighUI extends MIDlet {
     private Display display;
     private Form form;
     private TextField name;
     private TextField phone1;
     private TextField phone2;
     private TextField phone3;
     private Command exit;
     private Command submit;
     private List contact;
     public HighUI() {
          super();
          display = Display.getDisplay(this);
             form = new Form("Contact");
          name = new TextField("Nome:", null, 30, TextField.ANY);
          phone1 = new TextField("Tel1:", null, 15, TextField.PHONENUMBER);
          phone2 = new TextField("Tel2:", null, 15, TextField.PHONENUMBER);
          phone3 = new TextField("Tel3:", null, 15, TextField.PHONENUMBER);
          form.append(name);
          form.append(phone1);
          form.append(phone2);
          form.append(phone3);
          submit = new Command("Invia", Command.OK, 1);
          exit = new Command("Esci", Command.EXIT, 1);
          form.addCommand(submit);
          form.addCommand(exit);
          form.setCommandListener(public void commandAction(Command c, Displayable arg1) {
                    if (c == exit) {
                         notifyDestroyed();
                    } else if (c == submit) {
                         String nameValue = name.getString();
                         contact = new List(nameValue, List.IMPLICIT);
                         contact.append(phone1.getString(), null);
                         contact.append(phone2.getString(), null);
                         contact.append(phone3.getString(), null);
                         display.setCurrent(contact);
     protected void startApp() throws MIDletStateChangeException
        display.setCurrent(form);
    protected void pauseApp() { }
    protected void destroyApp(boolean arg0) throws MIDletStateChangeException { }
}...The code is correct... or atlast the compiler doesn't give me any error... Why when i start the application in the device-phone emulator i give this error in the console and the app doesn't start?
Project "HighUI" loaded
Running with storage root DefaultColorPhone
Unable to create MIDlet highui.HighUI
java.lang.ClassNotFoundException: highui/HighUI
     at com.sun.midp.midlet.MIDletState.createMIDlet(+14)
     at com.sun.midp.midlet.Selector.run(+22)
Execution completed.Thank you for answers :)
Bye bye
hawake
Edited by: hawake on Nov 27, 2007 12:39 PM

Answer 1

Hi, the previous error is correct now! :) Thank you!
But, another boring question, now I give another error with this source (corrected):
package highui;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class HighUI extends MIDlet {
     private Display display;
     private Form form;
     private TextField name;
     private TextField phone1;
        private TextField phone2;
     private TextField phone3;
     private Command exit;
     private Command submit;
     private List contact;
     public HighUI() {
          super();
          display = Display.getDisplay(this);
             form = new Form("Contact");
          name = new TextField("Nome:", null, 30, TextField.ANY);
          phone1 = new TextField("Tel1:", null, 15, TextField.PHONENUMBER);
          phone2 = new TextField("Tel2:", null, 15, TextField.PHONENUMBER);
          phone3 = new TextField("Tel3:", null, 15, TextField.PHONENUMBER);
          form.append(name);
          form.append(phone1);
          form.append(phone2);
          form.append(phone3);
          submit = new Command("Invia", Command.OK, 1);
          exit = new Command("Esci", Command.EXIT, 1);
          form.addCommand(submit);
          form.addCommand(exit);
          form.setCommandListener(this);
public void commandAction(Command c, Displayable arg1) {
                    if (c == exit) {
                         notifyDestroyed();
                    } else if (c == submit) {
                         String nameValue = name.getString();
                         contact = new List(nameValue, List.IMPLICIT);
                         contact.append(phone1.getString(), null);
                         contact.append(phone2.getString(), null);
                         contact.append(phone3.getString(), null);
                         display.setCurrent(contact);
     protected void startApp() throws MIDletStateChangeException
        display.setCurrent(form);
    protected void pauseApp() { }
    protected void destroyApp(boolean arg0) throws MIDletStateChangeException { }
}Error:
Project settings saved
Building "HighUI"
D:\Programmi\WTK22\apps\HighUI\src\highui\HighUI.java:33: setCommandListener(javax.microedition.lcdui.CommandListener) in javax.microedition.lcdui.Displayable cannot be applied to (highui.HighUI)
          form.setCommandListener(this);
              ^
1 error
com.sun.kvem.ktools.ExecutionException
Build failedThank you for answer!
Bye
hawake