Java Wireless Toolkit Setup Help Needed

Question

I am interseted in mobile application development, and I have recently tried to set up the Java Wireless toolkit 2.0 on my laptop.
I have spent gours trying to get it to work correctly - still nothing!!
When it's all installed, I have opened up the sample projects -- e.g. Games.
When I hit 'Build' I am given the following error:
Project "games" loaded
Project settings saved
Building "games"
C:\WTK20\apps\games\src\example\pushpuzzle\PushPuzzle.java:145: cannot access java.lang.StringBuilder
file java\lang\StringBuilder.class not found
alert.setString("Could not load level " +
^
com.sun.kvem.ktools.ExecutionException
Build failed
Can someone please tell me what to do?!?
Is it to do with setting the classpath?? How do I do that??
What other Java tools do I need to have prior to installing the Wireless toolkit?? JVM?? Where do I get this? How do I install it correctly and set paths correctly??
Any help would be HUGELY appreciated as I have downloaded so much stuff at this stage I have compleely confused myself!!

Answer 1

Hey.
Right, last night I downloaded the latest version of JDK - version 1.5.
I installed it successfully.
So in the folder C:\ Java there are two folders: Jdk-1.5_etc and JRE-1.5_etc.
Next I downloaded and installed the latest version of the wireless toolkit.
It saw that I had the JDK installed at th correct folder, and it installed at C:\WTK20 - said it installed correctly.
So, next I select create project - call it hello world.
Then I place the following code in the src folder of the helloWorld folder:
* Copyright 2000-2001 by Sun Microsystems, Inc.,
* 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
* All rights reserved.
package examples.helloworld;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class HelloWorld extends MIDlet implements CommandListener {
private Command exitCommand;
private TextBox tb;
public HelloWorld() {
exitCommand = new Command("Exit", Command.EXIT, 1);
tb = new TextBox("Hello MIDlet", "Hello, World!", 15, 0);
tb.addCommand(exitCommand);
tb.setCommandListener(this);
protected void startApp() {
Display.getDisplay(this).setCurrent(tb);
protected void pauseApp() {}
protected void destroyApp(boolean u) {}
public void commandAction(Command c, Displayable d) {
if (c == exitCommand) {
destroyApp(false);
notifyDestroyed();
I hit build and it builds correctly - no errors - YAY!!.
I hit run, the phone emulator pops up. I hit launch and:
An error pops up on the screen of the phone.
The error below appears in the Wireless toolkit window:
Project "HelloWorld" loaded
Project settings saved
Building "HelloWorld"
Build complete
Running with storage root DefaultColorPhone
Unable to create MIDlet HelloWorld
java.lang.ClassNotFoundException: HelloWorld
     at com.sun.midp.midlet.MIDletState.createMIDlet(+14)
     at com.sun.midp
I'm using version 1.5 of JDK - what have I not done - why won't it run.
I keep getting Java.lang errors!!!!
AAAGGGHHHHH!!!!!!!!!!!!!!!