Java Removal Problem

I have recently been trying to tidy up and refresh my iBook. I was using AppCleaner and spotted multiple installations of Java. I thought, if I remove all of them, and just run Software Update it will notice that Java is missing and prompt me to install the latest release.
Needless to say, this has not happened!
I have no noticeable sign of Java on my computer apart from a few random folders. I noticed in the Update log file that "Java for Mac OS X 10.4, Release 9" was the last update, I manually downloaded and installed this from the Apple web-site. This has made no difference.
Can some one please advise me how to proceed?
Thank you in advanced.
Jamie

Can I not locate the missing files anywhere on the Internet?
I found this log file in AppCleaner:
/Applications/Utilities/Java/JSE 5.0/Java Preferences.app
~/Library/Preferences/com.apple.java.JavaPreferences.plist
/Applications/Utilities/Java/Java 1.3.1 Plugin Settings.app
/Applications/Utilities/Java/Java 1.4.2 Plugin Settings.app
/Applications/Utilities/Java/Java Web Start.app
/Library/Internet Plug-Ins/Java Applet.plugin
This is what I removed.
Thank you again.

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Thanks, that was helpfull,
here is the code up until the xmlDoc now
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com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract void org.developerworks.stocks.client.StocksService.displayMyItems(java.lang.String)' threw an unexpected exception: java.lang.ExceptionInInitializerError
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<Text Removed>
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<Text Removed>
     at com.google.gwt.core.client.GWT.create(GWT.java:91)
     at com.google.gwt.xml.client.impl.XMLParserImpl.<clinit>(XMLParserImpl.java:29)
     at com.google.gwt.xml.client.XMLParser.<clinit>(XMLParser.java:28)
     at org.developerworks.stocks.server.StocksServiceImpl.displayMyItems(StocksServiceImpl.java:359)
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Hello,
I am new to Java ME and I am trying to run a copied HelloMIDlet application. I am getting following error when I am trying to run the application:
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java.lang.NullPointerException
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I have another MIDlet in the same projects that works fine.
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Thank you in advance!
Best Regards,
Niklas

java.lang.NullPointerException
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...Try to modify your code about as follows:
private Ticker hi; // initialize ticker in startApp
/* don't override the MIDlet constructor
public HelloMIDlet() {
public void startApp() {
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Java Language problem: Multiple interfaces extension.

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Business Interface
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public interface ExtendedBeanLocal extends EJBLocalObject, ExtendedBeanInterface, BeanLocal {
public void newMethod();
}And THERE is where I hit the wall, because when I deploy the bean, the application server informs me that the resulting interface is throwing RemoteException (courtesy of ExtendedBeanInterface).
Accoring to my logic about Java Language, by extending BeanLocal, aMethod() shouldn't throw RemoteException as a result in ExtendedBeanLocal.
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