What does your code look like? It should start something like this:
package com.foo.mypackage;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class MyMIDlet .......
The class name can be anything, although it's not recommended you duplicate the names in the java.lang package.
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Eric Giguere
author/co-author of:
Mobile Information Device Profile for Java 2 Micro Edition: Professional Developer's Guide
Java 2 Micro Edition: Professional Developer's Guide PalmTM Database Programming: The Complete Developer's Guide