J2ME VS Android VS iPhone VS Symbian VS Windows CE

I have very little idea about mobile platforms, though I am interested to program for them.

Would you please compare J2ME VS Android VS iPhone VS Symbian VS Windows CE.

I would like to know:

• which one is better
• which one should I choose and why
• if there is any VM technology to test the programs
• is there any IDE, debugging facilities?

Personally, I would like to code for open source, but any suggestions are welcome. I have preliminary knowledge on Java. I would also like to know, if there is anything else that you can recommend.

There's several of these questions floating around on SO already... the most popular seems to be this one: what mobile platform should I start learning?

Quicky from the accepted answer over there (I edited a bit):

I think 3-4 platform have a future. But depends what platform do you like and how you like freedom in distribute your applications :)

1. Windows Mobile
   • C++ or .NET
   • free distribution, just like normal applications or through market
   • You need a Windows PC to develop
   • proprietary
2. Android
   • Java
   • Open Source
   • through Android Market ($25 one-time fees) or like normal applications
   • The platform is completely open source
3. iPhone
   • Objective-C or Java (Developing iPhone Applications using Java)
   • through iPhone Market ($99/year fees)
   • You need Mac (Mac OS) for development
   • proprietary
4. Java
   • J2ME or JavaFX
   • largely open source

My personal thoughts are: Symbian's dead; Windows Mobile will die, but take a long time; Android will become the standard in the next few years; iPhone will remain trendy in coming years, but NOT take be the biggest player; Pre/WebOS will maintain a niche market, but not be wildly sucessfull, Blackberry will decline, but still be around forever. I'd probably put my time/money into Android or iPhone at this point.