how i write java game

Dear Canmelezoglu, 

Here are several tutorials that would teach you to write a game: 

Fabian Birzele The Java Game Development Tutorial
<http://javaboutique.internet.com/tutorials/Java_Game_Programming/> 

Java Game Programming Tutorial 
<http://www.javacooperation.gmxhome.de/> 

About.com: Game / Multimedia Programming
<http://java.about.com/od/gamegraphicsprogramming/> 

I hope this answers your question. Please contact me if you need any
clarification on this answer before you rate it. My search terms were:
The Java Game Development Tutorial 
"how to write" "java game"

I would suggest that you search for a GDK (game development kit). Most
of the GDK's that are out now use some kind of java programming.
Thanks,
PCMD