Your question is probably more suitable for the "New to Java" Forum
http://forum.java.sun.com/forum.jspa?forumID=54
And, using a more descriptive subject than "Hi,,,,,,,,,,,,," is also recommended!
Anyway, to find out which version of the JDK you are using, run the command
java -version
if the bin directory of your JDK installation is in your path (otherwise you will need full path to the java executable).
The currently newest JDK 6 release is 1.6.0_U1:
Java(TM) SE Runtime Environment (build 1.6.0_01-b06)
I think pre-release (for example beta) versions have build numbers "build 1.6.0-b104" or lower.