Just type following command “java -version” inside command Prompt.
C:code>java -version
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode)
It will return you the version you are using.
It will also mention Operating system type. (It shows that OS is 64 bit).
"Hi there, My name is Anup Maurya. I have a passion for programming and previously worked at TCS, one of the best global IT services and consulting companies, as a System Administrator. I also enjoy graphic design. It's a pleasure to have you here."