[java] How to check java bit version on Linux?

Possible Duplicate:
installed jvm is 64 bit or 32 bit

How do I check which bit version of Java is installed on my linux machine? When I type:

java -version

I get:

java version "1.6.0_16"
Java(TM) SE Runtime Environment (build 1.6.0_16-b01)
Java HotSpot(TM) Server VM (build 14.2-b01, mixed mode)

Is that 32bit or 64bit?

Why don't you examine System.getProperty("os.arch") value in your code?

Works for every binary, not only java:

file - < $(which java) # heavyly bashic

cat `which java` | file - # universal

Go to this JVM online test and run it.

Then check the architecture displayed: x86_64 means you have the 64bit version installed, otherwise it's 32bit.