Set the default JVM typeTag(s): Environment

> java -version

java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
Java HotSpot(TM) Client VM (build 1.5.0-b64, mixed mode, sharing)

From the Hot Spot FAQ at http://java.sun.com/docs/hotspot/HotSpotFAQ.html#compiler_types.

What's the difference between the -client and -server systems?
These two systems are different binaries. They are essentially two different 
compilers (JITs)interfacing to the same runtime system. The client system is 
optimal for applications which need fast startup times or small footprints, 
the server system is optimal for applications where the overall performance 
is most important. In general the client system is better suited for interactive 
applications such as GUIs. Some of the other differences include the compilation 
policy,heap defaults, and inlining policy.

Where do I get the server and client systems?
Client and server systems are both downloaded with the 32-bit Solaris 
and Linux downloads. For 32-bit Windows, if you download the JRE, you get 
only the client, you'll need to download the SDK to get both systems.

For 64-bit, only the server system is included. On Solaris, the 64-bit JRE 
is an overlay on top of the 32-bit distribution. However, on Linux and Windows, 
it's a completely separate distribution.

On Debian GNU/Linux with Sun Java 1.5.0, the file is in /etc/java-1.5.0-sun.
On Windows, it's in C:\Program Files\Java\jre1.5.0\lib\i386.

A content like

-client KNOWN
-server KNOWN

-server KNOWN
-client KNOWN