How to use JRE

[sunnyhawk]

Hello:
I am a novice in programming with JBuilder 3.
I tried one of the tutorials creating the usual Hello World program
I used the deployment wizard and generated a jar file.
When i want to run the same with jre in the test directory like:
jre -cp HelloWorld.jar hello.HelloWorld
It says
Unable to initiliase threads: cannot find class java/lang/Thread.
Could not create Java VM
Can someone please help.
Thanx
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