platform independency of java

Hi guys
i want to know whether java is machine independent or OS independent.
Though we have different versions of JAVA runtime for different os's (linux, windows)
but suppose if i have 2 machines (say running Intel pIII 550) one having a windows os and the other having a linux os.
Will platform independency come into picture in this scenario or will it be the same output jre will interpret into in both the cases.
Say if i have 2 different processors (Intel & amd) with the same o/s (windows) .In this case will jre interpret the java byte code into 2 different types of machine language(processor being different)
Kindli can some 1 clarify whether java is processor independent or o/s independent

Java bytecode is machine-independent. The virtual machine used as the interpreter, however, is both machine-dependent and OS-dependent. Whoever maintains the VM code is the one who has to manage all the porting issues and such.

Hi Michael
Thanks for u r prompt reply. Just one more clarification. So can we say if we have a windows os on different machines (intel & amd) we will be having 2 different jre's or just 1 jre is available for 1 o/s & the o/s takes care how to communicate with the machine.

Originally posted by rak shar:
Hi Michael
Thanks for u r prompt reply. Just one more clarification. So can we say if we have a windows os on different machines (intel & amd) we will be having 2 different jre's or just 1 jre is available for 1 o/s & the o/s takes care how to communicate with the machine.

One JRE.