Creating a unique timestamp in Java

Question

I need to create a timestamp (in milliseconds) in Java that is guaranteed to be unique in that particular VM-instance. I.e. need some way to throttle the throughput of System.cu

Answer 1

Could you perhaps make use of java.util.UUID and it's timestamp() and clockSequence()?

Method Summary
    int clockSequence() 
        The clock sequence value associated with this UUID.
    long timestamp() 
        The timestamp value associated with this UUID.

More details here: http://docs.oracle.com/javase/1.5.0/docs/api/java/util/UUID.html