Would process with more threads on JVM have more cpu time than process with one thread?

Would process with more threads on JVM have more cpu time than process
with one thread?

Based on the question on Linux, this is effective way to hogging the CPU
until 2.6.38. How about JVM? Assume we have implemented the lock free
algorithm, all these threads are totally independent from each other. Will
more threads help us to gain more CPU time from the system?