Earlier quoted context omitted.
Java has been broadly used in HPC and low-latency trading software for years now. That's not only because much more attractive time-to-market but also because in many cases Java is on par with c/cpp when it comes to performance. Sometimes even better. I'm under the impression that you are not interested in educating yourself on the topic, however if I'm mistaken, have a look at some reasons why Java can be as fast or…
I've used Java in the enterprise plenty. Not a fan. And no, it's really never faster than properly written C/C++. And no, the actual HFT stuff is written in C++.
This is how I know you have no idea what you're talking about.
Source: been working on low-latency HFT Java apps for shops like Goldman Sachs, Morgan Stanley, UBS and others for 10+ years.
Not going to reply any more. Not worth it.