Java, Python, SQL, C++, and JavaScript programming skills are most in demand in the workplace, says the HackerRank developer skills report.

The top programming languages that developers want to learn next are Go and Python, according to a survey by developer skills-matching platform HackerRank.

Java has a lot going for it, but it's not the top language for data science. Java professionals may want to familiarize themselves with Python or R for data science workflows.