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Javin Javin Paul is a Java programmer, blogger on http://javarevisited.com and http://java6767.com. He shares his 3 best programming languages for Java Developers: Scala, Kotlin, Groovy, and Kotlin. Learning a new language gives you the experience and knowledge to compare the pros and cons of two programming languages, which essentially enables you to write better code. Most of the languages I suggest Java developers learn are JVM-based because they are easier to learn for Java programmers.