Kotlin vs Java: Which will Succeed Android Development in Coming Times? We all know the importance of mobile applications in our lives. Android developers are often confused as to which programming language would acquire the scenario in future but Java is still favourite for most of the developers for android app development. But before that you must know the difference between Java and Kotlin. Android apps can be written in any language and can run on Java Virtual Machine whereas Kotlin is one such JVM compatible programming language that compiles down to Java bytecode and has really caught the attention of Android Community.