Java and Kotlin both have advantages and disadvantages. As far as usability goes, both are statically written, object-oriented languages. The creators of Kotlin have intentionally removed some of Java’s inadequacies and replaced them with something better. Arguably, this gives Kotlin an edge on usability. However, Java has been the choice for learning programming for decades. Even if Kotlin does offer some improvements on Java, it can’t take its place. Indeed, the two seem to be similar where ease-of-use is concerned.