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Google chose Kotlin as an official language for android app development along with Java and C++ at its annual I/O in 2017. Google doesn’t intend to get rid of the entire Java ecosystem, although it sure wishes it could. Java is a near-universal programming language, but whether android developers dread it, run from it, the need for Java still arises in one form or the other. Google does not intend to replace Java by introducing Kotlin to Android app development with Kotlin.