Kotlin was created circa 2010 as a result of Java's stagnation in Sun's dying days. Oracle has since increased investment in the platform. So Java's resurgence

Kotlin was created circa 2010 as a result of Java's stagnation in Sun's dying days. Oracle has since increased investment in the platform. So Java's resurgence and Kotlin's appearance are both a response to the same event rather than one causing the other.