Kotlin silently and reliably infers what is called a “platform type” that behaves exactly like a Java type, meaning that is nullable but can generate null-pointer exceptions.

Java may still be the first programming language that springs to mind when you think about Android, but you don’t have to use Java for Android development. In fact, Kotlin is now Google’s ...

Kotlin is similar to Java in many ways and runs on the Java Virtual Machine. It is 100% interoperable with Java, and thus there is no performance loss when choosing to use Kotlin for Android ...