Kotlin Foundations

Kotlin reduces boilerplate without giving up JVM compatibility. It is often chosen when teams want modern syntax, better null safety, and Java interoperability.

Use cases

  • Android apps and mobile UI layers.
  • Backend services on the JVM.
  • Shared business logic in multiplatform projects.
  • Java interop in existing enterprise systems.

What makes Kotlin different

  • Type inference reduces noise.
  • Null safety is part of the type system.
  • Extension functions let you add behavior without subclassing.
  • Coroutines offer a clear model for asynchronous work.

JVM fit

Kotlin compiles to bytecode and runs on the Java Virtual Machine. That means you can reuse libraries, call Java code, and gradually introduce Kotlin into existing systems.

Practice

  1. Write one sentence about why Kotlin is attractive for teams already using Java.
  2. List two projects where Kotlin is a better choice than plain Java.
  3. Write one note about the value of null safety for production code.