In 2025, Java continues to be a reliable and well-supported option for mobile app developers, particularly those targeting the Android ecosystem.

In this tutorial we go through the steps needed to build your first Android app. You will create a simple UI, add some Java code, and then run your app.

Here's what Meta's developers have learned from moving their code base from the Java programming language over to Kotlin.

Java vs C app performance - Gary explains Java is the official language of Android, but you can also write apps in C or C++ using the NDK. But which language is faster on Android?

That came as a bit of a surprise, given that Java had long been the preferred language for Android app development, but few announcements at that year’s I/O got more applause.