Android Studio is available from Android’s developer site at developer.android.com/​studio. It includes everything you need to build and run Android applications, including a built-in installation of the Java Development Kit.

If you want to build and compile Android apps from somewhere outside Android Studio, such as from the command line, you need to have a local installation of the Java Development Kit. The latest version of the Android Gradle plugin, which is the tool that builds and compiles Android apps, requires Java 11. More recent versions of the Java Development Kit should also work just fine. If you are having problems, return to developer.android.com/​studio for more information.