Comparison of Java and Android API

This article compares the application programming interfaces (APIs) and virtual machines (VMs) of the programming language Java and operating system Android. While most Android applications are written in Java-like language, there are some differences between the Java API and the Android API, and Android does not run Java bytecode by a traditional Java virtual machine (JVM), but instead by a Dalvik virtual machine in older versions of Android, and an Android Runtime (ART) in newer versions, that compile the same code that Dalvik runs to Executable and Linkable Format (ELF) executables containing machine code.

Source: Wikipedia — Comparison of Java and Android API (CC BY-SA 4.0)