Google wanted Android to be accessible to developers familiar with Java. Accordingly, although Google purchased or rewrote from scratch all the code that provides the functionality of Android, it ...

Android in 2006 Version 0.91 of the Google's project definition for Android, completed July 6, 2006, was not an open document. It is labeled "Google Proprietary" and "Highly Confidential." ...

In this Java 101 tutorial, I’ve explained how interfaces differ from classes, and showed you how to declare, implement, and extend interfaces in your Java programs.

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

Java lets you declare interfaces inside of classes. Once declared, an interface is automatically a static member of the class. There is no need to declare the interface with the static keyword.