Locate the output: The JAR files will be generated in build/libs/d8.jar and build/libs/r8.jar .
One of D8's main features is "desugaring"—allowing you to use Java 8+ language features (like Lambdas) on older Android versions. D8 handles this automatically if the class files are compiled with Java 8 compatibility. d8.jar download
This produces one or more .dex files inside dex_output/ . Locate the output: The JAR files will be