It has only adopted Java 7 features which are either syntactic sugar or library extensions. (E. g. everything where the Java class file version wouldn't have ma

It has only adopted Java 7 features which are either syntactic sugar or library extensions. (E. g. everything where the Java class file version wouldn't have mattered anyway). Java 8 (and Java 9 and Java 10) are completely different, with huge, mandatory changes to the class file format and the virtual machine.