Use APKPure App
Get Java9 old version APK for Android
This app will help you to learn java9 in a simple way
Java9 is the major version of java. it contains some important topics
like
1) Private methods inside an interface
2) Try with resource enhancement
3) Diamond resource enhancement
4)Safe Varags Annotation enhancement
5)Factory methods for creating unmodified collections
6)Stream API enhancement
7)JShell
8)The Java Platform Module System(JPMS)
9)JLink
10)Process API updates
11)Http/2Client