Yes, this is what I do, and it works perfectly. Please install OpenJDK 11.0.16 LTS, and using javc to compile DFLI.java to DFLI.class as follows.
$ javac -source 1.8 -target 1.8 DFLI.java
Finally, using WinRAR to open ro.amiq.dvt.flclient-2.11.jar file and replace the compiled DFLI.class. Besides, you should modify the ro.amiq.dvt_22.1.21.jar file as well.