iP JAR is still failing the smoke test

[damithc]

@Morninggloryyy Your iP JAR is still failing the smoke test

Reason: You are using the wrong Java version to compile the JAR file.

We are now starting the iP grading, but we will not be able to grade yours due to this problem. Please fix ASAP.

[Morninggloryyy]

Hi Prof, so sorry about it! The current version I am using is java 11. May I know how I can change it to solve this issue? Thank you so much!

[Morninggloryyy]

@damithc The screenshots have been attached above. Thank you!

[damithc]

@Morninggloryyy Use this approach to create the JAR file

[Morninggloryyy]

@damithc Thank you so much prof! I have fixed it and released a new version jar file in github.