Java Question Problem with create library for B4A

Hello,
I am new to java programming.
The goal is to build a library for barcode scanning based on: SUNMI's Barcode Scanner SDK Using Camera.
(LINK: https://developer.sunmi.com/docs/en-US/xeghjk491/ciceghjk502#h-method-2)
I am trying to create a library in B4A.
I followed the procedures in the forum.
The messages I receive are as below.
Can someone help me explain the error.

Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/javadoc/Doclet
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defin...


Thank you

JAVA PROJECT

Hello,
I am new to java programming.
The goal is to build a library for barcode scanning based on: SUNMI's Barcode Scanner SDK Using Camera.
(LINK: https://developer.sunmi.com/docs/en-US/xeghjk491/ciceghjk502#h-method-2)
I am trying to create a library in B4A.
I followed the procedures in the forum.
The java project is attached .
Can someone help me explain the error.

You need to configure B4A to use Java 8. SLC will not work with Java 11+.