Success

admins@opensource:~$ cd jabref
admins@opensource:~/jabref$ ./gradlew assemble

> Configure project :
Found module name 'org.jabref'

> Task :compileJava
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/6.0.1/userguide/command_line_interface.html#sec:command_line_warnings

BUILD SUCCESSFUL in 11m 17s
12 actionable tasks: 12 executed
admins@opensource:~/jabref$