Eclipse will create the project org.eclipse.swt in your workspace. This project already has the required SWT JAR file, including source code for the SWT classes. Select the project that will be used ...

Eclipse provides support including fixes for security vulnerabilities. Also part of the Eclipse Adoptium Project is the AQavit quality verification test suite for Java implementations.

In the meantime, I've put the math3 source in a package in my project, and build with that rather than using the Apache jars. Not my preferred solution, but it works.