Place the .class folder in a subdirectory of your project with the correct package structure. Refresh the project so that eclipse picks up the new directory.

When this program is compiled by javac, OpenJ9 runs the generated class file without any issues. However, when compiled using ecj, running the generated class file on OpenJ9 triggers a crash, while ...

Jakarta Enterprise Edition 9.1 allows developers to use Java SE 11 features in Jakarta EE applications and migrate Jakarta EE apps to Java SE 11 without changes.