Java 24 adds several new features to the language, such as the availability of the Stream Gatherers API and Class-File API, ...

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.

Since I have done most of my coding for classes (and almost exclusively in Java), I have always just run my programs through the compiler and never had to worry about actually setting it up to run ...