IntelliJ always checks all classes

Hello,
normally I use Eclipse for programming in Java. Unfortunately Eclips sometimes has some bugs, which is why I installed IntelliJ in the community edition.
Because I am still learning Java, I am currently rebuilding programs from various books. Usually there is a project for each book and a package for each chapter. This package contains the classes of the chapter. In Eclipse this also works without problems.
In IntelliJ, however, I have an unpleasant effect: When I want to start a class, IntelliJ always checks all classes in the project for syntax errors first. Even classes in other packages. This means that if there is an error in any class, then all other classes cannot be started either. Even if they have nothing to do with the "defective" class. Is there a possibility to deactivate this "overall check" somehow ?