The group session of today (18.09.2024) is canceled due to illness. Sorry for the inconvenience. However, you can still use the time to work on your own or with your peers on the exercises. Solutions to the exercises will be posted later in the week.
A reliable source for learning more about Java is JDK documentation. For concurrency in Java, one can e.g., go further in the web pages and check Concurrency, however, this might not be up to date according to the latest version of Java.
The exam is scheduled on the 28th of November. At the moment it is undecided if the exam will be written or oral, this will be decided later, depending on the number of students that will take the exam.