That's a task list of errors in your program. You need to click each one. The
IDE will take you to the error, with icons that explain the error. And you need to fix it.
Showing us the task list is pretty useless -- as we don't get any details about the error.
BTW, for a beginner, it is recommended to not use an IDE. An IDE takes care of tons of stuff, that a beginner needs to learn. I highly recommend that you use the standard javac compiler.
Henry