Omegaup Java Test Cases

Hi I am trying to make a contest on omegaup for a class of students with questions based on java, but dont know how to set up java test cases on it for the problems. I know how to do it for C, but not java. I know you have to put .in and .out files in a cases folder, but like how does this work? I made the test cases in junit5 and it works fine, but I just dont know how to put java test cases on omegaup using the certain format they ask for. Any help would be gladly appreciated. Thanks. https://omegaup.com/