Median Calculator

I need a median calculator in Java. There is a given method you have to build with following criteria: Finds the median in the given array of numbers. The algorithm should use the * algorithm presented in the lecture and accept different group sizes for this. * * @param numbers * The unsorted array of number. Must not contain duplicates. * @param groupSize * The size of the groups the array should be split into. Will always * be an odd number between 3 and 9. * @param minArraySize * The minimal array size to perform a full algorithmic calculation. * If the requested array is smaller or equal the given size, the array * should just be sorted and the median returned directly. * @return The median of the numbers You can only get the money if the code passes an online test. I dont have any test cases.