Java generics with multiple parameters

I have seen examples on the site that deal with generics with multiple parameters but none that work for my situation. So here is the deal: I am trying to learn Java generics and have decided to create a simple binary array search utility function. I am testing it out using custom objects and integers. To get feedback on errors and warning I am using Eclipse. Here is what I have: ``` public static int binarySearch(Comparable[] array, Comparable item, int start, int end) { if(end < start) { return -1; } int mid = (start + end) / 2; if(item.compareTo(array[mid]) > 0) { return binarySearch(array, item, mid + 1, end); } else if(item.compareTo(array[mid]) < 0) { return binarySearch(array, item, start, mid - 1); } else { return mid; } } ``` So obviously I get the warnings for Raw types saying the generics should be parameterized. How can I do this correctly given that I have multiple parameters which both need to be the same type? SOLUTION Here is the working solution using generics with the correct parameter checks: ``` public static <T extends Comparable<? super T>> int binarySearch(T[] array, T item, int start, int end) { if(array.length == 0) { return -1; } if(item == null) { return -1; } if(start < 0) { return -1; } if(end < start) { return -1; } int mid = (start + end) / 2; if(item.compareTo(array[mid]) > 0) { return binarySearch(array, item, mid + 1, end); } else if(item.compareTo(array[mid]) < 0) { return binarySearch(array, item, start, mid - 1); } else { return mid; } } ```