使用Array.sort（）对字节数组进行排序

Question

Really stupid question, but I'm a bit stuck on this one:

byte[] bytes = new byte[]{1, 2, 3};
Arrays.sort(bytes, (byte a, byte b) -> 0);

Why isn't the lambda matching any methods of Array.sort and how can I fix it?

Answer 1

I guess you're trying to use Arrays.sort(T[] a, Comparator<? super T> c) , so the problem is that byte isn't a T , because it's a primitive type. I guess this would work with Byte instead.

Answer 2

There are no sort methods accepting an array of primitive values and a Comparator . Only arrays of objects can be sorted with a comparator unfortunately.

Try

Byte[] bytes = new Byte[] { 1, 2, 3 };
Arrays.sort(bytes, (Byte a, Byte b) -> 0);