如何对字节数组的集合进行Collections.binarySearch？

Question

This does not work:

List<byte[]> byteArrayList = .... ;
Collections.binarySearch(byteArrayList, new ByteArrayComparator());

because byte[] does not extend Comparable. Why isn't it enough that a Comparator is provided? Any tricks?

Ups, error, i was sure I had the search term inside...

Answer 1

As it stands, you're searching the list of byte arrays for a comparator. It looks like you're calling the wrong binarySearch method, ie this instead of this .

Try this:

List<byte[]> byteArrayList = .... ;
byte[] valueToFind = .... ;
int index = Collections.binarySearch(byteArrayList,
                                     valueToFind,
                                     new ByteArrayComparator());