equivalent of memcmp() in Java?

Question

If I have two byte[] arrays, is there a built-in function to compare them ala C's memcmp() ?

Answer 1

There's Arrays.equals().

I don't know whether the JVM implementation actually optimizes this if a corresponding instruction exists in the hardware, but I doubt it.

Also, if I remember my C correctly, strcmp works up to a null terminator (making it useful for C strings), The Arrays version will compare the entire array since Java programmers rarely bother with null-terminated arrays. You could easily write your own function, though, if you care about the null-terminator.

Answer 2

[Arrays.equals][1]

[1]: http://java.sun.com/j2se/1.5.0/docs/api/java/util/Arrays.html#equals(byte[], byte[])

Answer 3

what about the equivalent for same in c#?

Answer 4

The java.util.Arrays.equals(byte[], byte[]) method is your friend.