Java byte []数组中项目的相反顺序

Question

i have a problem reversing the order of items in a bytearray correctly. I want to flip the following String to the one below:

original "\Я\Ґ\И\в\е\т"

flipped "\т\е\в\И\Ґ\Я"

I tried someonething like this, but this doesn't work.

public byte[] invert(byte[] input) {
    ByteBuffer bb = ByteBuffer.wrap(input);
    bb.order(ByteOrder.LITTLE_ENDIAN);
    byte[] b = bb.array();
    return b;
}

any ideas?

Answer 1

This will do what your example shows you're looking for:

String reversed = new StringBuilder(str).reverse().toString();

You may need to decode a byte[] to a String , and then encode the reversed String back to a byte[] using the correct character encoding.

Answer 2

Don't try to treat Unicode characters as bytes! The simplest way to do this is create a String ( String(byte[]) ) get the characters ( String.toCharArray() ) and write them into a char[] in reverse order, then go back to a byte array via a String again.