Javaにおけるcharとbyteの相互回転

public static byte[] getBytes(char[] chars) {
        Charset cs = Charset.forName("UTF-8");
        CharBuffer cb = CharBuffer.allocate(chars.length);
        cb.put(chars);
        cb.flip();
        ByteBuffer bb = cs.encode(cb);
        return bb.array();
    }

public static char[] getChars(byte[] bytes) {
        Charset cs = Charset.forName("UTF-8");
        ByteBuffer bb = ByteBuffer.allocate(bytes.length);
        bb.put(bytes);
        bb.flip();
        CharBuffer cb = cs.decode(bb);
        return cb.array();
    }

public static byte[] charToByte(char c) {
        byte[] b = new byte[2];
        b[0] = (byte) ((c & 0xFF00) >> 8);
        b[1] = (byte) (c & 0xFF);
        return b;
    }

public static char byteToChar(byte[] b) {
        char c = (char) (((b[0] & 0xFF) << 8) | (b[1] & 0xFF));
        return c;
    }