关于#java#的问题，请各位专家解答！

Question

String hexString = "0123456789ABCDEF" ;
ByteArrayOutputStream baos = new ByteArrayOutputStream(ryQR.length() / 2);
for (int i = 0; i < ryQR.length(); i += 2)
baos.write((hexString.indexOf(ryQR.charAt(i)) << 4 | hexString.indexOf(ryQR.charAt(i + 1))));
String ryxm = new String(baos.toByteArray(),"UTF-16");

ryqr：王一

Answer 1

ryQR 少个东西