Java method to print Hexadecimal

private static String convertToHexString(byte[] data, String append) { StringBuffer buf = new StringBuffer(); for (int i = 0; i < data.length; i++) { int halfbyte = (data[i] >>> 4) & 0x0F; int two_halfs = 0; do { if ((0 <= halfbyte) && (halfbyte <= 9)) buf.append((char) ('0' + halfbyte)); else buf.append((char) ('a' + (halfbyte - 10))); halfbyte = data[i] & 0x0F; } while(two_halfs++ < 1); if(append != null) buf.append(append); } return buf.toString(); }



Another Similar program:
http://www.baeldung.com/sha-256-hashing-java
private static String bytesToHex(byte[] hash) {
StringBuffer hexString = new StringBuffer();
for (int i = 0; i < hash.length; i++) {
String hex = Integer.toHexString(0xff & hash[i]);
if(hex.length() == 1) 
hexString.append('0');
hexString.append(hex);
  //hexString.append(' ');
}
return hexString.toString();
}

Output:
System.out.println("HexText: "+bytesToHex(data));
HexText: 13 0a 63 00 14 00 12 00 09 37 38 36 31 32 33 34 35 36
You can use constructor of String, which takes byte array and character encoding

String str = new String(bytes, "UTF-8");

This is the right way to convert bytes to String, provided you know for sure that bytes are encoded in the character encoding you are using.

Read more: https://javarevisited.blogspot.com/2014/08/2-examples-to-convert-byte-array-to-String-in-Java.html#ixzz5kn8lnEZi

1. StandardCharsets.ISO_8859_1
2. StandardCharsets.US_ASCII
3. StandardCharsets.UTF_16
4. StandardCharsets.UTF_16BE
5. StandardCharsets.UTF_16LE

To view the Binary encoded Base64 in Hex String .... 

https://cryptii.com/pipes/base64-to-hex