How to convert hex string to Java string

Question

For logging purpose we are converting the logs to byte array and then to hex string  I want to get it back in a Java String  but I am not able to do so   The hex string in log file looks something like   fd00000aa8660b5b010006acdc0100000101000100010000   How can I decode this

User · Answer

First of all read in the data  then convert it to byte array    byte b   Byte parseByte str  16      and then use String constructor   new String byte   bytes     or if the charset is not system default then   new String byte   bytes  String charsetName

User · Answer

byte   bytes   javax xml bind DatatypeConverter parseHexBinary hexString   String result  new String bytes  encoding

User · Answer

Just another way to convert hex string to java string    public static String unHex String arg                 String str           for int i 0 i lt arg length   i  2                String s   arg substring i   i   2            int decimal   Integer parseInt s  16           str   str    char  decimal                   return str

User · Answer

Try the following code   public static byte   decode String hex            String   list hex split     lt    G  2              ByteBuffer buffer  ByteBuffer allocate list length           System out println list length           for String str  list              buffer put Byte parseByte str 16             return buffer array         To convert to String just create a new String with the byte   returned by the decode method

User · Answer

You can go from String  hex  to byte array to String as UTF-8     Make sure your hex string does not have leading spaces and stuff  public static byte   hexStringToByteArray String hex        int l   hex length        byte   data   new byte l   2       for  int i   0  i  lt  l  i    2            data i   2     byte    Character digit hex charAt i   16   lt  lt  4                    Character digit hex charAt i   1   16              return data     Usage  String b    quot 0xfd00000aa8660b5b010006acdc0100000101000100010000 quot   byte   bytes   hexStringToByteArray b   String st   new String bytes  StandardCharsets UTF 8   System out println st

User · Answer

Using Hex in Apache Commons   String hexString    fd00000aa8660b5b010006acdc0100000101000100010000       byte   bytes   Hex decodeHex hexString toCharArray     System out println new String bytes   UTF-8

[java] How to convert hex string to Java string?

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