I like to convert String to HEX byte array.
From something like that "example" to byte[] exampleconv = {0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65} (Source: http://www.asciitohex.com/).
I search for example also on stackoverflow but most of example convert code from string to decimal byte array or similar. I didnt find any working! example to convert string to hex byte array (like exampleHEX shows above).