How to convert byte array into Human readable format?

If all you want to do is see the numeric values you can loop through the array and print each byte:

for(byte foo : arr){
    System.out.print(foo + " ");
}

Or if you want to see hex values you can use printf:

System.out.printf("%02x ", foo);

If you want to see the string that the byte array represents you can just do

System.out.print(new String(arr));

byte[] byteArray = new byte[] {87, 79, 87, 46, 46, 46};

String value = new String(byteArray);

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