How do I create class to convert byte to hex string?

[keang]

You could use

String hex_value = String.format("0x%02x", i);

but it's not much better.

The best approach is to create a method in your own class which takes a byte as a parameter and returns the formatted string ie

private String toHex(byte val) {
    return String.format("0x%02x", i);
}