Hello there!
I just wanted to share a small piece of code I wrote way back in 2011 when I was working at my previous company. Yep, that was ages ago 🤭.
It’s a simple utility function I created to convert a byte[] into a hexadecimal String. Nothing fancy, but still useful even today!
public class Utils
{
private static String digits = "0123456789abcdef";
/**
* Return length many bytes of the passed in byte array as a hex string.
* @param data the bytes to be converted.
* @param length the number of bytes in the data block to be converted.
* @return a hex representation of length bytes of data.
*/
public static String toHex(byte[] data, int length)
{
StringBuffer buf = new StringBuffer();
for (int i = 0; i != length; i++)
{
int v = data[i] & 0xff;
buf.append(digits.charAt(v >> 4));
buf.append(digits.charAt(v & 0xf));
}
return buf.toString();
}
/**
* Return the passed in byte array as a hex string.
* @param data the bytes to be converted.
* @return a hex representation of data.
*/
public static String toHex(byte[] data)
{
return toHex(data, data.length).toUpperCase();
}
}
Its pretty simple code isn’t it? 😉
That’s all folks! Happy coding! 🥰😍
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