Mega Code Archive
Utility method to convert byte array to hex-encoded string
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/*
* Copyright WizTools.org
* Licensed under the Apache License, Version 2.0:
* http://www.apache.org/licenses/LICENSE-2.0
*/
//package org.wiztools.commons;
/**
* Utility method to convert byte array to hex-encoded string.
* @author subwiz
*/
public final class HexEncodeUtil {
final static String pseudo[] = {"0", "1", "2",
"3", "4", "5", "6", "7", "8",
"9", "a", "b", "c", "d", "e",
"f"};
private HexEncodeUtil(){}
/**
* This logic is based on the tip published by Jeff Boyle
* here: http://www.devx.com/tips/Tip/13540
* @param input byte[] input to convert
* @return Hex representation of the input
*/
public static String bytesToHex(byte input[]) {
if (input == null || input.length <= 0) {
return null;
}
final StringBuilder out = new StringBuilder(input.length * 2);
for(int i=0; i<input.length; i++) {
byte ch = (byte) (input[i] & 0xF0); // Strip off high nibble
ch = (byte) (ch >>> 4);
// shift the bits down
ch = (byte) (ch & 0x0F);
// must do this is high order bit is on!
out.append(pseudo[(int) ch]); // convert the nibble to a String Character
ch = (byte) (input[i] & 0x0F); // Strip off low nibble
out.append(pseudo[(int) ch]); // convert the nibble to a String Character
}
return out.toString();
}
}
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