Java Utililty Methods Hex Convert To

List of utility methods to do Hex Convert To

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Description

The list of methods to do Hex Convert To are organized into topic(s).

Method

bytefromHex(final String hex)
from Hex 
if (hex == null)
    throw new IllegalArgumentException("Hex strings may not be null");
if (hex.length() % 2 != 0)
    throw new IllegalArgumentException("Hex strings must have length 2");
return (byte) (dehex(hex.charAt(0)) << 4 | dehex(hex.charAt(1)));
intfromHex(final String hexValue)
from Hex 
return (int) Long.parseLong(hexValue, 16);
byte[]fromHex(final String s)
from Hex 
return fromHex(s.replace(" ", "").toCharArray());
byte[]fromHex(final String string, final int offset, final int count)
Converts the specified array of hex characters into an array of bytes (low byte first). 
if (offset >= string.length())
    throw new IllegalArgumentException("Offset is greater than the length (" + offset + " >= "
            + string.length() + ").");
if ((count & 0x01) != 0)
    throw new IllegalArgumentException("Count is not divisible by two (" + count + ").");
final int charCount = Math.min((string.length() - offset), count);
final int upperBound = offset + charCount;
final byte[] bytes = new byte[charCount >>> 1];
...
byte[]fromHex(String bytesString)
from Hex 
int len = bytesString.length() / 2;
if (bytesString.length() % 2 != 0) {
    throw new IllegalArgumentException("Bytes Hex string length has to be even number");
byte[] out = new byte[len];
for (int i = 0; i < len; i++) {
    int pos = i * 2;
    byte b = (byte) Integer.valueOf(bytesString.substring(pos, pos + 2), 16).intValue();
...
byte[]fromHex(String encoded)
Decode hex string to a byte array 
if (encoded == null)
    throw new NullPointerException();
int lengthData = encoded.length();
if (lengthData % 2 != 0)
    throw new IllegalStateException("bad string :" + encoded);
char[] binaryData = encoded.toCharArray();
int lengthDecode = lengthData / 2;
byte[] decodedData = new byte[lengthDecode];
...
byte[]fromHex(String hex)
from Hex 
if (hex.length() % 2 != 0) {
    hex = "0" + hex;
int byteCount = hex.length() / 2;
byte[] bytes = new byte[byteCount];
for (int i = 0; i < byteCount; i++) {
    int index = i * 2;
    char upper = hex.charAt(index);
...
byte[]fromHex(String hex)
Converts a string of hexadecimal characters into a byte array. 
byte[] binary = new byte[hex.length() / 2];
for (int i = 0; i < binary.length; i++) {
    binary[i] = (byte) Integer.parseInt(hex.substring(2 * i, 2 * i + 2), 16);
return binary;
byte[]fromHex(String hex)
Decodes a string of hex octets to a byte array. 
if (hex == null) {
    return null;
hex = hex.replace(" ", "");
if (hex.length() % 2 == 1) {
    return null;
byte[] bytes = new byte[hex.length() / 2];
...
intfromHex(String hex)
Returns the integer value of an hexadecimal number (base 16). 
return Integer.parseInt(hex, 16);