Java Utililty Methods ASCII to Hex

List of utility methods to do ASCII to Hex

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Description

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

Method

byte[]ascii2Hex(byte[] in)
ascii Hex 
byte[] temp1 = new byte[1];
byte[] temp2 = new byte[1];
int i = 0;
byte[] out = new byte[in.length / 2];
for (int j = 0; i < in.length; j++) {
    temp1[0] = in[i];
    temp2[0] = in[(i + 1)];
    if ((temp1[0] >= 48) && (temp1[0] <= 57)) {
...
voidAscii2Hex(int len, byte data_in[], byte data_out[])
Ascii Hex 
byte temp1[] = new byte[1];
byte temp2[] = new byte[1];
for (int i = 0, j = 0; i < len; j++) {
    temp1[0] = data_in[i];
    temp2[0] = data_in[i + 1];
    if (temp1[0] >= '0' && temp1[0] <= '9') {
        temp1[0] -= '0';
        temp1[0] = (byte) (temp1[0] << 4);
...
byte[]asciiToHex(byte[] src, int len, int padding)
ascii To Hex 
byte[] bcd = new byte[len];
byte[] asc = null;
if (padding == 0) {
    asc = lpBytes(src, len * 2, (byte) 0x30);
} else {
    asc = rpBytes(src, len * 2, (byte) 0x30);
for (int i = 0; i < len; i++) {
...
StringASCIIToHex(int args, int len)
ASCII To Hex 
String str = Integer.toHexString(args);
if (str.length() < len) {
    while (str.length() < len) {
        if (str.length() == len) {
            return str;
        str = "0" + str;
return str.toUpperCase();
StringasciiToHex(String ascii)
ascii To Hex 
if (ascii == null)
    throw new NullPointerException();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < ascii.length(); i++) {
    int asciiCode = ascii.charAt(i) & 0xFF;
    sb.append(String.format("%02x", asciiCode));
return sb.toString();
...
StringasciiToHex(String ascii)
Converts an ascii string into a string containing its hex value. 
StringBuffer hex = new StringBuffer();
if (ascii == null) {
    return null;
for (int i = 0; i < ascii.length(); i++) {
    char aChar = ascii.charAt(i);
    int ndx = (aChar >> 4) & 0x000f;
    hex.append(hexChars[ndx]);
...
StringasciiToHex(String ascii)
convert ascii String into hexa String 
StringBuilder hex = new StringBuilder();
for (int i = 0; i < ascii.length(); i++) {
    hex.append(Integer.toHexString(ascii.charAt(i)));
return hex.toString();
StringasciiToHex(String asciiValue)
ascii To Hex 
char[] chars = asciiValue.toCharArray();
StringBuffer hex = new StringBuffer();
for (int i = 0; i < chars.length; i++) {
    hex.append(Integer.toHexString(chars[i]));
return hex.toString();
StringasciiToHexStr(String src)
ascii To Hex Str 
StringBuilder sBuilder = new StringBuilder();
for (int i = 0; i < src.length(); i++)
    sBuilder.append(String.format("%02X", Integer.valueOf(src.charAt(i))));
return sBuilder.toString();