Java Utililty Methods Binary to Hex

if (ba == null || ba.length == 0) {
    return null;
StringBuilder sb = new StringBuilder(ba.length * 2);
String hexNumber;
for (int x = 0, sz = ba.length; x < sz; x++) {
    hexNumber = "0" + Integer.toHexString(0xff & ba[x]);
    sb.append(hexNumber.substring(hexNumber.length() - 1));
...

StringBuilder sb = new StringBuilder(bytes.length * 2);
for (byte b : bytes) {
    sb.append(String.format("%02x", b & 0xff));
return sb.toString();

return binaryToHex(data, 0, data.length);

return binaryToChar(binaryStr, 4);

char ch = ' ';
switch (binary) {
case 0:
    ch = '0';
    break;
case 1:
    ch = '1';
    break;
...

String result = "";
String hex = "";
for (int i = 0; i < bytes.length; i++) {
    hex = String.valueOf(hexStr.charAt((bytes[i] & 0xF0) >> 4));
    hex += String.valueOf(hexStr.charAt(bytes[i] & 0x0F));
    result += hex;
return result;
...

return "0x" + Integer.toHexString(Integer.parseInt(binaryValue, 2)).toUpperCase();

StringBuffer buf = new StringBuffer();
for (int i = 0; i < bin.length; i++) {
    int value = bin[i] < 0 ? bin[i] + 256 : bin[i]; 
    buf.append(hexdigits.charAt(value / 16));
    buf.append(hexdigits.charAt(value % 16));
return buf.toString();

return binToHex(bytes, 0, bytes.length);

char[] hexChars = new char[data.length * 2];
for (int j = 0; j < data.length; j++) {
    int v = data[j] & 0xFF;
    hexChars[j * 2] = hexArray[v >>> 4];
    hexChars[j * 2 + 1] = hexArray[v & 0x0F];
return new String(hexChars);