Java Utililty Methods String Pad Zero

String zeroPad(final String s, final int fieldLength)
Prepend the given string with zeros.

return characterPad(s, fieldLength, '0', false);

String zeroPad(String encodeString, int padding)
Zero pad.

try {
 int v = Integer.parseInt(encodeString);
 String format = "%0" + padding + "d";
 return String.format(format, v);
} catch (Exception e) {
 return encodeString;

String zeroPad(String encodeString, int padding)
zero Pad

try {
 int v = Integer.parseInt(encodeString);
 String pad = String.valueOf(v);
 while (pad.length() < padding) {
 pad = "0" + pad;
 return pad;
} catch (Exception e) {
...

String zeropad(String number, int size)
zeropad

if (number.length() >= size)
 return number;
return repeat("0", size - number.length()) + number;

String zeroPad(String s, int fieldLength)
Prepend the given string with zeros.

char[] chArr = s.toCharArray();
int sLen = chArr.length;
if (sLen < fieldLength) {
 char[] out = new char[fieldLength];
 int zeros = fieldLength - sLen;
 for (int i = 0; i < zeros; i++) {
 out[i] = '0';
 for (int i = zeros; i < fieldLength; i++) {
 out[i] = chArr[i - zeros];
 return String.valueOf(out);
return s;

String zeropad(String s, int i)
zeropad

return padleft(s, i, '0');

String zeropad(String s, int len)
left pad with '0'

return padleft(s, len, '0');

String zeropad(String s, int len)
left pad with '0'

return padleft(s, len, '0');

String zeroPad(String s, int len)
=====================================================================================
This method is used to add padding "0" before a string so that the string has the expected length.

String result = s;
for (int i = s.length(); i < len; i++)
 result = "0".concat(result);
return result;

String zeroPad(String s, int length)
Pad string with leading zeros.

for (int i = s.length(); i < length; i++) {
 s = "0" + s;
return s;