Java Utililty Methods String Sub String

if (_idx >= 0) {
    if (_idx < _text.length()) {
        return _text.substring(_idx);
return "";

if (baseString == null)
    return null;
else if (start >= baseString.length() || start < 0 || end < 0 || start > end)
    return null;
else if (end >= baseString.length())
    return baseString.substring(start);
else {
    return baseString.substring(start, end);
...

int intStart = input.indexOf(String.valueOf(start));
if (intStart < 0) {
    return input;
intStart++;
String ret = input.substring(intStart);
int intEnd = ret.indexOf(String.valueOf(end));
if (intEnd < 0) {
...

String output = input;
if (input != null && input.length() > expectedLength) {
    output = input.substring(0, expectedLength);
return output;

if (input == null)
    return null;
else
    return (input.length()) <= maxLength ? input : input.substring(0, maxLength);

if (input == null) {
    return null;
if (maxLength < 0) {
    return input;
if (input.length() > maxLength) {
    return input.substring(0, maxLength);
...

try {
    int idxStart = input.indexOf(startStr);
    if (idxStart == -1)
        return "";
    int idxEnd = input.indexOf(endStr, idxStart + 1 + startStr.length());
    if (idxStart == -1 || idxEnd == -1)
        return "";
    return input.substring(idxStart + startStr.length(), idxEnd).trim();
...

if (name == null)
    return null;
String[] nameStr = name.split("_");
StringBuffer buffer = new StringBuffer();
for (int i = 2; i < nameStr.length; i++) {
    buffer.append(nameStr[i]);
    buffer.append("_");
String returnStr = null;
if (buffer.toString().endsWith("_")) {
    returnStr = buffer.toString().substring(0, buffer.toString().lastIndexOf("_"));
return returnStr;

if (origin == null || origin.equals("") || len < 1)
    return "";
byte[] strByte = new byte[len];
if (len > origin.getBytes().length) {
    return origin;
System.arraycopy(origin.getBytes(), 0, strByte, 0, len);
int count = 0;
...

int end;
boolean found = false;
for (end = 1; end < original.length(); end++) {
    if (original.substring(0, end).matches(regex)) {
        found = true;
    } else if (found)
        return original.substring(0, end - 1);
if (original.substring(0, original.length() - 1).matches(regex))
    return original.substring(0, original.length() - 1);
if (original.substring(0, original.length()).matches(regex))
    return original;
return "";