Java Utililty Methods String Split by Separator

List<String> result = new ArrayList<String>();
for (int i1 = 0; i1 < src.length();) {
    int i2 = src.indexOf(separator, i1);
    if (i2 < 0)
        i2 = src.length();
    String item = src.substring(i1, i2);
    if (trim)
        item = item.trim();
...

if (str.isEmpty()) {
    return new String[] { "" };
ArrayList<String> strList = new ArrayList<>();
int startIndex = 0;
int nextIndex = 0;
while ((nextIndex = str.indexOf(separator, startIndex)) != -1) {
    strList.add(str.substring(startIndex, nextIndex));
...

int pos = 0;
List list = new ArrayList();
int length = str.length();
for (int i = 0; i < length; i++) {
    char ch = str.charAt(i);
    if (ch == separator) {
        list.add(str.substring(pos, i));
        pos = i + 1;
...

if (str == null)
    return null;
if (str.length() == 0)
    return new String[0];
List splitList = new ArrayList();
int startPos = 0;
int endPos = str.indexOf(separator);
while (endPos != -1) {
...

return split(str, separator, false, -1, -1, false);

Splits the provided text into an array, separator specified.

if (str == null) {
    return EMPTY_STRING_ARRAY.clone();
int len = str.length();
if (len == 0) {
    return EMPTY_STRING_ARRAY.clone();
List<String> list = new ArrayList<String>();
...

if (str == null) {
    return null;
int length = str.length();
if (length == 0) {
    return EMPTY_STRINGS;
List<String> list = new ArrayList();
...

Splits the provided text into an array, separator specified.

if (str == null) {
    return null;
int len = str.length();
if (len == 0) {
    return EMPTY_STRING_ARRAY;
List list = new ArrayList();
...

Splits the provided text into an array, separator specified.

List<String> list = new ArrayList<String>();
if (str == null || str.length() == 0) {
    return list;
if (str.indexOf(separatorChar) == -1) {
    list.add(str);
    return list;
int start = 0;
for (int i = 0; i < str.length(); i++) {
    if (str.charAt(i) == separatorChar) {
        String token = str.substring(start, i).trim();
        if (token.length() > 0) {
            list.add(token);
        start = i + 1;
String token = str.substring(start, str.length()).trim();
if (token.length() > 0) {
    list.add(token);
return list;

if (str == null) {
    return null;
int length = str.length();
if (length == 0) {
    return new String[0];
List<String> list = new ArrayList<String>();
...