Java Utililty Methods String Sub String

List of utility methods to do String Sub String

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Description

The list of methods to do String Sub String are organized into topic(s).

Method

StringsubstringBetweenStrings(String within, String pre, String post)
substring Between Strings 
int from = within.indexOf(pre);
if (from < 0)
    return null;
from += pre.length();
int to = within.indexOf(post, from);
if (to < 0)
    return null;
return within.substring(from, to);
...
StringsubStringByByte(String orignal, int subcount)
sub String By Byte 
int reInt = 0;
String reStr = "";
if (orignal == null)
    return "";
char[] tempChar = orignal.toCharArray();
for (int kk = 0; (kk < tempChar.length && subcount > reInt); kk++) {
    String s1 = orignal.valueOf(tempChar[kk]);
    byte[] b = s1.getBytes();
...
StringsubStringByByte(String str, int byteLenth)
sub String By Byte 
if (str == null || "".equals(str))
    return str;
if (byteLenth <= 0)
    return str;
byte[] bs = str.getBytes();
if (bs.length <= byteLenth)
    return str;
int templengh = 0;
...
StringsubstringByByteCount(String str, int byteCount)
substring By Byte Count 
byte[] bytes = str.getBytes();
if (bytes.length <= byteCount) {
    return str;
int strIndex = 0;
for (int i = 0; i < bytes.length;) {
    int len = utf8Len(bytes[i]);
    if (i + len <= byteCount) {
...
StringsubStringByBytes(String str, int toCount, String more)
sub String By Bytes 
int reInt = 0;
StringBuilder reStr = new StringBuilder();
char[] tempChar = str.toCharArray();
for (int kk = 0; kk < tempChar.length; kk++) {
    char c = tempChar[kk];
    byte[] b = String.valueOf(c).getBytes();
    reInt += b.length;
    if (toCount >= reInt) {
...
StringsubstringByCodePoint(String inputStr, int codePointStart, int codePointEnd)
Returns a substring of the input string based on the input code points 
int charOffsetStart = convertCodePointOffsetToCharOffset(inputStr, codePointStart);
int charOffsetEnd = convertCodePointOffsetToCharOffset(inputStr, codePointEnd);
return inputStr.substring(charOffsetStart, charOffsetEnd);
StringsubstringByMask(String baseString, String baseMask, String subMask)
substring By Mask 
if ((baseString == null) || (baseMask == null) || (subMask == null)) {
    return null;
} else if (isEmpty(baseString))
    return baseString;
else {
    String ls_Return = "";
    int li_Pos = 0;
    while (li_Pos >= 0) {
...
StringsubStringByte(String str, int toCount, String more)
sub String Byte 
if (str != null && toCount > 0) {
    if (str.length() > toCount) {
        str = str.substring(0, toCount - 1) + more;
    return str;
} else {
    return "";
StringsubstringBytes(String value, int byte_len)
substring Bytes 
int retLength = 0;
int tempSize = 0;
for (int index = 1; index <= value.length(); index++) {
    int asc = value.charAt(index - 1);
    if (asc > 127) {
        if (byte_len >= tempSize + 2) {
            tempSize += 2;
            retLength++;
...
booleansubstringCompare(String string, int index, char... characters)
Check if the given character sequence is located in the given string at the specified index. 
if (string.length() <= index + characters.length)
    return false;
for (char character : characters) {
    if (string.charAt(index) != character)
        return false;
    index++;
return false;
...