Java Utililty Methods String Trim Right

int n = s.length() - 1;
if (n >= 0) {
    if (s.charAt(n) != ' ') {
        return s;
    while ((--n) >= 0) {
        if (s.charAt(n) != ' ') {
            return s.substring(0, n + 1);
...

if (s == null)
    return s;
int pos = s.length();
if (pos == 0)
    return s;
char last = s.charAt(pos - 1);
if (last > ' ')
    return s;
...

if (s == null)
    return null;
for (int k = s.length() - 1; k >= 0; k--) {
    if (!Character.isWhitespace(s.charAt(k)))
        return (k == s.length() - 1 ? s : s.substring(0, k + 1));
return "";

if (s == null) {
    return null;
int len = s.length();
int index = len;
while (index > 0 && Character.isWhitespace(s.charAt(index - 1))) {
    index--;
return (index <= 0) ? "" : s.substring(0, index);

StringBuffer buf = new StringBuffer(s);
for (int k = buf.length() - 1; k >= 0 && buf.charAt(k) == ' '; k = buf.length() - 1) {
    buf.delete(buf.length() - 1, buf.length());
return buf.toString();

StringBuffer buffer = new StringBuffer();
char[] chars = s.toCharArray();
for (int i = chars.length; i > 0; i--) {
    char c = s.charAt(i - 1);
    if (c != ' ') {
        buffer.append(chars, 0, i);
        break;
return buffer.toString();

int len = s.length();
int st = 0;
char[] val = s.toCharArray();
while ((st < len) && (val[len - 1] <= ' ')) {
    len--;
return (len < s.length()) ? s.substring(st, len) : s;

if (s == null) {
    return null;
} else {
    char c[] = s.toCharArray();
    int i = s.length() - 1;
    while (i >= 0 && c[i] == ' ') {
        i--;
    return s.substring(0, i + 1);

int i = s.length() - 1;
while (i >= 0 && (s.charAt(i)) == character) {
    i--;
return s.substring(0, i + 1);

int i = s.length() - 1;
while (i >= 0 && s.charAt(i) == character) {
    i--;
return i(s, 0, i + 1);