Java Utililty Methods Java String Format

if (classname == null) {
    return null;
final StringBuilder sb = new StringBuilder();
final CharacterIterator iter = new StringCharacterIterator(classname);
char c = iter.first();
if (c == CharacterIterator.DONE) {
    return null;
...

String normalized = normalize ? normalize(original) : original;
StringBuilder sb = new StringBuilder(normalized.length());
boolean nextUpper = false;
for (char c : normalized.toCharArray()) {
    if (sb.length() == 0) {
        if (Character.isJavaIdentifierStart(c)) {
            c = firstCharacterUpperCase ? Character.toUpperCase(c) : Character.toLowerCase(c);
            sb.append(c);
...

if (start1 == null || end1 == null)
    return input;
StringBuilder out = new StringBuilder(input.length());
String hex;
char ch;
if (start2 == null || end2 == null) {
    start2 = start1;
    end2 = end1;
...

if (str == null)
    return "null";
int len = str.length();
StringBuilder buf = new StringBuilder(len + 10);
buf.append("\"");
for (int i = 0; i < len; i++) {
    char c = str.charAt(i);
    switch (c) {
...

final StringBuilder builder = new StringBuilder(20 + doubles.length * 20);
toJava(doubles, builder);
return builder.toString();

String out = "";
boolean nextUpper = false;
for (int i = 0; i < name.length(); i++) {
    char next = name.charAt(i);
    if (next == '-') {
        nextUpper = true;
    } else {
        if (nextUpper) {
...

The following characters are replaced with corresponding character entities :

return text.replace("&lt;", "<").replace("&gt;", ">").replace("&quot;", "\"").replace("&apos;", "\'")
        .replace("&amp;", "&");

String output = "";
char[] charArray = unicode.toCharArray();
for (int i = 0; i < charArray.length; ++i) {
    char a = charArray[i];
    if ((int) a > 255) {
        output += "\\u" + Integer.toHexString((int) a);
    } else {
        output += a;
...

if (prop != null && prop.length() >= 2) {
    if (Character.isLowerCase(prop.charAt(0)) && Character.isUpperCase(prop.charAt(1))) {
        StringBuilder fixedProp = new StringBuilder(prop.substring(0, 1).toUpperCase());
        fixedProp.append(prop.substring(1));
        return fixedProp.toString();
return prop;
...

return goBool == 1;