Java Utililty Methods String Char Count

List of utility methods to do String Char Count

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Description

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

Method

intcountChars(String s, String charset)
count Chars 
int nc = 0;
for (int i = 0; i < s.length(); i++) {
    char c = s.charAt(i);
    if (charset.indexOf(c) >= 0)
        nc++;
return nc;
intcountChars(String string, char c)
Count the number of occurrences of the character in the string. 
int result = 0;
int ppos = string.indexOf(c);
while (ppos >= 0) {
    ++result;
    ppos = string.indexOf(c, ppos + 1);
return result;
intcountChars(String string, int character)
Count number of times specified character appears in string. 
int count = 0;
int currIndex = 0;
while (true) {
    currIndex = string.indexOf(character, currIndex);
    if (currIndex == -1)
        break;
    ++currIndex; 
    ++count;
...
intcountChars(String text, char ch, int from, int to)
Counts number of specified characters in give text. 
int textLen = text.length();
if (from < 0) {
    from = 0;
if (to >= textLen) {
    to = textLen - 1;
int count = 0;
...
intcountCharsInString(final String stringToCountOccurrancesIn, final char characterToCount)
Count occurrances of a character in a string 
if (stringToCountOccurrancesIn == null) {
    throw new IllegalArgumentException("null s");
final char[] chars = stringToCountOccurrancesIn.toCharArray();
int count = 0;
for (char c : chars) {
    if (c == characterToCount) {
        count++;
...