Java Utililty Methods String Match Count

List of utility methods to do String Match Count

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Description

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

Method

intcountMatches(String str, String match)
Counts the occurence of a String in another String 
int counter = 0;
while (str.contains(match)) {
    counter++;
    str = str.substring(str.indexOf(match) + match.length());
return counter;
intcountMatches(String str, String sub)
count Matches 
if (!hasText(str) || !hasText(sub)) {
    return 0;
int count = 0;
int idx = 0;
while ((idx = str.indexOf(sub, idx)) != INDEX_NOT_FOUND) {
    count++;
    idx += sub.length();
...
intcountMatches(String str, String sub)
Returns the number of times sub occurs in str 
int count = 0;
int initpos = 0;
while (str.indexOf(sub, initpos) != -1) {
    count = count + 1;
    initpos = str.indexOf(sub, initpos) + 1;
return count;
intcountMatches(String str, String sub)

Counts how many times the substring appears in the larger String.

A null or empty ("") String input returns 0.

 StringUtils.countMatches(null, *)       = 0 StringUtils.countMatches("", *)         = 0 StringUtils.countMatches("abba", null)  = 0 StringUtils.countMatches("abba", "")    = 0 StringUtils.countMatches("abba", "a")   = 2 StringUtils.countMatches("abba", "ab")  = 1 StringUtils.countMatches("abba", "xxx") = 0 
if (isEmpty(str) || isEmpty(sub)) {
    return 0;
int count = 0;
int idx = 0;
while ((idx = str.indexOf(sub, idx)) != -1) {
    count++;
    idx += sub.length();
...
intcountMatches(String str, String sub)
count Matches 
if (str == null || str.length() == 0 || sub == null || sub.length() == 0) {
    return 0;
int count = 0;
int idx = 0;
while ((idx = str.indexOf(sub, idx)) != -1) {
    count++;
    idx += sub.length();
...
intcountMatches(String str, String sub)
count Matches 
if ((isEmpty(str)) || (isEmpty(sub))) {
    return 0;
int count = 0;
int idx = 0;
while ((idx = str.indexOf(sub, idx)) != -1) {
    count++;
    idx += sub.length();
...
intcountMatches(String str, String sub)
count Matches 
if (isEmpty(str) || isEmpty(sub)) {
    return 0;
int count = 0;
int idx = 0;
while ((idx = str.indexOf(sub, idx)) != -1) {
    count++;
    idx += sub.length();
...
intcountMatches(String str, String sub)

Counts how many times the substring appears in the larger String.

A null or empty ("") String input returns 0.

 StringUtils.countMatches(null, *)       = 0 StringUtils.countMatches("", *)         = 0 StringUtils.countMatches("abba", null)  = 0 StringUtils.countMatches("abba", "")    = 0 StringUtils.countMatches("abba", "a")   = 2 StringUtils.countMatches("abba", "ab")  = 1 StringUtils.countMatches("abba", "xxx") = 0 
if (isEmpty(str) || isEmpty(sub)) {
    return 0;
int count = 0;
int idx = 0;
while ((idx = str.indexOf(sub, idx)) != -1) {
    count++;
    idx += sub.length();
...
intcountMatches(String string, char find)
count Matches 
int count = 0;
for (int i = 0; i < string.length(); i++) {
    if (string.charAt(i) == find)
        count++;
return count;
intcountMatches(String string, char toMatch)
Count the number of times a specific character is present in a string 
int occurrences = 0;
for (char c : string.toCharArray()) {
    if (c == toMatch) {
        occurrences++;
return occurrences;