Java Utililty Methods List Count

List of utility methods to do List Count

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Description

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

Method

intcount(List l, int from, int to, Object what)
count the number of occurences in a list 
int result = 0;
while (from < to) {
    Object which = l.get(from++);
    if (equals(which, what))
        result++;
return result;
Integercount(List values)
Derives the number of values for the given list of values. 
if (values == null || values.size() == 0) {
    return 0;
return values.size();
Mapcount(List lines)
count 
Map<String, Integer> result = new HashMap<String, Integer>();
for (String line : lines) {
    if (line.toLowerCase().contains(DEBUG_KEY)) {
        Integer currentCount = (result.get(DEBUG_KEY) == null ? 0 : result.get(DEBUG_KEY));
        result.put(DEBUG_KEY, currentCount + 1);
    } else if (line.toLowerCase().contains(INFO_KEY)) {
        Integer currentCount = (result.get(INFO_KEY) == null ? 0 : result.get(INFO_KEY));
        result.put(INFO_KEY, currentCount + 1);
...
intcountAtLevel(List aList, int aLevel)
Returns the number of objects at a given level in the given list hierarchy. 
if (aLevel < 0)
    return 1;
if (aLevel > 0) {
    int count = 0;
    for (int i = 0, iMax = aList.size(); i < iMax; i++)
        count += countAtLevel((List) aList.get(i), aLevel - 1);
    return count;
return aList.size();
intcountNumber(List list, int number)
count Number 
int occurrences = Collections.frequency(list, number);
return occurrences;
intcountOccurances(List encodings, int value)
count Occurances 
int count = 0;
for (int[] next : encodings) {
    if (contains(next, value)) {
        count++;
return count;
intcountOccurence(List valueList, int value)
count Occurence 
int count = 0;
Iterator<Integer> iterValueList = valueList.iterator();
while (iterValueList.hasNext()) {
    int vaInList = iterValueList.next();
    if (vaInList == value) {
        count++;
return count;
intcountOccurrencesOf(Object comparisonObject, List list)
Return an integer representing the number of occurrences (using equals()) of the specified object in the specified list. 
int instances = 0;
boolean comparisonObjectIsNull = comparisonObject == null;
if (list != null) {
    for (int i = 0; i < list.size(); i++) {
        Object listObject = list.get(i);
        if ((comparisonObjectIsNull & listObject == null)
                || (!comparisonObjectIsNull && comparisonObject.equals(listObject))) {
            instances++;
...