Java Utililty Methods Collection Element Get

List of utility methods to do Collection Element Get

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Description

The list of methods to do Collection Element Get are organized into topic(s).

Method

StringgetCommonSuffix(Collection c)
get Common Suffix 
if (c.size() == 0) {
    return "";
Iterator<String> iterator = c.iterator();
String commonSuffix = iterator.next();
while (iterator.hasNext()) {
    commonSuffix = getCommonSuffix(commonSuffix, iterator.next());
return commonSuffix;
StringgetComponentName(Collection existingNames, String name)
Create a unique name for an unnamed component 
if (existingNames.contains(name)) {
    int n = 2;
    while (existingNames.contains(name + " (" + n + ")")) {
        n++;
    return name + " (" + n + ")";
} else {
    return name;
...
StringgetDocIdString(Collection docIds)
Decodes the encoded document IDs and returns the comma-separated String of quoted document IDs. 
StringBuilder docIdString = new StringBuilder("");
for (String docId : docIds) {
    docIdString.append("'" + docId + "'" + ",");
return docIdString.substring(0, docIdString.length() - 1);
TgetElement(final int index, final Collection coll)
makes sense only if iteration order deterministic! 
return getElement(false, index, coll);
ClassgetElementClass(Collection collection)
get Element Class 
final E nonNull = firstNonNull(collection);
return nonNull == null ? null : (Class<E>) nonNull.getClass();
TgetElementFromSize1(Collection collection)
get Element From Size 
isNotSize1Exception(collection);
return getSingleElement(collection);
doublegetEntropy(Collection values)
get Entropy 
if (values.isEmpty()) {
    return -1.0;
double noOfTerms = 0;
for (Double frequency : values) {
    noOfTerms += frequency;
double entropy = 0.0;
...
ListgetEnumNames(Collection values)
Extracts the names of the given enum elements and returns them as string. 
final List<String> result = new ArrayList<String>(values.size());
for (final Enum value : values) {
    result.add(value.name());
return result;
StringgetFlatString(Collection elements)
get Flat String 
return getFlatString(",", false, elements.toArray());
ObjectgetGivenClassObject(Collection coll, Class clazz)
Get the given class type object from the collection. 
for (Iterator iterator = coll.iterator(); iterator.hasNext();) {
    Object object = (Object) iterator.next();
    if (object != null && clazz.isAssignableFrom(object.getClass())) {
        return object;
return null;