Java Utililty Methods List Distinct Value

return (sourceList != null && !sourceList.contains(entry)) ? sourceList.add(entry) : false;

for (String fromItem : fromItems) {
    if (!toItems.contains(fromItem)) {
        toItems.add(fromItem);

if (sourceList == null || isEmpty(entryList)) {
    return 0;
int sourceCount = sourceList.size();
for (V entry : entryList)
    if (!sourceList.contains(entry)) {
        sourceList.add(entry);
return sourceList.size() - sourceCount;

Collections.sort(distinctVals, Collections.reverseOrder());
long denom = distinctVals.get(0);
for (int i = 1; i < distinctVals.size(); i++) {
    denom = (long) (denom * Math.pow(distinctVals.get(i), 1.0 / (1 << i)));
return denom;

String distinctClause;
if (attributes == null || attributes.isEmpty()) {
    distinctClause = DISTINCT.concat(ROOT_OBJ_ALIAS);
} else {
    distinctClause = DISTINCT;
    for (Iterator<String> iterator = attributes.iterator(); iterator.hasNext();) {
        String attr = (String) iterator.next();
        distinctClause = distinctClause.concat(ROOT_OBJ_ALIAS + DOT + attr);
...

int m = 0;
List<String> strList = new ArrayList<String>();
for (int i = 0; i < list.size(); i++) {
    for (int j = 0; j < list.size(); j++) {
        if (list.get(i).trim().equals(list.get(j).trim())) {
            if (i != j) {
                m = j;
                list.remove(m);
...

return null;

List<T> distinctVector = new ArrayList<T>();
vector.stream().distinct().forEach(s -> distinctVector.add(s));
return distinctVector;

if (isEmpty(sourceList)) {
    return 0;
int sourceCount = sourceList.size();
int sourceListSize = sourceList.size();
for (int i = 0; i < sourceListSize; i++)
    for (int j = (i + 1); j < sourceListSize; j++) {
        if (sourceList.get(i).equals(sourceList.get(j))) {
...

ArrayList distincts = new ArrayList(list.length);
for (int i = 0; i < list.length; i++) {
    if (!distincts.contains(list[i])) {
        distincts.add(list[i]);
return toArray(distincts);