Java Utililty Methods Collection Concatenate

List of utility methods to do Collection Concatenate

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Description

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

Method

Listconcat(boolean removeDuplicates, Collection firstCollection, Collection... collections)
concat 
final List<E> result;
if (removeDuplicates) {
    result = new ArrayList<E>();
    addElements(removeDuplicates, result, firstCollection);
} else {
    result = new ArrayList<E>(firstCollection);
for (Collection<?> collection : collections) {
...
Stringconcat(Collection> classes, String separator)
concat 
StringBuilder builder = new StringBuilder();
for (Iterator<Class<?>> it = classes.iterator(); it.hasNext();) {
    builder.append(it.next().getCanonicalName());
    if (it.hasNext()) {
        builder.append(separator);
return builder.toString();
...
Stringconcat(Collection collection, String delimiter)
concat 
if (collection == null) {
    return null;
StringBuilder buf = new StringBuilder();
Iterator<E> itr = collection.iterator();
while (itr.hasNext()) {
    buf.append(itr.next().toString());
    if (itr.hasNext()) {
...
Stringconcat(Collection c)
concat 
StringBuilder sb = new StringBuilder();
for (String s : c) {
    if (sb.length() > 0) {
        sb.append(",");
    sb.append(s);
return sb.toString();
...
Stringconcat(Collection items)
Concatenate a collection of strings 
return (items != null) ? join(null, items.toArray(new String[items.size()])) : null;
Stringconcat(Collection parts, int start, String defaultText)
concat 
return concatArray(parts.toArray(new String[parts.size()]), start, defaultText);
Stringconcat(Collection pieces, String delim)
Build a string concatenating the pieces, adding the delim between each. 
return concat(pieces, delim, 0, pieces.size());
Collectionconcat(Collection a, Collection b)
concat 
Collection<T> result = new ArrayList<>(a.size() + b.size());
result.addAll(a);
result.addAll(b);
return Collections.unmodifiableCollection(result);
Stringconcat(Collection a, int offset, String sep, String start, String end)
concat 
StringBuilder sb = new StringBuilder();
sb.append(start);
Iterator<T> it;
for (it = a.iterator(); offset > 0 && it.hasNext(); --offset, it.next())
    ;
if (offset == 0 && it.hasNext()) {
    sb.append(it.next());
    while (it.hasNext()) {
...
Listconcat(Collection first, Collection second)
concat 
List<T> objs = new ArrayList<>();
objs.addAll(first);
objs.addAll(second);
return objs;