Java Utililty Methods Collection Add

List of utility methods to do Collection Add

  1. HOME
  2. Java
  3. C
  4. Collection Add

Description

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

Method

TaddAll(T coll, Collection other)
add All 
coll.addAll(other);
return coll;
voidaddAll(T[] lhs, Collection rhs)
Add all elements from an array into a given collection of the same type. 
for (int i = 0; i != lhs.length; ++i) {
    rhs.add(lhs[i]);
voidaddAllFirst(Collection col, Deque deque)
add All First 
for (T item : col) {
    deque.addFirst(item);
booleanaddAllIfNotNull(final Collection collection, final Collection c)
add All If Not Null 
return (collection != null) && (c != null) && collection.addAll(c);
voidaddAllIfNotNull(final Collection collection, final Collection values)
add All If Not Null 
if (collection != null && values != null) {
    collection.addAll(values);
booleanaddAllIfSet(Collection target, Collection c)
Adds all of the elements in the specified collection to the target collection if a collection is specified. 
if (c == null)
    return false;
return target.addAll(c);
booleanaddAllIgnoreNull(Collection c, T... elements)
Null elements are not taking into account. 
boolean result = false;
for (T element : elements) {
    if (element != null) {
        result |= c.add(element);
return result;
booleanaddAllIgnoreNull(final Collection target, final Collection source)
Add elements from a source collection to a target collection unless they or the source collection itself are null. 
if (target == null)
    throw new NullPointerException("The target collection must not be null");
if (source == null)
    return false;
boolean changed = false;
for (T element : source)
    changed |= addIgnoreNull(target, element);
return changed;
...
voidaddAllNotNull(final Collection c, final E... elements)
adds all not null elements to the specified collection 
if (elements == null) {
    return;
for (final E e : elements) {
    addIfNotNull(e, c);
CollectionaddAllOrSame(Collection collection, Collection newElements)
Adds to a collection all given new elements in a second collection, returning the second collection same instance if the first is null or empty. 
Collection<T> result;
if (collection == null || collection.isEmpty()) {
    result = newElements;
} else {
    collection.addAll(newElements);
    result = collection;
return result;
...