Java Utililty Methods List Copy

List of utility methods to do List Copy

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Description

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

Method

ListcopyFirst(List list, int count)
Copies count items off of list, starting from the beginning. 
List<T> ret = new ArrayList<T>(list.size() < count ? list.size() : count);
int i = 0;
for (T elem : list) {
    ret.add(elem);
    if (i++ > count) {
        break;
return ret;
ListcopyIntArray(List li)
copy Int Array 
List<int[]> liC = new ArrayList<int[]>(li.size());
for (int[] a : li) {
    int[] c = new int[a.length];
    System.arraycopy(a, 0, c, 0, a.length);
    liC.add(c);
return liC;
voidcopyInto(List source, List dest)
copy Into 
dest.clear();
for (T obj : source)
    dest.add(obj);
ListcopyList(Collection c)
copy List 
if (c == null || c.size() == 0) {
    return new ArrayList<T>(0);
} else {
    return new ArrayList<T>(c);
ListcopyList(Collection list)
copy List 
List<T> result = new ArrayList<>();
for (T el : list)
    result.add(el);
return result;
voidcopyList(final List source, final List destination)
Copy the contents of the source list to the destination list Any items in the destination list before the copy will be removed 
if (source != null && destination != null) {
    destination.clear();
    for (Object obj : source) {
        destination.add(obj);
ListcopyList(final List list)
Return a simple "copy" of the list of objects without cloning each object instance 
if (list != null) {
    final List<K> newList = new ArrayList<K>(list.size());
    for (K o : list) {
        newList.add(o);
    return newList;
return null;
...
ListcopyList(List objects)
Copies a List into a new List. 
if (objects == null) {
    return null;
List newList = new ArrayList(objects.size());
for (Object o : objects) {
    newList.add(o);
return newList;
...
voidcopyList(List source, List destination)
copy List 
destination.clear();
for (Object o : source) {
    destination.add(o);
ListcopyList(List src)
Copy specified list to a new list 
List lstResult = new ArrayList();
if (src != null) {
    for (Iterator it = src.iterator(); it.hasNext();) {
        lstResult.add(it.next());
return lstResult;