Java Utililty Methods ArrayList Create

List of utility methods to do ArrayList Create

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Description

The list of methods to do ArrayList Create are organized into topic(s).

Method

ArrayListasArrayList(Collection list)
as Array List 
if (ArrayList.class.isInstance(list)) {
    return (ArrayList<E>) list;
} else {
    return new ArrayList<E>(list);
ListasArrayList(Collection collection)
If input collection is ArrayList then return it. 
if (collection instanceof ArrayList) {
    return (List<T>) collection;
return new ArrayList<T>(collection);
ArrayListcreateArrayList()
create Array List 
return new ArrayList<E>();
ArrayListcreateArrayList()
create Array List 
return new ArrayList<T>();
ListcreateArrayList(Collection arg)
create Array List 
return new ArrayList<T>(arg);
ArrayListcreateArrayList(E... array)
create Array List 
ArrayList<E> newCollection = new ArrayList<E>();
if (array != null) {
    Collections.addAll(newCollection, array);
return newCollection;
ArrayListcreateArrayList(final DataType first, final DataType second)
Creates a new ArrayList from the given pair of values. 
final ArrayList<DataType> result = new ArrayList<DataType>(2);
result.add(first);
result.add(second);
return result;
ArrayListcreateArrayList(Iterable items, int size)
create Array List 
ArrayList<T> al = new ArrayList<>(size);
for (T item : items) {
    al.add(item);
return al;
ArrayListcreateArrayList(Object[] a)
create Array List 
ArrayList al = new ArrayList(a.length);
for (int i = 0; i < a.length; i++)
    al.add(a[i]);
return al;
ArrayListcreateArrayList(String[] a)
create Array List 
ArrayList<String> b = new ArrayList<String>();
for (int i = 0; i < a.length; i++) {
    b.add(a[i]);
return b;