Java Utililty Methods ArrayList Create

List of utility methods to do ArrayList Create

Description

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

if (ArrayList.class.isInstance(list)) {
 return (ArrayList<E>) list;
} else {
 return new ArrayList<E>(list);

List asArrayList(Collection collection)
If input collection is ArrayList then return it.

if (collection instanceof ArrayList) {
 return (List<T>) collection;
return new ArrayList<T>(collection);

ArrayList createArrayList()
create Array List

return new ArrayList<E>();

ArrayList createArrayList()
create Array List

return new ArrayList<T>();

return new ArrayList<T>(arg);

ArrayList createArrayList(E... array)
create Array List

ArrayList<E> newCollection = new ArrayList<E>();
if (array != null) {
 Collections.addAll(newCollection, array);
return newCollection;

ArrayList createArrayList(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;

ArrayList<T> al = new ArrayList<>(size);
for (T item : items) {
 al.add(item);
return al;

ArrayList createArrayList(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;

ArrayList createArrayList(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;