Java Utililty Methods ArrayList Union

List of utility methods to do ArrayList Union

  1. HOME
  2. Java
  3. A
  4. ArrayList Union

Description

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

Method

ArrayListunion(ArrayList list1, ArrayList list2)
union 
ArrayList<String> result = new ArrayList<String>();
result.addAll(list1);
result.addAll(list2);
Collections.sort(result);
return distinct(result);
ArrayListUnion(ArrayList list1, ArrayList list2)
Finds the union of two lists of String objects 
Set union = new HashSet(list1);
union.addAll(new HashSet(list2));
return new ArrayList(union);
ArrayListunion(ArrayList a, ArrayList b)
union 
ArrayList<T> result = new ArrayList<T>();
for (T t : a)
    if (!result.contains(t))
        result.add(t);
for (T t : b)
    if (!result.contains(t))
        result.add(t);
return result;
...
ArrayListunionSets(ArrayList s1, ArrayList s2)
union two sets s1 and s2 
if (s2 == null) {
    return s1;
for (Integer i : s2) {
    if (!s1.contains(i)) {
        s1.add(i);
return s1;