Java Utililty Methods ArrayList Union

List of utility methods to do ArrayList Union

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ArrayList Union

Description

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

Method

ArrayList union(ArrayList list1, ArrayList list2)
union

ArrayList<String> result = new ArrayList<String>();
result.addAll(list1);
result.addAll(list2);
Collections.sort(result);
return distinct(result);

ArrayList Union(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);

ArrayList union(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;
...

ArrayList unionSets(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;