Java Set Union union(Set... sets)

Description

Returns the union of multiple sets.

License

Open Source License

Parameter

Parameter	Description
sets	Multiple sets which will be united.
T	Type of values.

Return

A set forming the union of the given sets.

Declaration

@SafeVarargs
public static <T> Set<T> union(Set<T>... sets) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.*;

public class Main {
    /**/* ww  w  .j  a v  a2  s  .  c  o  m*/
     * Returns the union of multiple sets.
     * <p>
     * The original sets are not altered.
     *
     * @param sets Multiple sets which will be united.
     * @param <T>  Type of values.
     * @return A set forming the union of the given sets.
     */
    @SafeVarargs
    public static <T> Set<T> union(Set<T>... sets) {
        if (sets == null)
            return new HashSet<>();
        Set<T> result = new HashSet<>();
        for (Set<T> s : sets) {
            if (s != null)
                result.addAll(s);
        }
        return result;
    }
}

Related

1. union(Set one, Set two)
2. union(Set a, Set b)
3. union(Set left, Set right)
4. union(Set setA, Set setB)
5. union(Set setA, Set setB)
6. union(String[] set1, String[] set2)