Question

在JAVA中如何求两个数组的并集

Answer 1

public static void main(String[] args)
{
Integer[] m = { 1, 2, 3, 4, 5 };
Integer[] n = { 3, 4, 6 };

Integer[] b = getB(m, n); for (Integer i : b)
{
System.out.println(i);
}

}
private static Integer[] getB(Integer[] m, Integer[] n)
{ // 将数组转换为set集合
Set<Integer> set1 = new HashSet<Integer>(Arrays.asList(m));
Set<Integer> set2 = new HashSet<Integer>(Arrays.asList(n)); // 合并两个集合 set1.addAll(set2);

Integer[] arr = {}; return set1.toArray(arr);
}