java求两个数组的并集

您好，以下是求两个数组的并集的 Java 代码：

import java.util.HashSet;

public class Main {
    public static void main(String[] args) {
        int[] arr1 = {1, 2, 3, 4, 5};
        int[] arr2 = {4, 5, 6, 7, 8};
        int[] union = getUnion(arr1, arr2);
        for (int i : union) {
            System.out.print(i + " ");
        }
    }

    public static int[] getUnion(int[] arr1, int[] arr2) {
        HashSet<Integer> set = new HashSet<>();
        for (int i : arr1) {
            set.add(i);
        }
        for (int i : arr2) {
            set.add(i);
        }
        int[] union = new int[set.size()];
        int index = 0;
        for (int i : set) {
            union[index++] = i;
        }
        return union;
    }
}

希望能对您有所帮助！