在Java中进行数组匹配的高效代码

import java.util.Arrays;

public class ArrayMatching {
    public static void main(String[] args) {
        int[] arr1 = {1, 2, 3, 4, 5};
        int[] arr2 = {3, 4, 5, 6, 7};

        int[] result = Arrays.stream(arr1).filter(Arrays.stream(arr2)::contains).toArray();

        System.out.println(Arrays.toString(result));
    }
}

import java.util.HashMap;
import java.util.Map;

public class ArrayMatching {
    public static void main(String[] args) {
        int[] arr1 = {1, 2, 3, 4, 5};
        int[] arr2 = {3, 4, 5, 6, 7};

        Map<Integer, Boolean> map = new HashMap<>();
        for (int num : arr2) {
            map.put(num, true);
        }

        int[] result = Arrays.stream(arr1).filter(num -> map.containsKey(num)).toArray();

        System.out.println(Arrays.toString(result));
    }
}