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_350.java
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package com.fishercoder.solutions;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Arrays;
public class _350 {
public static class Solution1 {
public int[] intersect(int[] nums1, int[] nums2) {
Map<Integer, Integer> map = new HashMap();
for (int i : nums1) {
map.put(i, map.getOrDefault(i, 0) + 1);
}
List<Integer> list = new ArrayList();
for (int i : nums2) {
if (map.containsKey(i) && map.get(i) > 0) {
list.add(i);
map.put(i, map.get(i) - 1);
}
}
return list.stream().mapToInt(i -> i).toArray();
}
}
public static class Solution2 {
public int[] intersect(int[] nums1, int[] nums2) {
Arrays.sort(nums1);
Arrays.sort(nums2);
int i = 0;
int j = 0;
List<Integer> list = new ArrayList<>();
while (i < nums1.length && j < nums2.length) {
if (nums1[i] == nums2[j]) {
list.add(nums1[i]);
i++;
j++;
} else if (nums1[i] < nums2[j]) {
i++;
} else {
j++;
}
}
return list.stream().mapToInt(k -> k).toArray();
}
}
}