Create Intersection of Two Arrays II.java

Author: Lokesh598

Array/Hash Table/Intersection of Two Arrays II.java

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+
+public class Solution {
+    public int[] intersect(int[] nums1, int[] nums2) {
+        Map<Integer, Integer> map = new HashMap<>();
+        
+        for (int num : nums1) {
+            map.put(num, map.getOrDefault(num, 0) + 1);
+        }
+        
+        List<Integer> result = new ArrayList<>();
+        
+        for (int num : nums2) {
+            if (map.getOrDefault(num, 0) > 0) {
+                result.add(num);
+                map.put(num, map.get(num) - 1);
+            }
+        }
+        
+        int[] ans = new int[result.size()];
+        for (int i = 0; i < result.size(); i++) {
+            ans[i] = result.get(i);
+        }
+        
+        return ans;
+    }
+}