diff --git a/#442/Solution.java b/#442/Solution.java
new file mode 100644
index 0000000..c652980
--- /dev/null
+++ b/#442/Solution.java
@@ -0,0 +1,14 @@
+class Solution {
+    public List<Integer> findDuplicates(int[] nums) {
+        List<Integer> l = new ArrayList<>();
+        HashSet<Integer> h = new HashSet<>();
+        for(int i=0;i<nums.length;i++){
+            if(h.contains(nums[i]))
+                l.add(nums[i]);
+            else
+                h.add(nums[i]);
+        }
+        return l;
+    }
+    
+}
\ No newline at end of file