Create Find missing in second array

Find missing in second array

@@ -0,0 +1,60 @@
+//Find missing in second array
+
+import java.io.*;
+import java.util.*;
+
+class Solution {
+    ArrayList<Integer> findMissing(int a[], int b[], int n, int m) {
+        ArrayList<Integer> ans = new ArrayList<>();
+        Map<Integer, Integer> map = new HashMap<>();
+
+        for(int elb : b) {
+            map.put(elb, 1);
+        }
+
+        for(int ela : a) {
+            if(!map.containsKey(ela)) {
+                ans.add(ela);
+            }
+        }
+
+        return ans;
+    }
+}
+
+class Array {
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int testcases = Integer.parseInt(br.readLine());
+
+        while(testcases-- > 0) {
+            String line = br.readLine();
+            String[] q = line.trim().split("\\s+");
+            int n =Integer.parseInt(q[0]);
+            int m =Integer.parseInt(q[1]);
+            String line1 = br.readLine();
+            String[] a1 = line1.trim().split("\\s+");
+            int a[] = new int[n];
+
+            for(int i = 0; i < n; i++) {
+                a[i] = Integer.parseInt(a1[i]);
+            }
+
+            String line2 = br.readLine();
+            String[] a2 = line2.trim().split("\\s+");
+            int b[] = new int[m];
+
+            for(int i = 0; i < m; i++) {
+                b[i] = Integer.parseInt(a2[i]);
+            }
+
+            Solution ob = new Solution();
+            ArrayList<Integer> ans=ob.findMissing(a,b,n,m);
+
+            for(int i = 0; i < ans.size(); i++) {
+                System.out.print(ans.get(i)+" ");
+            }
+            System.out.println();
+        }
+    }