Create Contains_Duplicate

Signed-off-by: Devanshi Lawania <[email protected]>

Author: devanshi2121

Contains_Duplicate

@@ -0,0 +1,11 @@
+class Solution {
+    public boolean containsDuplicate(int[] nums) {
+        Arrays.sort(nums);
+        for(int i=0;i<nums.length-1;i++){
+            if(nums[i]==nums[i+1]){
+                return true;
+            }
+        }
+        return false;
+    }
+}