diff --git a/java/853. Car Fleet.java b/java/853. Car Fleet.java
new file mode 100644
index 000000000..f1e0d2c15
--- /dev/null
+++ b/java/853. Car Fleet.java	
@@ -0,0 +1,32 @@
+class Solution {
+    public int carFleet(int target, int[] position, int[] speed) {
+        double[][] mergedPoints = new double[position.length][2];
+        for (int idx=0;idx<position.length;idx++){
+            mergedPoints[idx][0] = position[idx];
+            mergedPoints[idx][1] = speed[idx];            
+        }
+        Arrays.sort(mergedPoints, Comparator.comparingDouble(o -> -o[0]));
+        Stack<Double> backup = new Stack();
+        for (int idx=0;idx<position.length;idx++){
+            
+            double _position = mergedPoints[idx][0];
+            double _speed = mergedPoints[idx][1];
+            
+            //System.out.println("_position : " + _position);
+            
+            double _timeTaken = (target-_position)/_speed;
+            double _lastValue = 0;
+            if (!backup.isEmpty()){
+                _lastValue = backup.peek();
+            }
+            backup.push(_timeTaken);
+            //System.out.println(_timeTaken +"<="+ _lastValue +" is true :" + (_timeTaken <= _lastValue));
+            if (backup.size()>1 && 
+                _timeTaken <= _lastValue){
+                backup.pop();
+            }
+        }
+        return backup.size();
+        
+    }
+}
diff --git a/javascript/217-Contains-Duplicate.js b/javascript/217-Contains-Duplicate.js
deleted file mode 100644
index 3c96a1b20..000000000
--- a/javascript/217-Contains-Duplicate.js
+++ /dev/null
@@ -1,16 +0,0 @@
-/**
- * @param {number[]} nums
- * @return {boolean}
- */
-var containsDuplicate = function(nums) {
-    let map = {};
-    
-    for (let i = 0; i < nums.length; i++) {
-        if (nums[i] in map) {
-            return true;
-        } else {
-            map[nums[i]] = i;
-        }
-    }
-    return false;
-};