diff --git a/lessons/binarysearch.java b/lessons/binarysearch.java
new file mode 100644
index 00000000..e9d44dee
--- /dev/null
+++ b/lessons/binarysearch.java
@@ -0,0 +1,27 @@
+// CODE:
+
+class Solution {
+    public int search(int[] nums, int target) {
+        
+int start = 0;
+        int end = nums.length - 1;
+        while(start <= end) {
+            int mid = start + (end - start)/2;
+            if(nums[mid] == target) {
+                return mid;
+            }
+            else if(target < nums[mid]) {
+                end = mid - 1;
+            }
+            else {
+                start = mid + 1;
+            }
+        }
+        return -1;
+    }
+}
+
+
+// Input: nums = [-1,0,3,5,9,12], target = 9
+// Output: 4
+// Explanation: 9 exists in nums and its index is 4
diff --git a/lessons/binarysearch.md b/lessons/binarysearch.md
deleted file mode 100644
index 081486ed..00000000
--- a/lessons/binarysearch.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-path: "/binarysearch"
-title: "Binary Search"
-order: "5B"
-section: "Searching & Sorting"
-description: "learn Searching algorithms"
----