Add BinarySearch.java

BinarySearch.java

@@ -0,0 +1,32 @@
+import java.util.*;
+class BinarySearch {
+    static int binarySearch(int arr[], int left, int right, int element) {
+        if (right >= left) {
+            int mid = left + (right - left) / 2;
+            if (arr[mid] == element)
+                return mid;
+
+            if (arr[mid] > element)
+                return binarySearch(arr, left, mid - 1, element);
+
+            return binarySearch(arr, mid + 1, right, element);
+        }
+        return -1;
+    }
+
+    public static void main(String args[]) {
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();       // defines the length of array
+        int arr[] = new int[n];
+        for (int i = 0; i <n; i++) {
+            arr[i] = sc.nextInt();  // user input
+        }
+        int element = sc.nextInt(); // element to find its index in the given array
+        int result = binarySearch(arr, 0, n - 1, element);
+        if (result == -1)
+            System.out.println("Element not present in the given array");
+        else
+            System.out.println("Element found at index " + result);
+    }
+}
+