Update and rename Perfect BinarySearch to PerfectBinarySearch.java

Author: StepfenShawn

Searches/Perfect BinarySearch

@@ -0,0 +1,34 @@
+ import java.util.*;
+
+class PerfectBinarySearch{
+
+    static int binarySearch(int[] arr, int target) 
+    {
+        int low = 0 ;
+        int high = arr.length - 1 ;
+
+        while(low <= high) {
+            int mid =(low + high) / 2;
+
+            if(arr[mid] == target) {
+                return mid;
+            }
+            else if(arr[mid] > target) {
+                high = mid - 1;
+            }
+            else {
+                low = mid + 1;
+            }
+
+        }
+        return -1;
+    }
+
+    public static void main(String[] args)
+    {
+        PerfectBinarySearch BinarySearch = new PerfectBinarySearch();
+        int[] array = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
+        assert BinarySearch.binarySearch(array, -1) == -1;
+        assert BinarySearch.binarySearch(array, 11) == -1;
+    }
+}