test using rand numbers

Maths/FindMax.java

@@ -1,18 +1,33 @@
 package Maths;
 
+import java.util.Arrays;
+import java.util.Random;
+
 public class FindMax {
 
-    //Driver
+    /**
+     * Driver Code
+     */
     public static void main(String[] args) {
-        int[] array = {2, 4, 9, 7, 19, 94, 5};
-        assert findMax(array) == 94;
+        Random random = new Random();
+
+        /* random size */
+        int size = random.nextInt(100) + 1;
+        int[] array = new int[size];
+
+        /* init array with random numbers */
+        for (int i = 0; i < size; i++) {
+            array[i] = random.nextInt() % 100;
+        }
+
+        assert Arrays.stream(array).max().getAsInt() == findMax(array);
     }
 
     /**
      * find max of array
      *
      * @param array the array contains element
-     * @return max value
+     * @return max value of given array
      */
     public static int findMax(int[] array) {
         int max = array[0];