feat: add maximum element in array implementation

Author: AbhiramSakha

src/main/java/com/thealgorithms/MaximumElement.java

@@ -0,0 +1,20 @@
+package com.thealgorithms.arrays;
+
+public class MaximumElement {
+    public static int findMax(int[] arr) {
+        int max = Integer.MIN_VALUE;
+
+        for (int num : arr) {
+            if (num > max) {
+                max = num;
+            }
+        }
+
+        return max;
+    }
+
+    public static void main(String[] args) {
+        int[] arr = {1, 5, 3, 9, 2};
+        System.out.println("Maximum element: " + findMax(arr));
+    }
+}