Change project structure to a Maven Java project + Refactor (#2816)

src/main/java/com/thealgorithms/maths/PowerOfTwoOrNot.java

@@ -0,0 +1,27 @@
+package com.thealgorithms.maths;
+
+/**
+ * A utility to check if a given number is power of two or not. For example 8,16
+ * etc.
+ */
+public class PowerOfTwoOrNot {
+
+    public static void main(String[] args) {
+        assert !checkIfPowerOfTwoOrNot(0);
+        assert checkIfPowerOfTwoOrNot(1);
+        assert checkIfPowerOfTwoOrNot(8);
+        assert checkIfPowerOfTwoOrNot(16);
+        assert checkIfPowerOfTwoOrNot(1024);
+    }
+
+    /**
+     * Checks whether given number is power of two or not.
+     *
+     * @param number the number to check
+     * @return {@code true} if given number is power of two, otherwise
+     * {@code false}
+     */
+    public static boolean checkIfPowerOfTwoOrNot(int number) {
+        return number != 0 && ((number & (number - 1)) == 0);
+    }
+}