Merge pull request #1437 from shellhub/dev

Rename file

DIRECTORY.md

@@ -146,6 +146,7 @@
   * [PerfectNumber](https://github.com/TheAlgorithms/Java/blob/master/Maths/PerfectNumber.java)
   * [PerfectSquare](https://github.com/TheAlgorithms/Java/blob/master/Maths/PerfectSquare.java)
   * [Pow](https://github.com/TheAlgorithms/Java/blob/master/Maths/Pow.java)
+  * [PowerOfTwoOrNot](https://github.com/TheAlgorithms/Java/blob/master/Maths/PowerOfTwoOrNot.java)
   * [PowRecursion](https://github.com/TheAlgorithms/Java/blob/master/Maths/PowRecursion.java)
   * [PrimeCheck](https://github.com/TheAlgorithms/Java/blob/master/Maths/PrimeCheck.java)
   * [PrimeFactorization](https://github.com/TheAlgorithms/Java/blob/master/Maths/PrimeFactorization.java)
@@ -182,7 +183,6 @@
   * [LowestBasePalindrome](https://github.com/TheAlgorithms/Java/blob/master/Others/LowestBasePalindrome.java)
   * [PasswordGen](https://github.com/TheAlgorithms/Java/blob/master/Others/PasswordGen.java)
   * [PerlinNoise](https://github.com/TheAlgorithms/Java/blob/master/Others/PerlinNoise.java)
-  * [PowerOfTwoOrNot](https://github.com/TheAlgorithms/Java/blob/master/Others/PowerOfTwoOrNot.java)
   * [QueueUsingTwoStacks](https://github.com/TheAlgorithms/Java/blob/master/Others/QueueUsingTwoStacks.java)
   * [RabinKarp](https://github.com/TheAlgorithms/Java/blob/master/Others/RabinKarp.java)
   * [RemoveDuplicateFromString](https://github.com/TheAlgorithms/Java/blob/master/Others/RemoveDuplicateFromString.java)

Maths/PowerOfTwoOrNot.java

@@ -0,0 +1,28 @@
+package 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);
+    }
+}

Others/PowerOfTwoOrNot.java

@@ -1,36 +0,0 @@
-package Others;
-
-import java.util.Scanner;
-
-/**
- * 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) {
-
-        Scanner sc = new Scanner(System.in);
-        System.out.println("Enter the number");
-        int num = sc.nextInt();
-        boolean isPowerOfTwo = checkIfPowerOfTwoOrNot(num);
-        if (isPowerOfTwo) {
-            System.out.println("Number is a power of two");
-        } else {
-            System.out.println("Number is not a power of two");
-        }
-        sc.close();
-    }
-
-
-    /**
-     * Checks whether given number is power of two or not.
-     *
-     * @param number
-     * @return boolean
-     */
-    public static boolean checkIfPowerOfTwoOrNot(int number) {
-        return number != 0 && ((number & (number - 1)) == 0);
-    }
-}