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

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

@@ -0,0 +1,28 @@
+package com.thealgorithms.maths;
+
+/**
+ * https://en.wikipedia.org/wiki/Cube_(algebra)
+ */
+public class PerfectCube {
+
+    public static void main(String[] args) {
+        assert !isPerfectCube(-1);
+        assert isPerfectCube(0);
+        assert isPerfectCube(1);
+        assert !isPerfectCube(4);
+        assert isPerfectCube(8);
+        assert isPerfectCube(27);
+    }
+
+    /**
+     * Check if a number is perfect cube or not
+     *
+     * @param number number to check
+     * @return {@code true} if {@code number} is perfect cube, otherwise
+     * {@code false}
+     */
+    public static boolean isPerfectCube(int number) {
+        int a = (int) Math.pow(number, 1.0 / 3);
+        return a * a * a == number;
+    }
+}