Refactored all solutions

Java/Object Oriented Programming/Java Abstract Class/Solution.java

@@ -21,12 +21,12 @@ class MyBook extends Book {
     
 public class Main {
     public static void main(String []args) {
-        //Book new_novel=new Book(); This line prHMain.java:25: error: Book is abstract; cannot be instantiated
+        // Book new_novel=new Book(); This line prHMain.java:25: error: Book is abstract; cannot be instantiated
         Scanner sc = new Scanner(System.in);
         String title = sc.nextLine();
         MyBook new_novel = new MyBook();
         new_novel.setTitle(title);
-        System.out.println("The title is: "+ new_novel.getTitle());
+        System.out.println("The title is: " + new_novel.getTitle());
         sc.close();
     }
 }