General way of making class : Book

class Book
{
 String title;
 String author;
 float  price;
 int    cat, subCat;

 public Book (String t, String a, int c1, int c2, float p)
 {
  title = t;
  author = a;
  price = p;
  cat = c1;
  subCat = c2;
 }

 public String details ()
 {
  return title+", "+author+" Category "+cat+"."+subCat+" value $"+price;
 }

 public String toString()
 {
  return "Title <"+title+"> Author <"+author+"> cat:"+cat+" subCat:"+subCat+" price:"+price;
 }
}