Array Index out of bounds

Hi, someone please help me trace out the problem because I tried everything still can't figure out where's the problem ...
: 7 Line 23

Code:

---

public class BookTest
{
        public static void main(String args[])

        {
              Book bookArray[] = new Book[10];
               
                String dataArray [][] = {{"Java","Davis","123","Wiley","London","25.50","Book"},
                                        {"Where's my car", "Aston Kutcher","777","ORiely","Dallas","5.95","Fiction","123","456"},
                                        {"Earthquakes","ChuckBerry","435","LABooks","LA","75.00","NonFiction"},
                                        {"C++","Jones","456","Random","NY","10.75","Book"},
                                        {"Doom","The Rock","918","Sans Publishing","LA","12.50","Fiction","1233","2323"},
                                        {"Universal Studios","Walt","987","Dell","Houston","29.90","NonFiction"}};
       
                for (int i=0; i<bookArray.length; i++)
                {
                       
                        bookArray[i]=new Fiction (dataArray[i][0],dataArray[i][1], Integer.parseInt(dataArray[i][2]), new Publisher(dataArray[i][3],dataArray[i][4]), Double.parseDouble(dataArray[i][5]),i, new Background(dataArray[i][7], dataArray[i][8]));
 
                             
                        if (dataArray[i][6].equals("Fiction"))
                       
                          bookArray[i]=new Fiction (dataArray[i][0],dataArray[i][1], Integer.parseInt(dataArray[i][2]), new Publisher(dataArray[i][3],dataArray[i][4]), Double.parseDouble(dataArray[i][5]),i, new Background(dataArray[i][7], dataArray[i][8]));
                       

                       
                        if (dataArray[i][6].equals("NonFiction"))
                       
                          bookArray[i]= new NonFiction(dataArray[i][0],dataArray[i][1], Integer.parseInt(dataArray[i][2]), new Publisher(dataArray[i][3],dataArray[i][4]), Double.parseDouble(dataArray[i][5]),"History");
                                               

                       


                }// end of FOR Loop


           
               
                for (int j=0; j<10;j++)
                    {
                  //  bookArray[j].calculateTotalCharge((j+2)*3,Double.parseDouble(dataArray[j][5]));
               

                        System.out.println();
                    System.out.println();
                    System.out.printf(bookArray[j].toString());

                    } //end of for with j 

                     
      } //end of main
} //end class BookTest

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Let's look at a plain Book entry in your data array:

Code:

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{"Java", "Davis", "123", "Wiley", "London", "25.50", "Book"}

---

You'll notice that if your data array entry is a plain Book, it only has 7 Strings in its array, meaning the array goes from [i][0] to [i][6] (this is because arrays start at 0 -- are "0" based). If you try to go beyond this with a plain Book, you will run out of data and this exception will be thrown. For instance, here:

Code:

---

      if (dataArray[i][6].equals("Book"))
        bookArray[i] = new Fiction(dataArray[i][0], dataArray[i][1],
          Integer.parseInt(dataArray[i][2]), new Publisher(dataArray[i][3],
          dataArray[i][4]), Double.parseDouble(dataArray[i][5]), i,

          // *** this last line will throw the exception ***
          new Background(dataArray[i][7], dataArray[i][8]));

---

This probably shouldn't be a new Fiction object here but instead should be a new Book object. Likely your Book constructor (which we never see) doesn't ask for a Background object. At least that's my guess.

well still doing same thing or may be i don't understand

Code:

---


public class BookTest
{
        public static void main(String args[])

        {
              Book bookArray[] = new Book[10];
               
                /*String dataArray [][] = {{"Java","Davis","123","Wiley","London","25.50","Book"},
                                        {"Where's my car", "Aston Kutcher","777","ORiely","Dallas","5.95","Fiction","123","456"},
                                        {"Earthquakes","ChuckBerry","435","LABooks","LA","75.00","NonFiction"},
                                        {"C++","Jones","456","Random","NY","10.75","Book"},
                                        {"Doom","The Rock","918","Sans Publishing","LA","12.50","Fiction","1233","2323"},
                                        {"Universal Studios","Walt","987","Dell","Houston","29.90","NonFiction"}};
 
 */

                String dataArray [][] = {{"Where's my car", "Aston Kutcher","777","ORiely","Dallas","5.95","Fiction","123","456"},
                                        {"Earthquakes","ChuckBerry","435","LABooks","LA","75.00","NonFiction"},
                                        {"Doom","The Rock","918","Sans Publishing","LA","12.50","Fiction","1233","2323"},
                                        {"Universal Studios","Walt","987","Dell","Houston","29.90","NonFiction"}};
               
 

              for (int i=0; i<bookArray.length; i++)
                {
                       
                        bookArray[i]=new Fiction (dataArray[i][0],dataArray[i][1], Integer.parseInt(dataArray[i][2]), new Publisher(dataArray[i][3],dataArray[i][4]), Double.parseDouble(dataArray[i][5]),i, new Background(dataArray[i][7], dataArray[i][8]));
 
                             
                        if (dataArray[i][6].equals("Fiction"))
                       
                          bookArray[i]=new Fiction (dataArray[i][0],dataArray[i][1], Integer.parseInt(dataArray[i][2]), new Publisher(dataArray[i][3],dataArray[i][4]), Double.parseDouble(dataArray[i][5]),i, new Background(dataArray[i][7], dataArray[i][8]));
                       

                       
                        if (dataArray[i][6].equals("NonFiction"))
                       
                          bookArray[i]= new NonFiction(dataArray[i][0],dataArray[i][1], Integer.parseInt(dataArray[i][2]), new Publisher(dataArray[i][3],dataArray[i][4]), Double.parseDouble(dataArray[i][5]),"History");
                                               

                       


                }// end of FOR Loop


           
               
                for (int j=0; j<10;j++)
                    {
                  //  bookArray[j].calculateTotalCharge((j+2)*3,Double.parseDouble(dataArray[j][5]));
               

                        System.out.println();
                    System.out.println();
                    System.out.printf(bookArray[j].toString());

                    } //end of for with j 

                     
      } //end of main
} //end class BookTest

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Print out your code onto paper and with a pencil walk through what your code will do each step of the way. You'll see that every book is assigned to into a Fiction object whether it's a Fiction book or not. Then you'll know how to fix this.

Best of luck.

Thank you so much i got it!

Great! Happy coding!