Help with Java Inventory Program - I almost got it

Question

Hello, I'm new to the forum so please don't hang me if I'm not posting this correctly or in the right place. I'm writing a Java Inventory Program for class and everything was great until we had to modify it to sort by product name (in my case dvd's). The problem is my arrays for inventory count and price are thrown off when I sort by dvd name because they are predefined. I could cheat and just rearrange the array in a logical order according to the dvd title but that isn't really the answer for me. Can someone help me do where my inventory count and price don't go out of wack when I sort by dvd name, I really don't want to start over.
Here is my code:
// Java InventoryProgram2
// Purpose of application is to Display DVD Inventory
import java.util.Arrays;
public class InventoryProgram2 // declare public class
{ // Start of public class InventoryProgram1
     String dvdName[] = { "The Departed", "The Dark Knight","The Mummy", "Minority Report"};
     double itemNum;
     float stockCount[] = {3, 5, 8,2};
     float totalValue [] = new float [4];
     float price[] = { 19, 22, 17, 14};
     float totInvVal;
          // Method for printing dvdName the dvdName
          public void DvdName ()
          { // Start of print method
               // For loop to calculate total value
               Arrays.sort(dvdName);
               for( int itemNum = 0; itemNum < dvdName.length; itemNum ++ )
                    totalValue[itemNum] = stockCount[itemNum] * price[itemNum];
               System.out.printf( "%s %15s %12s %12s %12s\n", "Item Number", "Dvd Name", "Price", "Stock", "Total"); // Prints title of column
               for ( int itemNum = 0; itemNum <dvdName.length; itemNum ++ )
                    System.out.printf("%-8d %20s %10.02f %12.02f %12.02f\n", itemNum, dvdName[itemNum], price [itemNum],stockCount[itemNum], totalValue[itemNum]); // Calls the value of each column
     } // end of method to print dvdName
     // Method for total value of the inventory
     public void totalInvValue()
     { //start of method to calc total inv value
     totInvVal = stockCount [0] * price [0] + stockCount [1] * price [1] + stockCount [2] * price [2] + stockCount [3] * price [3];
     System.out.printf("%s", "The Total Value of the Inventory is:","%10.02f");
     System.out.printf("$%.02f", totInvVal);
     } // end of method to calc total inv value
} // End of public class InventoryProgram1
// Java InventoryProgram2_Test
// Purpose of application is to Display DVD Inventory
public class InventoryProgram2_Test
{ // Start Bracket for InventoryProgram1
public static void main ( String args[] )
{ // Start Bracket for Public Main
     InventoryProgram2 myInventoryProgram2 = new InventoryProgram2(); // invokes InventoryProgram1
myInventoryProgram2.DvdName (); // calls DvdName Method
     myInventoryProgram2.totalInvValue(); // call method total inventory value
} // End Bracket for Public Main
} // End Bracket for InventoryProgram1
Edited by: ozzie2132 on Aug 11, 2008 6:57 PM
Edited by: ozzie2132 on Aug 11, 2008 6:57 PM

Answer 1

a_turingmachine wrote:
naive ex:
class DVD {
String dvdName;
float stockCount;
float price;
}--turing machine:
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