Question

I’m working on a java program, and I have several vectors defined and filled (from a file) inside a method. I need to return the contents of all the vectors from the method. I have heard you can put them all in one object to return them. Is that possible, and if so, how? If not, do you have any possible solutions for me? Thanks in advance for your help!

Here is a code snippet:

Object getInventory() {                Vector<String> itemID=new Vector<String>();         Vector<String> itemName=new Vector<String>();         Vector<Integer> pOrdered=new Vector<Integer>();         Vector<Integer> pInStore=new Vector<Integer>();         Vector<Integer> pSold=new Vector<Integer>();         Vector<Double> manufPrice=new Vector<Double>();         Vector<Double> sellingPrice=new Vector<Double>();           Object inventoryItem=new Object(); //object to store vectors in      try     {         Scanner infile= new Scanner(new FileReader('Ch10Ex16Data.txt'));          int i=0;          while (infile.hasNext())         {                             itemID.addElement(infile.next());                             itemName.addElement(infile.next()+infile.nextLine());             pOrdered.addElement(infile.nextInt());             pInStore.addElement(pOrdered.elementAt(i));             pSold.addElement(0);             manufPrice.addElement(infile.nextDouble());             sellingPrice.addElement(infile.nextDouble());             i++;          }         infile.close();          System.out.println(itemID);         System.out.println(itemName);         System.out.println(pOrdered);         System.out.println(pInStore);           System.out.println(pSold);         System.out.println(manufPrice);         System.out.println(sellingPrice);      }     catch (Exception f)     {        System.out.print(f);     }       return inventoryItem; } 

Answer 1

Personnally, I’d scrap that approach completely. It seems like you need a Product class:

public class Product {      private String itemName;     private int itemID;     // etc etc      public Product(String itemName, int itemID) {        this.itemName = itemName;        this.itemID = itemID;        // etc etc      }      public String getItemName() {        return itemName;     }       public int getItemID() {       return itemID;     }       // etc etc } 

Then something like this :

public class Invertory {   private List<Product> products = new ArrayList<Product>  // etc etc  public Inventory(String fileName) throws IOException {       // Load file,        // Read each product,         products.add(new Product(...product arguments); //add to array   }    public Product[] getProducts() {       return products.toArray(new Product[]{});   } 

}