Java中的向量,如何在对象中返回多个向量

Question

我正在研究一个java程序,我在方法中定义并填充了几个向量(从文件中).我需要从方法中返回所有向量的内容.我听说你可以将它们全部放在一个物体中来归还它们.这有可能,如果是的话,怎么样？如果没有,你有什么可能的解决方案吗？在此先感谢您的帮助!

这是一段代码:

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

在个人情况下,我完全废弃了这种方法.您似乎需要Product类:

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
}

然后这样的事情:

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[]{});
  }

}