shoppingcart.java

来自「Begining JSP Web Development外文书籍源代码」· Java 代码 · 共 33 行

package com.wrox.begjsp.model2;

import java.util.ArrayList;
import java.util.Iterator;

public class ShoppingCart {

  private ArrayList items = new ArrayList();

  public void addItem(Book b) {
    boolean foundBook = false;
    if (items.size() == 0) {
      items.add(b);
    } else {
      for(int i=0;i<items.size();i++) {
        Book book = (Book)items.get(i);
        if (book.getISBN().equals(b.getISBN())) {
          book.setQuantity(book.getQuantity()+1);
          foundBook = true;
          break;
        }
      }
      if (!foundBook) {
        items.add(b);
      }
    }
  }
  public Iterator getContents() {
    System.out.println(items.size());
    return items.iterator();
  }
}