interrogation.java

Java与模式 源代码

package com.javapatterns.iterator.copsandsales;

public class Interrogation
{
    private static ShoppingCart copA;
    private static ShoppingCart copB;

    private static Iterator it;

    public static void main(String[] args)
    {

        copA = new CartOfCopA();
        copA.append(new String("No. 1: Dish Washer"));
        copA.append(new String("No. 2: Hair Dresser"));
        copA.append(new String("No. 3: Microwave"));

        copB = new CartOfCopB();
        copB.append(new String("No. 1: Hair Dresser"));
        copB.append(new String("No. 2: Diskman"));
        copB.append(new String("No. 3: Digital Camera"));
        copB.append(new String("No. 4: PC"));
        copB.append(new String("No. 5: Dish Washer"));

        System.out.println("Creating forward iterator:");
        //correction
        it = copA.createIterator();

        it.first();
        while (!it.isDone())
        {
            String item = (String)it.currentItem();
            it.next();
            System.out.println("Item: " + item);
        }

        System.out.println("Creating backward iterator:");
        it = copB.createIterator();

        it.first();
        while (!it.isDone())
        {
            String item = (String)it.currentItem();
            it.next();
            System.out.println("Item : " + item);
        }
    }
}