catalog.java

icarnegie卡耐基中ssd4练习exercise4答案 绝对正确

import java.util.*;

public class Catalog implements Iterable<Product> {
	private ArrayList<Product> products;
	
	public Catalog (){
		this.products = new ArrayList<Product>();
	}

	public void addProduct(Product product){
		this.products.add(product);
	}
	
	public Iterator<Product> iterator() {
		return this.products.iterator();
	}
	
	public Product getProduct(String code) {
		for(Product product : this.products){
			if(product.getCode().equals(code)){
				return product;
			}
		}
		return null;
	}
	
	public int getNumberOfProducts(){
        return this.products.size();
		}
	
}