itemcomparer.java

库存管理系统 采用JAVA来编写 希望对学习JAVA 的同学有所帮助

package merchant;

public class ItemComparer implements Comparable{
	public int compare(Object obj1,Object obj2)
	{
		if((obj1 instanceof Item)&&(obj2 instanceof Item))
		{
			Item item1=(Item)obj1;
			Item item2=(Item)obj2;
			return item1.id.compareTo(item2.id);
		}
		else
			return -1;
	}

}