package library; import java.util.ArrayList; import java.util.List; public class Bag { private List liBag; public Bag() { this.liBag = new ArrayList(); } public void add(Book bk) { this.liBag.add(bk); } public boolean del(String inIsbn) { boolean flag = false; Book tempBk; for (int i = 0; i < this.liBag.size(); i++) { tempBk = this.liBag.get(i); if (tempBk.getStrIsbn().equals(inIsbn)) { this.liBag.remove(i); flag = true; break; } } return flag; } public List getLiBag() { return liBag; } public void setLiBag(List liBag) { this.liBag = liBag; } }