// trees.addAll(tree);就是这里,这里添加不了另一个集合的全部元素,求解,谢谢了
//查看图书的功能
public void cheekBook(MyCompartor cm){
TreeSet<Book> trees=new TreeSet<Book>(cm);
trees.addAll(tree);
if(trees.isEmpty()){
System.out.println("请添加图书!!!");
}
else{
System.out.println("查看图书");
System.out.println("|书名| |作者| |出版社| |价格| |书号| |出版日期|");
Iterator<Book> it=trees.iterator();
while(it.hasNext()){
System.out.println(it.next());
}
}
}
//添加图书
public boolean addBook(String bookName, String author, String press, String price, String bookID, String pubdate){
book=new Book();//为什么要这样做,这样才不会覆盖之前传的值,保证每次对象不一样
boolean bl2=false;
book.setBookName(bookName);
book.setAuthor(author);
book.setPress(press);
book.setPrice(price);
book.setBookID(bookID);
book.setPubdate(pubdate);
System.out.println("新书信息如下:"+book.toStrings());
System.out.println("是否保存该书? (Y)是 (N)否");
option=sc.next();
if("y".equalsIgnoreCase(option)){
System.out.println("正在添加....");
tree.add(book);//把图书的信息添加到tree集合中
bl2=true;
}
else{
System.out.println("已取消");
}
return bl2;
}