定义一个ArrayList集合，存储一批书籍，书籍具有书名、作者、价格三个属性， 键盘录入一个书名时，显示该书籍的详细信息。

定义一个ArrayList集合，存储一批书籍，书籍具有书名、作者、价格三个属性，
键盘录入一个书名时，显示该书籍的详细信息。

import java.util.*;class Book{    String name;    String author;    double price;    public Book(String name){        this.name = name;    }    public Book(String name,String author,double price){        this.name = name ;        this.author = author;        this.price = price;    }    public boolean equals(Book b){        return this.name.equals(b.name);    }    public String toString(){        return "书名: "+this.name+" 作者: "+this.author+" 零售价: "+this.price;    }}class Demo6{    public static void main(String[] args){        String str = null;        ArrayList<Book> list = new ArrayList<Book>();        list.add(new Book("三国演义","罗贯中",53.5));        list.add(new Book("水浒传","施耐庵",54.5));        list.add(new Book("西游记","吴承恩",60));        list.add(new Book("红楼梦","曹雪芹、高鹗",85));        Scanner sc = new Scanner(System.in);        while(sc.hasNext()){            str=sc.next();            break;        }        Iterator it = list.iterator();        while(it.hasNext()){            Book b =(Book)it.next();            if(b.equals(new Book(str))){            System.out.println("成功查询到"+str+"的详细信息");            System.out.println(b);            break;            }else{                if(!it.hasNext()){                    System.out.println("没有找到你查询的书籍");                }            }        }           }}