编写一个Book类

1 编写一个Book类，该类至少有name和price两个属性。该类要实现Comparable接口，在接口的compareTo（）方法中规定两个Book类实例的大小关系为二者的price属性的大小关系。在主函数中，选择合适的集合类型存放Book类的若干个对象，然后创建一个新的Book类的对象，并检查该对象与集合中的哪些对象相等。查询结果如下图：

package JAVA1;  
public class Book implements Comparable{   
    String name;  
    float price;  
    public Book(String name,float price){  
        this.name=name;  
        this.price=price;  
        }  
    public String getName() {    
        return name;    
    }    
    public void setName(String name) {    
        this.name = name;    
    }    
    public double getPrice() {    
        return price;    
    }    
    public void setPrice(float price) {    
        this.price = price;    
    }  
           public int compareTo(Book b) {  
                  if(b.price-this.price==0)  
                      return 0;  
                  if(b.price-this.price!=0)  
                      return 1;  
                return -1;  
           }  

}

package JAVA1;
import java.util.*;  
public class Test {  
    public static void main(String[] args) {    
           ArrayList list = new ArrayList();     
           Book book1=new Book("JAVA基础教程",28f);     
           Book book2=new Book("数据库技术",29f);     
           Book book3=new Book("C++基础教程",29f);   
           list.add(book1);     
           list.add(book2);     
           list.add(book3);  
           Iterator it = list.iterator();  
           Book book=new Book("《模式识别》",29f);  
           System.out.println("新书："+book.name+"与下列图书：");  
           while(it.hasNext())    
            {    
                Book b = it.next();    
                if(book.compareTo(b)==0)   
                    System.out.println(b.name);      
            }    
            System.out.println("价格相同，具体价格为："+book.price+"元");    
        }    
}