Book.java:文件
 
 
public class Book {
    private int id;
    private String name;
    private String author;
    private double price;
 
    public int getId() {
        return id;
    }
 
    public void setId(int id) {
        this.id = id;
    }
 
    public String getName() {
        return name;
    }
 
    public String getAuthor() {
        return author;
    }
 
    public void setAuthor(String author) {
        this.author = author;
    }
 
    public double getPrice() {
        return price;
    }
 
    public void setPrice(double price) {
        this.price = price;
    }
 
    public Book(int id, String name, String author, double price) {
        this.id = id;
        this.name = name;
        this.author = author;
        this.price = price;
    }
 
    @Override
    public String toString() {
        return "Book{id="+id+"\tname="+name+"\tauthor="+author+"\tprice="+price+"}";
    }
}