改正代码中的错误package ke; public class Books1 { //成员变量 int id; String name; //图书名称 double price; //图书单价 int number; //图书数量 double money; //总价 String publish; //出版社 //构造方法 public Books1(int id, String name, double price, int number, double money, String publish) { super(); this.id = id; this.name = name; this.price = price; this.number = number; this.money = money; this.publish = publish; } @Override public String toString() { String message = "图书编号：" + id + " 图书名称：" + name + " 出版社：" + publish + " 单价：" + price + " 库存数量：" + number; return message; } public void setNumber(int number) { this.number = number; } }

代码中的错误是缺少了包的声明语句，应该在代码开头添加以下语句：

package ke;

添加后的完整代码如下：

package ke;

public class Books1 { 
    //成员变量 
    int id; 
    String name; //图书名称 
    double price; //图书单价 
    int number; //图书数量 
    double money; //总价 
    String publish; //出版社 

    //构造方法 
    public Books1(int id, String name, double price, int number, double money, String publish) { 
        super(); 
        this.id = id; 
        this.name = name; 
        this.price = price; 
        this.number = number; 
        this.money = money; 
        this.publish = publish; 
    } 

    @Override 
    public String toString() { 
        String message = "图书编号：" + id + "  图书名称：" + name + "  出版社：" + publish + "  单价：" + price + "  库存数量：" + number; 
        return message; 
    } 

    public void setNumber(int number) { 
        this.number = number; 
    } 
}