小白在实训的学习实训的第二周开始写图书管理系统代码，接下来是记录学习的过程。
创建了一个Library 类和Booktest类
创建Library类对图书管理系统 创建方法，然后在写构造方法
package com.lenovo.www.entity;
public class Library {
private int Id;
private String BookName;
private String Author;
private String Reader;
private String price;
private String TypeId;
private String BookDesc;
public Library() {}
public Library(int id, String bookName, String author, String reader, String price, String typeId,
String bookDesc) {
super();
Id = id;
BookName = bookName;
Author = author;
Reader = reader;
this.price = price;
TypeId = typeId;
BookDesc = bookDesc;
}
public int getId() {
return Id;
}
public void setId(int id) {
Id = id;
}
public String getBookName() {
return BookName;
}
public void setBookName(String bookName) {
BookName = bookName;
}
public String getAuthor() {
return Author;
}
public void setAuthor(String author) {
Author = author;
}
public String getReader() {
return Reader;
}
public void setReader(String reader) {
Reader = reader;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
public String getTypeId() {
return TypeId;
}
public void setTypeId(String typeId) {
TypeId = typeId;
}
public String getBookDesc() {
return BookDesc;
}
public void setBookDesc(String bookDesc) {
BookDesc = bookDesc;
}
}
用ArrayList进行储存信息，if ....else语句循环执行，创建扫描器，使用户可以输入
package com.lenovo.www.entity;
/**
* private int id;
private String bookName;// 图书名称
private String author;// 作者
private String reader;// 借阅人
private String price;// 图书价格
private String TypeId;// 图书类别
private String bookDesc;// 备注
*/
import java.awt.print.Book;
import java.util.ArrayList;
import java.util.Scanner;
public class Booktest {
static ArrayList bookList = new ArrayList<>();
public Booktest(int i, String string, String string2, String string3, String string4, String string5,
String string6) {
// TODO Auto-generated constructor stub
}
public static void main(String[] args) {
System.out.println("请输入菜单序号，");
System.out.println("查询图书，1");
System.out.println("添加图书，2");
System.out.println("删除图书，3");
System.out.println("退出程序，0");
Scanner src = new Scanner(System.in);
if (src.nextInt() == 1) {
Library s1 = new Library(321, "《白鹿原》", "陈忠实", "小明", "30.00元", "文学类", " 借阅人数较多 ");
Library s2 = new Library(322, "《西游记》", "吴承恩", "小红", "35.00元", "文学类", " ");
Library s3 = new Library(323, "《红楼梦》", "曹雪芹", "小白", "36.00元", "文学类", " ");
Library s4 = new Library(324, "《水浒传》", "施耐庵", "小黑", "37.00元", "文学类", " 未到指定日期归还 ");
Library s5 = new Library(325, "《三国演义》", "罗贯中", "小明", "40.00元", "文学类", " ");
Library s6 = new Library(326, "《白夜行》", "东野奎吾", "小蓝", "35.00元", "悬疑类", " ");
bookList.add(s1);
bookList.add(s2);
bookList.add(s3);
bookList.add(s4);
bookList.add(s5);
bookList.add(s6);
for (int i = 0; i < bookList.size(); i++) {
Library a = bookList.get(i);
System.out.println("图书编号 : " + a.getId() + " 图书名称： " + a.getBookName() + " 作者： " + a.getAuthor()
+ " 借阅人姓名： " + a.getReader() + " 图书价格： " + a.getPrice() + " 图书类别 ：" + a.getTypeId()
+ " 备注： " + a.getBookDesc());
}
} else {
System.exit(0);
}
}
}
这是第一天的代码，日后不断完善
写这段代码中出现了错误
Library s1 = new Library(321, “《白鹿原》”, “陈忠实”, “小明”, “30.00元”, “文学类”, ” 借**阅人数较多 “);
Library s2 = new Library(322, “《西游记》”, “吴承恩”, “小红”, “35.00元”, “文学类”, ” “);
Library s3 = new Library(323, “《红楼梦》”, “曹雪芹”, “小白”, “36.00元”, “文学类”, ” “);
Library s4 = new Library(324, “《水浒传》”, “施耐庵”, “小黑”, “37.00元”, “文学类”, ” 未到指定日期归还 “);
Library s5 = new Library(325, “《三国演义》”, “罗贯中”, “小明”, “40.00元”, “文学类”, ” “);
Library s6 = new Library(326, “《白夜行》”, “东野奎吾”, “小蓝”, “35.00元”, “悬疑类”, ” “);
****由于粗心将Library类写成了booklist**
定义的int整形类却输入了0501这种不符合int类型的数
private int id;
Library s2 = new Library(322, "《西游记》", "吴承恩", "小红", "35.00元", "文学类", " ");
Library s2 = new Library(0501, "《西游记》", "吴承恩", "小红", "35.00元", "文学类", " ");（错误的）
“`