java完整的第一个项目

import java.io.*; import java.lang.Integer.*; public class borrowbook public static String personname; public static double smoney=0,s=0; public static void main(String args) InputStreamReader is=new InputStreamReader(System.in); BufferedReader br=new BufferedReader(is); int choose; System.out.println(“*“); System.out.println(“* *“); System.out.println(“* 欢迎使用图书租赁系统 *“); System.out.println(“* *“); System.out.println(“*“); System.out.println(“1 租书 2 还书“); System.out.println(“请输入你的选择:“); try choose=Integer.parseInt(br.readLine(); switch(choose) case 1:user.borrowbook();break; /case 2:givebook();break; default: System.out.println(“你的选择错误!“); catch(IOException e) System.out.println(“错误!“); class user static double smoney=0,s=0; public static void borrowbook() InputStreamReader is=new InputStreamReader(System.in); BufferedReader br=new BufferedReader(is); String _bookname=new String255; int _day=new int255; 2 double _smoney=new double255; String flage=“y“; String bookname; int code=0,day=0,i=0; String personname1=“ “; try rental h=new rental(); System.out.println(“请输入你的姓名:“); personname1=br.readLine(); while(flage.equalsIgnoreCase(“y“) System.out.println(“请输入书的名字:“); bookname=br.readLine(); System.out.println(“请输入书的编号:“); code=Integer.parseInt(br.readLine(); System.out.println(“请输入你要借的天数:“); day=Integer.parseInt(br.readLine(); smoney=rental.money(code,day); s+=smoney; _booknamei=bookname; _smoneyi=smoney; _dayi=day; i=i+1; System.out.println(“是否继续借书?(y/n)“); flage=br.readLine(); catch(IOException e) System.out.println(“输入错误!“); try br.close(); is.close(); catch(IOException e) System.out.println(“输入错误!“); System.out.println(“-“); System.out.println(“- “+personname1+“ “+“借书记录“+“ 3 -“);