DVD项目

public class X {int[] count = new int[50];String[] name = new String[50];int[] state = new int[50];String[] date = new String[50];}

import java.text.*;import java.util.Date;import java.util.Scanner;public class C {Scanner input =new Scanner(System.in);X dvd=new X();public void csz(){dvd.name[0] = "备胎反击战";dvd.state[0] = 0;dvd.date[0] = "2015-11-06";dvd.count[0] = 0;dvd.name[1] = "煎饼侠";dvd.state[1] = 1;dvd.date[1] = "2015-7-17";dvd.count[1] = 0;dvd.name[2] = "夏洛特烦恼";dvd.state[2] = 0;dvd.date[2] = "2015-10-11";dvd.count[2] = 0;}public void sy (){System.out.println("**************************\n");System.out.println("\t欢迎使用迷你 DVD 管理器");System.out.println("**************************\n");System.out.println("0.借出排行榜");System.out.println("1.新增DVD");System.out.println("2.查看DVD");System.out.println("3.删除DVD");System.out.println("4.借出DVD");System.out.println("5.归还DVD");System.out.println("6.退       出");System.out.println("*******************************");System.out.println("请输入:");int num=input.nextInt();switch(num){case 0:list();System.out.println("************************");returnMian();break;case 1:add();System.out.println("************************");returnMian();break;case 2:search();System.out.println("************************");returnMian();break;case 3:sc();System.out.println("************************");returnMian();break;case 4:jc();System.out.println("************************");returnMian();break;case 5:gh();System.out.println("************************");returnMian();break;case 6:System.out.println("谢谢你的使用~~");System.out.println("************************");returnMian();break;    }}public void returnMian(){System.out.println("输入0返回:");if(input.nextInt()==0){sy ();}else{System.out.println("输入错误,异常终止~~");}}public void list(){String []newname=new String[50];int []newcount=new int[50];for (int i = 0; i < dvd.name.length; i++) {newname[i]=dvd.name[i];newcount[i]=dvd.count[i];}for (int i = 0; i < newname.length; i++) {for (int j = i+1; j < newname.length; j++) {if(newcount[i]>newcount[j]){int temp=newcount[i];newcount[i]=newcount[j];newcount[j]=temp;String temp1=newname[i];newname[i]=newname[j];newname[j]=temp1;}}}System.out.println("次数\t名称");for (int i =  newname.length-1;i>=0; i--) {if(newname[i]!=null){System.out.println(newcount[i]+"\t《"+newname[i]+"》");}}}public void add(){System.out.println("-------------------------------------->新增DVD\n");System.out.print("请输入DVD名称:");for (int i = 0; i < dvd.name.length; i++) {if (dvd.name[i] == null) {dvd.name[i] = input.next();System.out.print("请输入日期:");dvd.date[i] = input.next();dvd.state[i] = 1;System.out.println(dvd.name[i] + "新增成功！");break;}}}public void search(){System.out.println("-------------------------------------->查看DVD\n");System.out.println("序号\t状态\t名称\t\t借出日期");for (int i = 0; i < dvd.name.length; i++) {if(dvd.name[i]==null){break;}else if(dvd.state[i]==0){System.out.println((i+1)+"\t已借出\t"+"《"+dvd.name[i]+"》"+"\t"+dvd.date[i]);}else if(dvd.state[i]==1){System.out.println((i+1)+"\t可借\t"+"《"+dvd.name[i]+"》");}}}public void sc(){System.out.println("-------------------------------------->删除DVD\n");System.out.println("请输入删除的名字:");String s=input.next();for (int i = 0; i < dvd.name.length; i++) {if (dvd.name[i] != null && dvd.name[i].equals(s)&& dvd.state[i] == 1) {int j=i;while(dvd.name[j+1]!=null){dvd.name[j]=dvd.name[j+1];dvd.state[j]=dvd.state[j+1];dvd.date[j]=dvd.date[j+1];j++;}dvd.name[j]=null;dvd.date[j]=null;System.out.println("删除"+"<<"+s+">>"+"成功~~");returnMian();break;}else if(dvd.name[i]!=null&&dvd.name[i].equalsIgnoreCase(s)&&dvd.state[i]==0){System.out.println(dvd.name[i]+"为借出状态!");returnMian();}}}public void jc(){System.out.println("-------------------------------------->借出DVD\n");System.out.println("请输入DVD的名称：");String name=input.next();for (int i = 0; i <dvd.name.length; i++) {if(dvd.name[i]==null){System.out.println("没有找到匹配信息!");break;}else if(dvd.name[i].equals(name)&&dvd.state[i]==1){System.out.println("请输入借出的年月日:");dvd.date[i]=input.next();System.out.println("《"+name+"》"+"借出成功~~");dvd.state[i]=0;dvd.count[i]++;break;}else if(dvd.name[i].equals(name)&&dvd.state[i]==0){System.out.println("不好意思，《"+name+"》已被借出！");break;}}}public void gh(){System.out.println("-------------------------------------->归还DVD\n");System.out.println("请输入DVD的名称：");String name=input.next();for (int i = 0; i <= dvd.name.length; i++) {if(dvd.name[i]==null){System.out.println("没有找到匹配信息~~");break;}else if (dvd.name[i].equals(name) && dvd.state[i] == 0) {System.out.print("请输入归还的日期:");String redate = input.next();System.out.println(name + "归还成功！");System.out.println("借出日期为:" + dvd.date[i]);System.out.println("归还日期为:" + redate);String d1 = dvd.date[i];String d2 = redate;long day = charge(d2, d1);System.out.println("应付租金:" + day + "元");dvd.date[i] = redate;dvd.state[i] = 1;break;}else if(dvd.name[i].equals(name)&&dvd.state[i]==1){System.out.println(name+"无该DVD，输入错误。");break;}}}public long charge(String date1,String date2){long charge=0;SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");try {java.util.Date d1 =sd.parse(date1);java.util.Date d2 =sd.parse(date2);charge = (d1.getTime() - d2.getTime())/ (24 * 60 * 60 * 1000);} catch (ParseException e) {e.printStackTrace();}return charge;}}

public class Z { public static void main(String[] args) {    C dm=new C();     dm.csz();    dm.sy (); }}