最后一章代码

<pre class="java" name="code">public class Star {public static void main(String[] args) {DVDMgr dm=new DVDMgr();dm.initial();dm.startMenu();}}

package com.gd.text;public class DVDSet {  String[] name=new String[50];  int[] state=new int[50];  String[] date=new String[50];  int[] count=new int[50];}

package com.gd.text;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.*;public class DVDMgr {DVDSet dvd = new DVDSet();public void initial() {dvd.name[0] = "罗马假日";dvd.state[0] = 0;dvd.date[0] = "2013-7-1";dvd.name[1] = "风声鹤唳";dvd.state[1] = 1;dvd.name[2] = "浪漫满屋";dvd.state[2] = 1;dvd.count[0] = 0;}public void startMenu() {Scanner input = new Scanner(System.in);System.out.println("欢迎使用迷你DVD管理器");System.out.println("--------------------------------");System.out.println("1.新增DVD\n2.查看DVD\n3.删除DVD\n4.借出DVD\n5.归还DVD\n6.退出");System.out.println("--------------------------------");System.out.print("请选择: ");int choice = input.nextInt();switch (choice) {case 1:System.out.println("---> 新增DVD");add();System.out.println("********************************");returnMain();break;case 2:System.out.println("---> 查看DVD");search();System.out.println("********************************");returnMain();break;case 3:System.out.println("---> 删除DVD");delete();System.out.println("********************************");returnMain();break;case 4:System.out.println("---> 借出DVD");lend();System.out.println("********************************");returnMain();break;case 5:System.out.println("---> 归还DVD");returnDvd();System.out.println("********************************");returnMain();break;case 6:System.out.println("谢谢使用");break;}}public void returnMain() {Scanner input = new Scanner(System.in);System.out.print("输入0返回: ");if (input.nextInt() == 0) {startMenu();} else {System.out.println("输出错误,异常终止");}}public void add() {Scanner input = new Scanner(System.in);System.out.print("请输入DVD名称: ");String name = input.next();for (int i = 0; i < dvd.name.length; i++) {if (dvd.name[i] == null) {dvd.name[i] = name;dvd.state[i] = 1;break;}}System.out.println("新增<<" + name + ">>成功");}public void search() {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 boolean delete() {Scanner input = new Scanner(System.in);boolean flag = false;System.out.print("请输入DVD名称: ");String name = input.next();for (int i = 0; i < dvd.name.length; i++) {if (dvd.name[i] != null && dvd.name[i].equalsIgnoreCase(name)&& dvd.state[i] == 1) {int j = 1;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 <<" + name + ">> 成功");flag = true;break;} else if (dvd.name[i] != null&& dvd.name[i].equalsIgnoreCase(name) && dvd.state[i] == 0) {System.out.println("<<" + name + ">>为借出状态,不能删除");flag = true;break;}if(flag == false){System.out.println("未找到该DVD");}}}public void lend() {Scanner input = new Scanner(System.in);System.out.print("请输入DVD名称: ");String want = 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].equalsIgnoreCase(want) && dvd.state[i] == 1) {System.out.print("请输入借出日期(年-月-日): ");dvd.date[i] = input.next();dvd.count[i]++;System.out.println("借出<<" + want + ">>成功");dvd.state[i] = 0;break;} else if (dvd.name[i].equalsIgnoreCase(want) && dvd.state[i] == 0) {System.out.println("<<" + want + ">>已借出");break;}}}public void returnDvd() {Scanner input = new Scanner(System.in);System.out.print("请输入DVD名称: ");String retu = input.next();double money = 0;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].equalsIgnoreCase(retu) && dvd.state[i] == 0) {System.out.print("请输入归还日期(年-月-日): ");String date = input.next();money = charge(dvd.date[i], date);System.out.println("\n<<" + retu + ">>归还成功!");System.out.println("借出日期为:" + dvd.date[i]);System.out.println("还书日期为:" + date);System.out.println("应付租金(1元/天)" + money);System.out.println("归还<<" + retu + ">>成功");dvd.state[i]=0;dvd.date[i]="";break;} else if (dvd.name[i].equalsIgnoreCase(retu) && dvd.state[i] == 1) {System.out.println("<<" + retu + ">>未借出");break;}}}public long charge(String dstr1, String dstr2) {long charge = 0;SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");try {Date d1 = sd.parse(dstr1);Date d2 = sd.parse(dstr2);charge = (d2.getTime() - d1.getTime()) / (24 * 60 * 60 * 1000);} catch (ParseException e) {e.printStackTrace();}return charge;}}