直接上代码
import java.util.*;
import java.text.SimpleDateFormat;
import java.text.ParseException;
class DVDSet
{
String[] name =new String[50];
int[] state = new int[50];
String[] date = new String[50];
int[] count = new int[50];
}
class DVDMgr
{
DVDSet dvd = new DVDSet();
public void initial(){
dvd.count[0] = 1;
dvd.name[0] = "百年孤独";
dvd.state[0] = 0;
dvd.date[0] = "2012-2-1";
dvd.name[1] = "三国演义";
dvd.state[1] = 1;
dvd.name[2] = "三体";
dvd.state[2] = 1;
}
public void startMenu(){
Scanner reader = new Scanner(System.in);
System.out.println("噢哈哈~欢迎使用迷你DVD管理器！！！");
System.out.println("-----------------------------------------");
System.out.println("0.热门排行榜");
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.print("请选择：");
int choice = reader.nextInt();
System.out.println();
switch (choice)
{
case 0:
show();
returnMain();
break;
case 1:
add();
returnMain();
break;
case 2:
check();
returnMain();
break;
case 3:
del();
returnMain();
break;
case 4:
borrow();
returnMain();
break;
case 5:
returnDvd();
returnMain();
break;
case 6:
System.out.println("有缘再会");
break;
default :
System.out.println("就内6个数也能输错？你还是别玩了");
break;
}
}
public void returnMain(){
Scanner reader = new Scanner(System.in);
System.out.print("输入0返回主菜单:");
if(reader.nextInt() == 0){
startMenu();
}
else{
System.out.println("连个0都不会输，你可长点儿心吧！");
}
}
//各个功能方法
//排行榜
public void show(){
String[] newDvds = new String[50];
for(int i = 0; i < dvd.name.length; i++){
newDvds[i] = dvd.name[i];
}
int[] newCounts = new int[50];
for(int i = 0; i < dvd.count.length; i++){
newCounts[i] = dvd.count[i];
}
for(int i = 0; i < newDvds.length; i++){
if(newDvds[i] == null){
break;
}
for(int j = i; j < newDvds.length; j++){
if(newDvds[j] == null){
break;
}
if(newCounts[i] < newCounts[j]){
int temp = newCounts[i];
newCounts[i] = newCounts[j];
newCounts[j] = temp;
String str = newDvds[i];
newDvds[i] = newDvds[j];
newDvds[j] = str;
}
}
}
System.out.println("-----------------------------------------");
System.out.println("次数\t\t名称");
for(int i = 0; i < newDvds.length; i ++){
if(newDvds[i] == null){
break;
}
System.out.println(newCounts[i] + "\t\t" + "<<" + newDvds[i] + ">>");
}
System.out.println("-----------------------------------------");
}
//1.新增
public void add(){
Scanner reader = new Scanner(System.in);
for(int i = 0; i < dvd.name.length; i++){
if(dvd.name[i] == null ){
System.out.println("请输入要新增DVD的名字");
dvd.name[i] = reader.next();
dvd.state[i] = 1;
System.out.println("新增成功~");
break;
}
}
}
//2.查看
public void check(){
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;
}
if (dvd.state[i] == 1)
{
System.out.println( i + "\t" + "可借" + "\t" + "<<" +dvd.name[i] + ">>" );
}
else {
System.out.println( i + "\t" + "不可借" + " " + "<<" + dvd.name[i] + ">>" + "\t" + dvd.date[i]);
}
}
}
//3.删除
public void del(){
Scanner reader = new Scanner(System.in);
System.out.println("请输入要删除DVD的名字");
String name = reader.next();
for(int i = 0; i < dvd.name.length; i++){
if(dvd.name[i] == null){
System.out.println("并没有找到你所要删除的DVD");
break;
}else if(dvd.name[i].equalsIgnoreCase(name)){
if(dvd.state[i] == 0){
System.out.println("<<" + name + ">>为借出状态，不能删除！" );
break;
}
else{
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《"+name+"》成功！");
break;
}
}
}
}
//4.借出
public void borrow(){
Scanner reader = new Scanner(System.in);
System.out.println("少年，你所追寻的是那张碟啊");
String name = reader.next();
for(int i = 0; i < dvd.name.length;i++){
if(dvd.name[i] == null){
System.out.println("少年郎，然而并没有找到你想要的碟诶！");
break;
}
else if(dvd.name[i].equalsIgnoreCase(name)){
if(dvd.state[i] == 0){
System.out.println("少年郎，你要的碟已经被借走了");
break;
}else{
dvd.state[i] = 0;
System.out.println("请输入借出的日期 （年-月-日 按照格式来啊魂淡）");
dvd.date[i] = reader.next();
dvd.count[i]++;
System.out.println("现在这张" + "<<" + dvd.name[i] + ">>" + "就是你的了~\n人类的未来靠你了！！");
break;
}
}
}
}
//5归还
public void returnDvd(){
Scanner reader = new Scanner(System.in);
System.out.println("哦？来还哪张碟子啊");
String name = reader.next();
for(int i = 0; i < dvd.name.length;i++){
if(dvd.name[i] == null){
System.out.println("小伙子 你是不是记错了？我们这儿原来没这种片儿啊");
break;
}
if(dvd.name[i].equalsIgnoreCase(name)){
if(dvd.state[i] == 1){
System.out.println("这张珍藏版在我们仓库里好好放着呢 你是不是记错了");
}else{
System.out.println("现在是什么时辰 （年-月-日）");
String newDate = reader.next();
System.out.println("归还" + "<<" + name + ">>" + "成功");
System.out.println("借出日期为：" + dvd.date[i]);
System.out.println("归还日期为：" + newDate);
System.out.println("应付租金（元）" + charge(dvd.date[i],newDate));
dvd.state[i] = 1;
break;
}
}
}
}
//日期计算
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;
}
}
class MiniDvd
{
public static void main(String[] args)
{
DVDMgr dm = new DVDMgr();
dm.initial();
dm.startMenu();
}
}
