DVD

<pre class="java" name="code">DVD的测试类

public class Dome2 {
public static void main(String[] args) {
	Dome1 v=new Dome1();
	v.Show1();
}
}

DVD所有方法

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

public class Dome1 {
	String[] name = new String[50];//存DVD的名字

	int[] state = new int[50];//记录DVD的状态
	String[] date = new String[50];//记录DVD的日期
	int[] count = new int[50];//记录DVD的借出次数
	Scanner input = new Scanner(System.in);

//目录

	public void Show() {
		System.out.println("欢迎使用迷你DVD管理系统");
		System.out.println("------------------");
		System.out.println("0.查看排行榜");
		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");
	}

	public void Show1() {
		Show2();
		boolean flag = true;
		do {
			Show();
			System.out.print("请选择:");
			int num = input.nextInt();
			switch (num) {
			case 0:
				list();
				break;
			case 1:
			
				Show3();
				break;
			case 2:
				
				Show4();
				break;
			case 3:
				sc();
				break;
			case 4:
				jc();
				break;
			case 5:
				gh();
				break;
			case 6:
				System.out.println("谢谢使用!");
				flag = false;
				break;
			}

		} while (flag);
	}

//初始化

	public void Show2() {
		name[0] = "罗马假日";
		state[0] = 0;
		date[0] = "2013-01-17";
		name[1] = "风声鹤唳";
		state[1] = 1;
		name[2] = "浪漫满屋";
		state[2] = 1;
	}
显示DVD	

public  void Show4() {

	for (int i = 0; i < name.length; i++) {
			
		if (name[i] == null) {
				break;
			} else if (state[i] == 0) {
				System.out.println((i + 1) + "\t已借出\t" + "<<" + name[i]
						+ ">>\t" + date[i]);
			} else if (state[i] == 1) {
				System.out.println((i + 1) + "\t可借出\t" + "<<" + name[i] + ">>");
			}
		}
	}
DVD的排行榜

	public void list(){
		//Show2();
		String []newname=new String[50];
		int []newcount=new int[50];
		for (int i = 0; i < name.length; i++) {
			newname[i]=name[i];
			newcount[i]=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]+"》");
				}
			}
	}

新增DVD

public void Show3() {
     System.out.print("请输入你新增的名字:");
     String name1=input.next();
     for (int i = 0; i <name.length; i++) {
		if(name[i]==null){
			name[i]=name1;
		    state[i]=1;
	         System.out.println("新增"+"<<"+name1+">>成功!");
		    break;
		}else if(i==name.length-1){
			System.out.println("失败!");
		}
	}
	}
	//删除信息
	public void sc(){						
		System.out.println("-------------------------------------->删除DVD\n");
		System.out.print("请输入删除的名字:");
		String s=input.next();
		for (int i = 0; i < name.length; i++) {
			if(name[i]==null){
				System.out.println("没有找到匹配信息!");
				break;
			}else if (name[i] != null && name[i].equals(s)
					&& state[i] == 1) {
				int j=i;
				while(name[j+1]!=null){
					name[j]=name[j+1];
					state[j]=state[j+1];
					date[j]=date[j+1];
					j++;
				}
				name[j]=null;
				date[j]=null;
				System.out.println("删除"+"<<"+s+">>"+"成功~~");
				break;
			}else if(name[i]!=null
				&&name[i].equalsIgnoreCase(s)&&state[i]==0){
				System.out.println(name[i]+"为借出状态!");
			}
		}
	}
	//借出DVD
	public void jc(){
		System.out.println("-------------------------------------->借出DVD\n");
		System.out.print("请输入DVD的名称：");
		String name1=input.next();
		for (int i = 0; i <name.length; i++) {
			if(name[i]==null){
				System.out.println("没有找到匹配信息!");
				break;
			}else if(name[i].equals(name1)&&state[i]==1){
				System.out.print("请输入借出的年月日:");
				date[i]=input.next();
				System.out.println("《"+name1+"》"+"借出成功~~");
				state[i]=0;
				count[i]++;
				break;
			}else if(name[i].equals(name1)&&state[i]==0){
				System.out.println("不好意思，《"+name1+"》已被借出！");
				break;
				
			}
	}
}	
	//归还DVD
	public void gh(){
		System.out.println("-------------------------------------->归还DVD\n");
		System.out.print("请输入DVD的名称：");
		String name1=input.next();
		for (int i = 0; i <= name.length; i++) {
			if(name[i]==null){
				System.out.println("没有找到匹配信息~~");
				break;
			}else if (name[i].equals(name1) && state[i] == 0) {
				System.out.print("请输入归还的日期:");
				String redate = input.next();
				System.out.println(name1 + "归还成功！");
				System.out.println("借出日期为:" + date[i]);
				System.out.println("归还日期为:" + redate);
				String d1 = date[i];
				String d2 = redate;
				long day = charge(d2, d1);
				System.out.println("应付租金:" + day + "元");
				date[i] = redate;
				state[i] = 1;
				break;
			}else if(name[i].equals(name1)&&state[i]==1){
				System.out.println(name1+"可借DVD，输入错误。");
				break;
			}
		}
	}
	//计算时期差
	
	public long charge(String date1,String date2){
		long charge=0;
		SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
		try {
			Date d1 =sd.parse(date1);
			Date d2 =sd.parse(date2);
			charge = (d1.getTime() - d2.getTime())/ (24 * 60 * 60 * 1000);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return charge;
	}
}