DVD

import java.util.Scanner;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DVD {
	Scanner input = new Scanner(System.in);
	String[] name = new String[50];// 数组1存储DVD
	int[] state = new int[50];// 数组2借出或以借DVD
	String[] date = new String[50];// 数组3DVD日期

	String xuan;

	public void a() {
		int yi;

		System.out.println("欢迎使用迷你DVD管理器");
		System.out.println("------------------------------");
		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("请选择:");
		yi = input.nextInt();
		switch (yi) {
		case 1:
			System.out.println("--->新增DVD");
			System.out.println("*****************************");
			add();
			break;
		case 2:
			System.out.println("--->查看DVD");
			System.out.println("*****************************");
			d();
			break;
		case 3:
			System.out.println("--->删除DVD");
			System.out.println("*****************************");
			delete();
			break;
		case 4:
			System.out.println("--->借出DVD");
			System.out.println("*****************************");
			lend();
			break;
		case 5:
			System.out.println("归还DVD");
			System.out.println("*****************************");
			returnDvd();
			break;
		case 6:
			System.out.println("退出");
			System.out.println("*****************************");
			break;
		}
		c();
	}

	public void b() {
		// DVD dvd=new DVD();
		name[0] = "罗马假日";
		state[0] = 0;
		date[0] = "2016-7-1";
		name[1] = "风声鹤鸣";
		state[1] = 1;
		name[2] = "浪漫满屋";
		state[2] = 1;
	}

	public void c() {

		System.out.println("输入0返回");
		if (input.nextInt() == 0) {
			a();
		} else {
			System.out.println("输入异常");
		}
	}

	public void d() {

		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\t" + "<<" + name[i] + ">>");
			}
		}

	}

	public void delete() {
		System.out.println("请输入要删除DVD名字");
		boolean flag;
		String na = input.next();
		for (int i = 0; i < name.length; i++) {
			if (name[i] != null && name[i].equalsIgnoreCase(na)
					&& 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<<" + na + ">>成功!");
				flag = true;
				break;

			} else if (name[i] != null && name[i].equalsIgnoreCase(na)
					&& state[i] == 0) {
				System.out.println("<<" + na + ">>为借出状态,不能借出");
				flag = true;
				break;
			}
		}
	}

	public void add() {
		for (int i = 0; i < name.length; i++) {
			if (name[i] == null) {
				System.out.println("请输入DVD名称");
				name[i] = input.next();
				System.out.println("新增<<" + name + ">>成功!");
				break;
			}
		}
	}

	public void lend() {
		System.out.println("请输入查找DVD名");
		String want = input.next();
		for (int i = 0; i < name.length; i++) {
			if (name[i] == null) { // 无匹配
				System.out.println("没有找到匹配信息!");
				break;
			} else if (name[i].equals(want) && state[i] == 1) {
				System.out.println("找到匹配可借");
				System.out.println("请输入日期:");
				date[i] = input.next();
				state[i] = 0;
				break;
			} else if (name[i].equals(want) && state[i] == 0) {
				System.out.println("找到匹配已借出");
				break;
			}
		}

	}

	public void returnDvd() {
		System.out.println("请输入DVD名");
		String back = input.next();
		for (int i = 0; i < name.length; i++) {
			if (name[i] == null) {
				System.out.println("没有匹配信息");
				break;
			} else if (name[i].equals(back) && state[i] == 0) {
				System.out.println("<<" + back + ">>没有被借出");
				break;
			} else if (name[i].equals(back) && state[i] == 1) {
				System.out.println("请输入归还日期(年-月-日)");
				String backdate = input.next();
				System.out.println("");
				System.out.println("归还<<" + back + ">>成功");
				System.out.println("借出日期为" + date[i]);
				System.out.println("归还日期为" + backdate);
				long l = charge(date[i], backdate);
				System.out.println("应付租金(元)" + 1);
				state[i] = 0;
				date[i] = "";
				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;

	}

<pre class="java" name="code">public class dvd1 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		DVD aa = new DVD();
		aa.b();
		aa.a();

	}

}

}