ArrayList集合做DVD租赁项目

好的，下面是使用ArrayList集合实现DVD租赁项目的简单示例代码：

import java.util.ArrayList;
import java.util.Scanner;

public class DVDStore {

    private ArrayList<DVD> dvdList = new ArrayList<DVD>();
    private ArrayList<DVD> rentedList = new ArrayList<DVD>();
    private Scanner scanner = new Scanner(System.in);

    public void addDVD() {
        System.out.println("请输入DVD名称：");
        String name = scanner.nextLine();
        System.out.println("请输入DVD分类：");
        String category = scanner.nextLine();
        DVD dvd = new DVD(name, category);
        dvdList.add(dvd);
        System.out.println("DVD添加成功！");
    }

    public void removeDVD() {
        System.out.println("请输入要删除的DVD名称：");
        String name = scanner.nextLine();
        DVD dvd = findDVD(name, dvdList);
        if (dvd != null) {
            dvdList.remove(dvd);
            System.out.println("DVD删除成功！");
        } else {
            System.out.println("未找到该DVD！");
        }
    }

    public void rentDVD() {
        System.out.println("请输入要租借的DVD名称：");
        String name = scanner.nextLine();
        DVD dvd = findDVD(name, dvdList);
        if (dvd != null) {
            dvdList.remove(dvd);
            rentedList.add(dvd);
            System.out.println("DVD租借成功！");
        } else {
            System.out.println("未找到该DVD！");
        }
    }

    public void returnDVD() {
        System.out.println("请输入要归还的DVD名称：");
        String name = scanner.nextLine();
        DVD dvd = findDVD(name, rentedList);
        if (dvd != null) {
            rentedList.remove(dvd);
            dvdList.add(dvd);
            System.out.println("DVD归还成功！");
        } else {
            System.out.println("未找到该DVD！");
        }
    }

    public void listDVDs() {
        System.out.println("DVD列表：");
        for (DVD dvd : dvdList) {
            System.out.println(dvd.getName() + " - " + dvd.getCategory());
        }
        System.out.println("已租借的DVD列表：");
        for (DVD dvd : rentedList) {
            System.out.println(dvd.getName() + " - " + dvd.getCategory());
        }
    }

    private DVD findDVD(String name, ArrayList<DVD> dvdList) {
        for (DVD dvd : dvdList) {
            if (dvd.getName().equals(name)) {
                return dvd;
            }
        }
        return null;
    }

    public static void main(String[] args) {
        DVDStore store = new DVDStore();
        boolean loop = true;
        while (loop) {
            System.out.println("DVD租赁系统");
            System.out.println("1. 添加DVD");
            System.out.println("2. 删除DVD");
            System.out.println("3. 租借DVD");
            System.out.println("4. 归还DVD");
            System.out.println("5. 显示DVD列表");
            System.out.println("6. 退出系统");
            System.out.println("请选择操作：");
            String choice = store.scanner.nextLine();
            switch (choice) {
                case "1":
                    store.addDVD();
                    break;
                case "2":
                    store.removeDVD();
                    break;
                case "3":
                    store.rentDVD();
                    break;
                case "4":
                    store.returnDVD();
                    break;
                case "5":
                    store.listDVDs();
                    break;
                case "6":
                    loop = false;
                    break;
                default:
                    System.out.println("无效的选择！");
            }
        }
        System.out.println("系统已退出！");
    }

}

class DVD {

    private String name;
    private String category;

    public DVD(String name, String category) {
        this.name = name;
        this.category = category;
    }

    public String getName() {
        return name;
    }

    public String getCategory() {
        return category;
    }

}

这个示例代码实现了DVD租赁系统的基本功能，包括添加、删除、租借、归还和显示DVD列表等操作。其中，DVD类用于封装DVD的名称和分类信息，DVDStore类用于维护DVD列表和租借列表，并提供各种操作方法，main方法用于提供用户交互界面。在实现过程中，我们使用了ArrayList集合来存储DVD对象，并通过遍历集合来查找和操作DVD对象。