如何在Java中编写任务和待办事项程序？

public class Task {
    private String title;
    private String description;
    private Date deadline;
    
    // 构造函数
    public Task(String title, String description, Date deadline) {
        this.title = title;
        this.description = description;
        this.deadline = deadline;
    }
    
    // 获取任务标题
    public String getTitle() {
        return title;
    }
    
    // 获取任务描述
    public String getDescription() {
        return description;
    }
    
    // 获取任务截止日期
    public Date getDeadline() {
        return deadline;
    }
}

import java.util.ArrayList;
import java.util.List;

public class TodoList {
    private List<Task> tasks;
    
    // 构造函数
    public TodoList() {
        tasks = new ArrayList<>();
    }
    
    // 添加任务
    public void addTask(Task task) {
        tasks.add(task);
    }
    
    // 获取所有任务
    public List<Task> getAllTasks() {
        return tasks;
    }
    
    // 根据标题查找任务
    public Task findTaskByTitle(String title) {
        for (Task task : tasks) {
            if (task.getTitle().equals(title)) {
                return task;
            }
        }
        return null;
    }
    
    // 删除任务
    public void deleteTask(Task task) {
        tasks.remove(task);
    }
}

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

public class Main {
    public static void main(String[] args) {
        TodoList todoList = new TodoList();
        Scanner scanner = new Scanner(System.in);
        
        while (true) {
            System.out.println("1. 添加任务");
            System.out.println("2. 查看所有任务");
            System.out.println("3. 根据标题查找任务");
            System.out.println("4. 删除任务");
            System.out.println("0. 退出");
            System.out.print("请输入操作编号：");
            
            int choice = scanner.nextInt();
            scanner.nextLine();
            
            switch (choice) {
                case 1:
                    System.out.print("请输入任务标题：");
                    String title = scanner.nextLine();
                    System.out.print("请输入任务描述：");
                    String description = scanner.nextLine();
                    System.out.print("请输入任务截止日期（yyyy-MM-dd）：");
                    String deadlineStr = scanner.nextLine();
                    try {
                        Date deadline = new SimpleDateFormat("yyyy-MM-dd").parse(deadlineStr);
                        Task task = new Task(title, description, deadline);
                        todoList.addTask(task);
                        System.out.println("任务添加成功！");
                    } catch (ParseException e) {
                        System.out.println("日期格式错误！");
                    }
                    break;
                case 2:
                    List<Task> allTasks = todoList.getAllTasks();
                    System.out.println("所有任务：");
                    for (Task task : allTasks) {
                        System.out.println("标题：" + task.getTitle());
                        System.out.println("描述：" + task.getDescription());
                        System.out.println("截止日期：" + task.getDeadline());
                        System.out.println("--------------");
                    }
                    break;
                case 3:
                    System.out.print("请输入任务标题：");
                    String searchTitle = scanner.nextLine();
                    Task foundTask = todoList.findTaskByTitle(searchTitle);
                    if (foundTask != null) {
                        System.out.println("标题：" + foundTask.getTitle());
                        System.out.println("描述：" + foundTask.getDescription());
                        System.out.println("截止日期：" + foundTask.getDeadline());
                    } else {
                        System.out.println("未找到相关任务！");
                    }
                    break;
                case 4:
                    System.out.print("请输入任务标题：");
                    String deleteTitle = scanner.nextLine();
                    Task deleteTask = todoList.findTaskByTitle(deleteTitle);
                    if (deleteTask != null) {
                        todoList.deleteTask(deleteTask);
                        System.out.println("任务删除成功！");
                    } else {
                        System.out.println("未找到相关任务！");
                    }
                    break;
                case 0:
                    System.out.println("程序已退出！");
                    System.exit(0);
                default:
                    System.out.println("无效操作！");
            }
            
            System.out.println();
        }
    }
}