给出修改的代码

好的，可以考虑在另外一个类中定义一个方法来访问users列表中的用户信息，代码如下：

package 购物系统;

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

public class User {
    private String phoneNumber;
    private String password;
    private String email;
    ArrayList<User> users = new ArrayList<>();
    Scanner scanner = new Scanner(System.in);

    public User() {
        users.add(new User("12345678910", "123456","1234567890@qq.com"));
        users.add(new User("10987654321", "234567","0987654321@163.com"));
        users.add(new User("10086100106", "345678","1241433241@126.com"));
        users.add(new User("44444444444", "456789","1732215351@yeah.net"));
        users.add(new User("55555555555", "567890","8716237861@qq.com"));
    }

    public User(String phoneNumber, String password,String email) {
        this.phoneNumber = phoneNumber;
        this.password = password;
        this.email=email;
    }

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    void register() {
        System.out.println("您是否想添加新用户？（y/n）");
        String choice = scanner.nextLine();
        if (choice.equals("y")) {
            System.out.println("请输入新用户的手机号码：");
            String newPhoneNumber = scanner.nextLine();
            System.out.println("请输入新用户的密码：");
            String newPassword = scanner.nextLine();
            System.out.println("请输入新用户的邮箱：");
            String newEmail = scanner.nextLine();
            User newUser = new User(newPhoneNumber, newPassword,newEmail);
            users.add(newUser);
            System.out.println("新用户添加成功。");
        }
    }

    void land(){
        boolean isLoginSuccessful = false;
        User currentUser = null;
        while (!isLoginSuccessful) {
            System.out.println("请输入手机号码：");
            String phoneNumber = scanner.nextLine();
            System.out.println("请输入密码：");
            String password = scanner.nextLine();
            for (User user : users) {
                if (user.getPhoneNumber().equals(phoneNumber) && user.getPassword().equals(password)) {
                    isLoginSuccessful = true;
                    currentUser = user;
                    break;
                }
            }
            if (isLoginSuccessful) {
                System.out.println("登录成功。当前用户：" + currentUser.getPhoneNumber());
            }else {
                System.out.println("手机号码或密码无效，请重试。");
            }
        }
    }

    void forgotPassword() {
        while (true) {
            System.out.println("请输入手机号码：");
            String phoneNumber = scanner.nextLine();
            User userFound = null;
            for (User user : users) {
                if (user.getPhoneNumber().equals(phoneNumber)) {
                    userFound = user;
                    break;
                }
            }
            if (userFound == null) {
                System.out.println("手机号码错误，请重新输入！");
                continue;
            }
            while (true) {
                System.out.println("请输入用户的邮箱：");
                String email = scanner.nextLine();
                if (!userFound.getEmail().equals(email)) {
                    System.out.println("邮箱错误，请重新输入！");
                    continue;
                }
                System.out.println("验证成功，请输入新密码：");
                String password = scanner.nextLine();
                userFound.setPassword(password);
                System.out.println("修改成功！");
                return;
            }
        }
    }

    public void print() {
        System.out.println("当前登录账户： " + this.getPhoneNumber() + "\n邮箱： " + this.getEmail());
    }

    public void printAllUsers() {
        System.out.println("所有用户信息如下：");
        for (User user : users) {
            System.out.println("手机号码：" + user.getPhoneNumber() + "\n邮箱：" + user.getEmail() + "\n");
        }
    }
}

在上面的代码中，我们新增了一个名为printAllUsers的方法，它遍历了users列表中的所有用户，并显示了他们的手机号码和邮箱信息。您可以在需要显示所有用户信息的时候调用该方法。