用java面向对象创建三个类实现用户的注册登录
时间: 2024-05-25 07:15:47 浏览: 18
以下是基于Java面向对象创建三个类实现用户的注册和登录的示例代码:
1. User类
public class User {
private String username;
private String password;
public User(String username, String password) {
this.username = username;
this.password = password;
}
public String getUsername() {
return username;
}
public String getPassword() {
return password;
}
}
2. UserManager类
import java.util.ArrayList;
public class UserManager {
private ArrayList<User> userList;
public UserManager() {
userList = new ArrayList<>();
}
public boolean registerUser(String username, String password) {
for (User user : userList) {
if (user.getUsername().equals(username)) {
return false;
}
}
userList.add(new User(username, password));
return true;
}
public boolean loginUser(String username, String password) {
for (User user : userList) {
if (user.getUsername().equals(username) && user.getPassword().equals(password)) {
return true;
}
}
return false;
}
}
3. Main类
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
UserManager userManager = new UserManager();
Scanner scanner = new Scanner(System.in);
while (true) {
System.out.println("请选择操作:1.注册 2.登录");
int choice = scanner.nextInt();
scanner.nextLine();
if (choice == 1) {
System.out.println("请输入用户名:");
String username = scanner.nextLine();
System.out.println("请输入密码:");
String password = scanner.nextLine();
boolean result = userManager.registerUser(username, password);
System.out.println(result ? "注册成功!" : "注册失败,用户名已存在!");
} else if (choice == 2) {
System.out.println("请输入用户名:");
String username = scanner.nextLine();
System.out.println("请输入密码:");
String password = scanner.nextLine();
boolean result = userManager.loginUser(username, password);
System.out.println(result ? "登录成功!" : "登录失败,用户名或密码错误!");
} else {
System.out.println("输入有误,请重新输入!");
}
}
}
}
运行Main类后,将会不断重复提示用户选择操作(注册或登录),并根据用户的输入执行相应的操作。用户数据将以User对象的形式保存在UserManager类的userList属性中。
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