package lx4;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.Scanner;


//使用者
class User{
	int id;
	String password;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	
	public User(int id,String password) {
		this.id=id;
		this.password=password;
	}
	
	public boolean equals(Object obj) {
		User user=(User)obj;
		return this.id==user.id;
	}
	
	public String toString() {
		return "{賬號："+this.id+"密碼："+this.password+"}";
	}
	
}




public class Demo3 {
    static Scanner scanner=new Scanner(System.in);
	static Collection users=new ArrayList();
		
	public static void main(String[] args) {
		// TODO Auto-generated method stub
	while(true) {
		System.out.println("請選擇功能      A(註冊 )    B(登陸)");
		String option= scanner.next();
		if("a".equalsIgnoreCase(option)) {
			reg();
			
		}else if("b".equalsIgnoreCase(option)) {
			login();
			
		}else {
			System.out.println("你的選擇有誤,請重新輸入");
		}
	}

	}
	//登陸
	public static void login() {
		System.out.println("請輸入賬號：");
		int id=scanner.nextInt();
		System.out.println("請輸入密碼:");
		String password=scanner.next();
		
		boolean isLogin =false;
		Iterator it = users.iterator();
		while(it.hasNext()){
			User user = (User) it.next();
			if(user.id==id&&user.password.equals(password)) {
				isLogin=true;
			}
		}
		if(isLogin==true) {
			System.out.println("歡迎登陸..");
		}else {
			System.out.println("使用者名稱或者密碼錯誤，登陸失敗...");
		}
		
	}
	//註冊
	public static void reg() {
		User user=null;
		while(true) {
			System.out.println("請輸入賬號：");
			int id =scanner.nextInt();
			user =new User(id,null);
			if(users.contains(user)) {
				System.out.println("該賬號已經存在，請重新輸入賬號");
			}else {
				break;
			}
		}
		System.out.println("請輸入密碼：");
		String password=scanner.next();
		user.setPassword(password);
		users.add(user);
		System.out.println("註冊成功!");
		System.out.println("當前註冊的人員："+users);
		
	}

}