package login;
import java.awt.*;
import javax.swing.*;
public class UserUI {
	public void initUI(){
		System.out.println ("UserUI");
		//界面
		JFrame jf = new JFrame ("用戶界面");
		jf.setSize (400, 400);//窗體大小
		jf.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);//窗體關(guān)閉方式
		jf.setLocationRelativeTo (null);// 居中
		jf.setLayout (new FlowLayout ());
		// 創(chuàng)建組件對(duì)象
		//在界面中顯示一張圖片：
		ImageIcon imgIcon = new ImageIcon ("src/login/111.png");//圖標(biāo)對(duì)象
		JLabel imgjla = new JLabel (imgIcon);//把圖片顯示在一個(gè)標(biāo)簽里面
		JLabel accountjla = new JLabel ("賬號(hào): ");
		JTextField accountjtf = new JTextField (33);// 33個(gè)字符寬度
		JLabel passwordjla = new JLabel ("密碼: ");
		JPasswordField passwordjpf = new JPasswordField (33);// 33個(gè)字符寬度
		JButton loginjbt = new JButton ("登錄");
		JButton registjbt = new JButton ("注冊(cè)");
		// 添加組件 按順序添加
		jf.add (imgjla);
		jf.add (accountjla);
		jf.add (accountjtf);
		jf.add (passwordjla);
		jf.add (passwordjpf);
		jf.add (loginjbt);
		jf.add (registjbt);
		jf.setVisible (true);
		// 創(chuàng)建監(jiān)聽器對(duì)象 并添加給登錄注冊(cè)按鈕
		UIListener uiListener = new UIListener ();
		loginjbt.addActionListener (uiListener);
		registjbt.addActionListener (uiListener);
		// 將界面上的輸入框?qū)ο笞兞棵?中存儲(chǔ)的輸入框?qū)ο蟮刂?復(fù)制一份給監(jiān)聽器對(duì)象中輸入框?qū)ο笞兞棵?
		uiListener.accountjtf = accountjtf;
		uiListener.passwordjpf = passwordjpf;
		}
		public static void main(String[] args){
			new UserUI ().initUI ();
		}
}

// 創(chuàng)建監(jiān)聽器對(duì)象 并添加給登錄注冊(cè)按鈕
        UIListener uiListener = new UIListener ();
        loginjbt.addActionListener (uiListener);
        registjbt.addActionListener (uiListener);
        // 將界面上的輸入框?qū)ο笞兞棵?中存儲(chǔ)的輸入框?qū)ο蟮刂?復(fù)制一份給監(jiān)聽器對(duì)象中輸入框?qū)ο笞兞棵?
        uiListener.accountjtf = accountjtf;
        uiListener.passwordjpf = passwordjpf;

package login;

	import javax.swing.*;
	import java.awt.event.ActionEvent;
	import java.awt.event.ActionListener;

public class UIListener implements ActionListener{
	JTextField accountjtf;
	JPasswordField passwordjpf;
	// 創(chuàng)建一個(gè)用戶數(shù)組
	User[] userList = new User[10];
	int index = 0;
	// 重寫點(diǎn)擊按鈕會(huì)調(diào)用的方法
	// ActionEvent 動(dòng)作事件 用來獲取當(dāng)前被點(diǎn)擊的按鈕的信息
	@Override
	public void actionPerformed(ActionEvent e){
		// 獲取 按鈕上的文本 用來判斷是哪個(gè)按鈕被點(diǎn)擊了
		String ac = e.getActionCommand ();
		// 獲取輸入框中的賬號(hào)密碼 進(jìn)行驗(yàn)證 登錄 注冊(cè)
		String account = accountjtf.getText ();
		String password = passwordjpf.getText ();
		System.out.println ("賬號(hào): " + account + " 密碼: " + password);
		if(account.equals ("") || password.equals ("")){
			JOptionPane.showMessageDialog (null, "賬號(hào)或密碼不能為空");
			return;
		}
		if(ac.equals ("登錄")){
			System.out.println ("登錄按鈕被點(diǎn)擊了");
			// 驗(yàn)證這個(gè)賬號(hào)是否已經(jīng)被注冊(cè)過
			for(int i = 0; i < index; i++){
				User user = userList[i];
				if(user.account.equals (account)){
					boolean isLogin = user.login (password);
					if(isLogin){
					// 彈窗
					JOptionPane.showMessageDialog (null, "登錄成功");
					// 小窗 信息顯示
					// 創(chuàng)建一個(gè)小窗對(duì)象
					JFrame jf = new JFrame ("歡迎登錄");
					jf.setSize (400, 400);
					JLabel info = new JLabel ();
					info.setText ("歡迎您: " + user.showInfo ());
					jf.add (info);
					jf.setVisible (true);
				} else{
					// 彈窗
					JOptionPane.showMessageDialog (null, "登錄錯(cuò)誤");
					}
					return;
				}
			}
			JOptionPane.showMessageDialog (null, "賬號(hào)不存在,請(qǐng)先注冊(cè)~");
		} else if(ac.equals ("注冊(cè)")){
			System.out.println ("注冊(cè)按鈕被點(diǎn)擊了");
			// 驗(yàn)證這個(gè)賬號(hào)是否已經(jīng)被注冊(cè)過
			for(int i = 0; i < index; i++){
			User user = userList[i];
			if(user.account.equals (account)){
				// 彈窗
				JOptionPane.showMessageDialog (null, "賬號(hào)已經(jīng)被注冊(cè)過了");
				return;
				}
			}
			// 循環(huán)結(jié)束后 都沒有彈窗 就表示這個(gè)賬號(hào)沒有被注冊(cè)過
			User user = new User ();
			user.account = account;
			user.password = password;
			// 將存儲(chǔ)了數(shù)據(jù)的用戶對(duì)象 存儲(chǔ)到數(shù)組中
			userList[index] = user;
			index++;
			// 彈窗
			JOptionPane.showMessageDialog (null, "注冊(cè)成功，請(qǐng)登錄~");
		}
	}
}

       if(account.equals ("") || password.equals ("")){
            JOptionPane.showMessageDialog (null, "賬號(hào)或密碼不能為空");
            return;
        }

for(int i = 0; i < index; i++){
                User user = userList[i];
                if(user.account.equals (account)){
                    boolean isLogin = user.login (password);
                }
            }
            JOptionPane.showMessageDialog (null, "賬號(hào)不存在,請(qǐng)先注冊(cè)~");

        } else if(ac.equals ("注冊(cè)")){
              System.out.println ("注冊(cè)按鈕被點(diǎn)擊了");
              // 驗(yàn)證這個(gè)賬號(hào)是否已經(jīng)被注冊(cè)過
              for(int i = 0; i < index; i++){
              User user = userList[i];
              if(user.account.equals (account)){
                // 彈窗
                JOptionPane.showMessageDialog (null, "賬號(hào)已經(jīng)被注冊(cè)過了");
                return;
                }
            }

if(user.account.equals (account)){
                    boolean isLogin = user.login (password);
                    if(isLogin){
                    // 彈窗
                    JOptionPane.showMessageDialog (null, "登錄成功");
                    // 小窗 信息顯示
                    // 創(chuàng)建一個(gè)小窗對(duì)象
                    JFrame jf = new JFrame ("歡迎登錄");
                    jf.setSize (400, 400);
                    JLabel info = new JLabel ();
                    info.setText ("歡迎您: " + user.showInfo ());
                    jf.add (info);
                    jf.setVisible (true);
                } else{
                    // 彈窗
                    JOptionPane.showMessageDialog (null, "登錄錯(cuò)誤");
                    }
                    return;
                }

package login;
	import javax.swing.*;
public class User {
	String account;
	String password;
	int score;
	boolean isOnline;
	public String showInfo(){
		String info = "賬號(hào): " + account + " 密碼: " + password + " 積分: " + score + "是否在線: " + isOnline;
		return info;
	}
	public boolean checkPwd(String pwdIn){
		if(pwdIn.equals (password)){
			return true;
		} else{
			return false;
		}
	}
	public boolean login(String pwdIn){
		if(checkPwd (pwdIn)){
			if(isOnline){
				JOptionPane.showMessageDialog (null, "賬號(hào)已經(jīng)在線了");
				return false;
			}
			isOnline = true;
			score += 5;
			return true;
		} else{
			return false;
		}
	}

}