java实现猜数游戏 要求有用户登录等GUI界面，用户数据存在文件里，并体现面向对象编程思想。具体：计算机产生随机数，猜中即胜，猜不中，提示大了或小了，继续猜，直至猜到，给出所用时间和评语。 功能要求： (1)Random类及相关方法的使用； (2)要求有用户登录，记录用户成绩； (3)给出排行榜。代码

好的，以下是一个简单的Java猜数游戏的实现代码，实现了用户登录、游戏界面、排行榜等功能，希望能够帮到你。

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;

import javax.swing.*;

public class GuessNumberGame extends JFrame {
    private static final long serialVersionUID = 1L;
    private JTextField textFieldGuess;
    private JTextArea textAreaResult;
    private JLabel labelTime;
    private JButton buttonSubmit;
    private int randomNumber;
    private int guessCount;
    private long startTime;
    private User currentUser;
    private ArrayList<User> userList;
    private Timer timer;
    private JTable tableHighScore;

    public GuessNumberGame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setTitle("猜数游戏");
        setSize(500, 500);
        setResizable(false);

        // 读取用户数据
        userList = readUserList();

        // 登录界面
        JPanel panelLogin = new JPanel(new GridLayout(3, 2));
        JLabel labelUsername = new JLabel("用户名:");
        JTextField textFieldUsername = new JTextField();
        JLabel labelPassword = new JLabel("密码:");
        JPasswordField passwordField = new JPasswordField();
        JButton buttonLogin = new JButton("登录");
        panelLogin.add(labelUsername);
        panelLogin.add(textFieldUsername);
        panelLogin.add(labelPassword);
        panelLogin.add(passwordField);
        panelLogin.add(new JLabel());
        panelLogin.add(buttonLogin);

        // 游戏界面
        JPanel panelGame = new JPanel(new BorderLayout());
        JPanel panelGuess = new JPanel(new FlowLayout());
        JLabel labelGuess = new JLabel("猜一个数字(1-100):");
        textFieldGuess = new JTextField(10);
        buttonSubmit = new JButton("提交");
        panelGuess.add(labelGuess);
        panelGuess.add(textFieldGuess);
        panelGuess.add(buttonSubmit);
        textAreaResult = new JTextArea(10, 40);
        JScrollPane scrollPaneResult = new JScrollPane(textAreaResult);
        labelTime = new JLabel("所用时间: 0 秒");
        JPanel panelStatus = new JPanel(new FlowLayout());
        panelStatus.add(labelTime);
        panelGame.add(panelGuess, BorderLayout.NORTH);
        panelGame.add(scrollPaneResult, BorderLayout.CENTER);
        panelGame.add(panelStatus, BorderLayout.SOUTH);

        // 排行榜界面
        JPanel panelHighScore = new JPanel(new BorderLayout());
        String[] columnNames = {"排名", "用户名", "分数"};
        String[][] rowData = new String[userList.size()][3];
        for (int i = 0; i < userList.size(); i++) {
            rowData[i][0] = Integer.toString(i + 1);
            rowData[i][1] = userList.get(i).getUsername();
            rowData[i][2] = Integer.toString(userList.get(i).getScore());
        }
        tableHighScore = new JTable(rowData, columnNames);
        JScrollPane scrollPaneHighScore = new JScrollPane(tableHighScore);
        panelHighScore.add(scrollPaneHighScore, BorderLayout.CENTER);

        // 添加界面到窗口
        JTabbedPane tabbedPane = new JTabbedPane();
        tabbedPane.addTab("登录", panelLogin);
        tabbedPane.addTab("游戏", panelGame);
        tabbedPane.addTab("排行榜", panelHighScore);
        add(tabbedPane);

        // 添加事件处理
        buttonLogin.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String username = textFieldUsername.getText();
                String password = new String(passwordField.getPassword());
                currentUser = getUserByUsername(username);
                if (currentUser == null || !currentUser.getPassword().equals(password)) {
                    JOptionPane.showMessageDialog(null, "用户名或密码错误", "错误", JOptionPane.ERROR_MESSAGE);
                } else {
                    JOptionPane.showMessageDialog(null, "登录成功", "成功", JOptionPane.INFORMATION_MESSAGE);
                    tabbedPane.setSelectedIndex(1);
                    startGame();
                }
            }
        });

        buttonSubmit.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                try {
                    int guessNumber = Integer.parseInt(textFieldGuess.getText());
                    if (guessNumber < 1 || guessNumber > 100) {
                        throw new NumberFormatException();
                    }
                    guessCount++;
                    if (guessNumber == randomNumber) {
                        timer.stop();
                        long endTime = System.currentTimeMillis();
                        int score = 1000 / guessCount - (int) ((endTime - startTime) / 1000);
                        if (score < 0) {
                            score = 0;
                        }
                        currentUser.setScore(score);
                        textAreaResult.append("恭喜你猜对了，用时 " + (endTime - startTime) / 1000 + " 秒，得分 " + score + "\n");
                        saveUserList(userList);
                        updateHighScoreTable();
                        buttonSubmit.setEnabled(false);
                    } else if (guessNumber < randomNumber) {
                        textAreaResult.append("猜的数字太小了\n");
                    } else {
                        textAreaResult.append("猜的数字太大了\n");
                    }
                } catch (NumberFormatException ex) {
                    JOptionPane.showMessageDialog(null, "请输入1-100之间的整数", "错误", JOptionPane.ERROR_MESSAGE);
                }
            }
        });
    }

    // 启动游戏
    private void startGame() {
        randomNumber = new Random().nextInt(100) + 1;
        guessCount = 0;
        startTime = System.currentTimeMillis();
        textAreaResult.setText("");
        labelTime.setText("所用时间: 0 秒");
        buttonSubmit.setEnabled(true);
        timer = new Timer();
        timer.schedule(new TimerTask() {
            int time = 0;

            public void run() {
                time++;
                labelTime.setText("所用时间: " + time + " 秒");
            }
        }, 0, 1000);
    }

    // 根据用户名查找用户
    private User getUserByUsername(String username) {
        for (User user : userList) {
            if (user.getUsername().equals(username)) {
                return user;
            }
        }
        return null;
    }

    // 读取用户数据
    private ArrayList<User> readUserList() {
        ArrayList<User> userList = new ArrayList<User>();
        try {
            FileInputStream fis = new FileInputStream("users.dat");
            ObjectInputStream ois = new ObjectInputStream(fis);
            userList = (ArrayList<User>) ois.readObject();
            ois.close();
            fis.close();
        } catch (IOException ex) {
            // 如果文件不存在，则创建一个空的列表
            userList = new ArrayList<User>();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        return userList;
    }

    // 保存用户数据
    private void saveUserList(ArrayList<User> userList) {
        try {
            FileOutputStream fos = new FileOutputStream("users.dat");
            ObjectOutputStream oos = new ObjectOutputStream(fos);
            oos.writeObject(userList);
            oos.close();
            fos.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

    // 更新排行榜
    private void updateHighScoreTable() {
        Collections.sort(userList, new Comparator<User>() {
            public int compare(User u1, User u2) {
                return u2.getScore() - u1.getScore();
            }
        });
        String[][] rowData = new String[userList.size()][3];
        for (int i = 0; i < userList.size(); i++) {
            rowData[i][0] = Integer.toString(i + 1);
            rowData[i][1] = userList.get(i).getUsername();
            rowData[i][2] = Integer.toString(userList.get(i).getScore());
        }
        tableHighScore.setModel(new javax.swing.table.DefaultTableModel(rowData, new String[]{"排名", "用户名", "分数"}));
    }

    public static void main(String[] args) {
        GuessNumberGame game = new GuessNumberGame();
        game.setVisible(true);
    }
}

// 用户类
class User implements Serializable {
    private static final long serialVersionUID = 1L;
    private String username;
    private String password;
    private int score;

    public User(String username, String password) {
        this.username = username;
        this.password = password;
        this.score = 0;
    }

    public String getUsername() {
        return username;
    }

    public String getPassword() {
        return password;
    }

    public int getScore() {
        return score;
    }

    public void setScore(int score) {
        this.score = score;
    }
}

这份代码可能略微复杂，但是每一步都有注释，希望能够帮到你。