1. 设计Manager类、GUI类及事件处理 (1)设计一个Manager类并编写代码， Manager类的属性有姓名，工号，基本工资，小时工资(元/小时）。自定义方法：至少包括计算月工资的方法：calSalary()。 (2)编写一个GUI类，输入manager的姓名、工号，基本工资，月工作时间（小时），创建对象，调用calSalary()方法计算出该manager的月工资，并显示在用户界面上。 2 用户登录－GUI及事件响应 编写一个JFrame框架应用程序，如图，并根据登录情况显示相应的提示信息。假设用户名为admin，密码为admin。 事件响应：输入正确的用户名和密码，系统提示“Seccussful!Username and password is correct!”，否则提示“Username or password isn't correct!” 说明：两个消息提示框不需要自己编写界面类，使用JOptionPane类调用showMessageDialog()

1. Manager类的代码如下：

public class Manager {
    private String name;
    private String id;
    private double baseSalary;
    private double hourlyWage;

    public Manager(String name, String id, double baseSalary, double hourlyWage) {
        this.name = name;
        this.id = id;
        this.baseSalary = baseSalary;
        this.hourlyWage = hourlyWage;
    }

    public double calSalary(double workHours) {
        return baseSalary + hourlyWage * workHours;
    }

    // getter and setter methods for all attributes
}

GUI类的代码如下：

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

public class ManagerGUI extends JFrame {
    private JLabel nameLabel;
    private JTextField nameField;
    private JLabel idLabel;
    private JTextField idField;
    private JLabel baseSalaryLabel;
    private JTextField baseSalaryField;
    private JLabel workHoursLabel;
    private JTextField workHoursField;
    private JButton calculateButton;
    private JLabel resultLabel;

    public ManagerGUI() {
        init();
        addComponents();
        addListeners();
    }

    private void init() {
        setTitle("Manager Salary Calculator");
        setSize(400, 250);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    private void addComponents() {
        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(5, 2));

        nameLabel = new JLabel("Name:");
        nameField = new JTextField();
        idLabel = new JLabel("ID:");
        idField = new JTextField();
        baseSalaryLabel = new JLabel("Base Salary:");
        baseSalaryField = new JTextField();
        workHoursLabel = new JLabel("Work Hours:");
        workHoursField = new JTextField();
        calculateButton = new JButton("Calculate");
        resultLabel = new JLabel();

        panel.add(nameLabel);
        panel.add(nameField);
        panel.add(idLabel);
        panel.add(idField);
        panel.add(baseSalaryLabel);
        panel.add(baseSalaryField);
        panel.add(workHoursLabel);
        panel.add(workHoursField);
        panel.add(calculateButton);
        panel.add(resultLabel);

        add(panel);
    }

    private void addListeners() {
        calculateButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String name = nameField.getText();
                String id = idField.getText();
                double baseSalary = Double.parseDouble(baseSalaryField.getText());
                double workHours = Double.parseDouble(workHoursField.getText());

                Manager manager = new Manager(name, id, baseSalary, 50.0);
                double salary = manager.calSalary(workHours);

                resultLabel.setText("Salary: " + salary);
            }
        });
    }
}

2. 用户登录GUI及事件响应的代码如下：

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

public class LoginGUI extends JFrame {
    private JLabel usernameLabel;
    private JTextField usernameField;
    private JLabel passwordLabel;
    private JPasswordField passwordField;
    private JButton loginButton;

    public LoginGUI() {
        init();
        addComponents();
        addListeners();
    }

    private void init() {
        setTitle("Login");
        setSize(300, 150);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    private void addComponents() {
        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(3, 2));

        usernameLabel = new JLabel("Username:");
        usernameField = new JTextField();
        passwordLabel = new JLabel("Password:");
        passwordField = new JPasswordField();
        loginButton = new JButton("Login");

        panel.add(usernameLabel);
        panel.add(usernameField);
        panel.add(passwordLabel);
        panel.add(passwordField);
        panel.add(loginButton);

        add(panel);
    }

    private void addListeners() {
        loginButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String username = usernameField.getText();
                String password = new String(passwordField.getPassword());

                if (username.equals("admin") && password.equals("admin")) {
                    JOptionPane.showMessageDialog(null, "Seccussful! Username and password is correct!");
                } else {
                    JOptionPane.showMessageDialog(null, "Username or password isn't correct!");
                }
            }
        });
    }
}