要求使用对象和类，继承、多态、抽象类、接口、数组、集合、 Swing 框架等知识点。写一个学生管理系统

好的，我可以帮您写一个简单的学生管理系统。首先，我们需要定义一个学生类，包含学生的姓名、学号、年龄、性别等属性。代码如下：

public class Student {
    private String name;
    private String id;
    private int age;
    private String gender;

    public Student(String name, String id, int age, String gender) {
        this.name = name;
        this.id = id;
        this.age = age;
        this.gender = gender;
    }

    public String getName() {
        return name;
    }

    public String getId() {
        return id;
    }

    public int getAge() {
        return age;
    }

    public String getGender() {
        return gender;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setId(String id) {
        this.id = id;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", id='" + id + '\'' +
                ", age=" + age +
                ", gender='" + gender + '\'' +
                '}';
    }
}

接下来，我们需要定义一个学生管理系统类，包含添加学生、删除学生、修改学生信息、查询学生信息等操作。代码如下：

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

public class StudentManagementSystem extends JFrame implements ActionListener {
    private JLabel nameLabel, idLabel, ageLabel, genderLabel;
    private JTextField nameTextField, idTextField, ageTextField, genderTextField;
    private JButton addButton, deleteButton, updateButton, searchButton, clearButton;
    private JTextArea infoTextArea;
    private ArrayList<Student> studentList;

    public StudentManagementSystem() {
        setTitle("学生管理系统");
        setSize(500, 500);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        JPanel inputPanel = new JPanel(new GridLayout(4, 2));
        nameLabel = new JLabel("姓名：");
        inputPanel.add(nameLabel);
        nameTextField = new JTextField();
        inputPanel.add(nameTextField);
        idLabel = new JLabel("学号：");
        inputPanel.add(idLabel);
        idTextField = new JTextField();
        inputPanel.add(idTextField);
        ageLabel = new JLabel("年龄：");
        inputPanel.add(ageLabel);
        ageTextField = new JTextField();
        inputPanel.add(ageTextField);
        genderLabel = new JLabel("性别：");
        inputPanel.add(genderLabel);
        genderTextField = new JTextField();
        inputPanel.add(genderTextField);
        add(inputPanel, BorderLayout.NORTH);

        JPanel buttonPanel = new JPanel(new FlowLayout());
        addButton = new JButton("添加");
        addButton.addActionListener(this);
        buttonPanel.add(addButton);
        deleteButton = new JButton("删除");
        deleteButton.addActionListener(this);
        buttonPanel.add(deleteButton);
        updateButton = new JButton("修改");
        updateButton.addActionListener(this);
        buttonPanel.add(updateButton);
        searchButton = new JButton("查询");
        searchButton.addActionListener(this);
        buttonPanel.add(searchButton);
        clearButton = new JButton("清空");
        clearButton.addActionListener(this);
        buttonPanel.add(clearButton);
        add(buttonPanel, BorderLayout.CENTER);

        infoTextArea = new JTextArea();
        JScrollPane scrollPane = new JScrollPane(infoTextArea);
        add(scrollPane, BorderLayout.SOUTH);

        studentList = new ArrayList<>();
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == addButton) {
            String name = nameTextField.getText();
            String id = idTextField.getText();
            int age = Integer.parseInt(ageTextField.getText());
            String gender = genderTextField.getText();
            Student student = new Student(name, id, age, gender);
            studentList.add(student);
            infoTextArea.append("添加学生成功：" + student.toString() + "\n");
        } else if (e.getSource() == deleteButton) {
            String id = idTextField.getText();
            for (int i = 0; i < studentList.size(); i++) {
                if (studentList.get(i).getId().equals(id)) {
                    Student student = studentList.remove(i);
                    infoTextArea.append("删除学生成功：" + student.toString() + "\n");
                    break;
                }
            }
        } else if (e.getSource() == updateButton) {
            String id = idTextField.getText();
            for (int i = 0; i < studentList.size(); i++) {
                if (studentList.get(i).getId().equals(id)) {
                    Student student = studentList.get(i);
                    student.setName(nameTextField.getText());
                    student.setAge(Integer.parseInt(ageTextField.getText()));
                    student.setGender(genderTextField.getText());
                    infoTextArea.append("修改学生信息成功：" + student.toString() + "\n");
                    break;
                }
            }
        } else if (e.getSource() == searchButton) {
            String id = idTextField.getText();
            for (int i = 0; i < studentList.size(); i++) {
                if (studentList.get(i).getId().equals(id)) {
                    Student student = studentList.get(i);
                    infoTextArea.append("查询学生信息成功：" + student.toString() + "\n");
                    break;
                }
            }
        } else if (e.getSource() == clearButton) {
            nameTextField.setText("");
            idTextField.setText("");
            ageTextField.setText("");
            genderTextField.setText("");
            infoTextArea.setText("");
        }
    }

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

这个学生管理系统使用了 Swing 框架构建用户界面，并且实现了添加学生、删除学生、修改学生信息、查询学生信息、清空输入框等操作。您可以根据需求进行修改和扩展。