Java课程内容：深入浅出，掌握Java课程核心知识

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

public class StudentFrame extends JFrame implements ActionListener {
private JLabel nameLabel, ageLabel, genderLabel, scoreLabel;
private JTextField nameText, ageText, genderText, scoreText;
private JButton addButton, removeButton, updateButton, searchButton;
private JTextArea resultArea;
private StudentSystem studentSystem;
// 构造函数
public StudentFrame() {
setTitle(“ 学生信息管理系统 ”);
setSize(400, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

nameLabel = new JLabel(“ 姓名 ”);
ageLabel = new JLabel(“ 年龄 ”);

       genderLabel = new JLabel(“ 性别 ”);

       scoreLabel = new JLabel(“ 成绩 ”);

       nameText = new JTextField(10);

       ageText = new JTextField(10);

       genderText = new JTextField(10);

       scoreText = new JTextField(10);

       addButton = new JButton(“ 添加 ”);

       removeButton = new JButton(“ 删除 ”);

       updateButton = new JButton(“ 修改 ”);

       searchButton = new JButton(“ 查询 ”);

       addButton.addActionListener(this);

       removeButton.addActionListener(this);

       updateButton.addActionListener(this);

       searchButton.addActionListener(this);

       resultArea = new JTextArea();

       resultArea.setEditable(false);

       studentSystem = new StudentSystem();

       JPanel inputPanel = new JPanel(new GridLayout(4, 2));

       inputPanel.add(nameLabel);

       inputPanel.add(nameText);

       inputPanel.add(ageLabel);

       inputPanel.add(ageText);

       inputPanel.add(genderLabel);

       inputPanel.add(genderText);

       inputPanel.add(scoreLabel);

       inputPanel.add(scoreText);

       JPanel buttonPanel = new JPanel(new GridLayout(1, 4));

       buttonPanel.add(addButton);

       buttonPanel.add(removeButton);

       buttonPanel.add(updateButton);

       buttonPanel.add(searchButton);

       JPanel resultPanel = new JPanel(new BorderLayout());

       resultPanel.add(resultArea, BorderLayout.CENTER);

       setLayout(new BorderLayout());

       add(inputPanel, BorderLayout.NORTH);

       add(buttonPanel, BorderLayout.CENTER);

       add(resultPanel, BorderLayout.SOUTH);

       setVisible(true);

}

// ActionListener 接口实现

public void actionPerformed(ActionEvent e) {

    if (e.getSource() == addButton) { // 添加学生

        String name = nameText.getText();

        int age = Integer.parseInt(ageText.getText());

        String gender = genderText.getText();

        double score = Double.parseDouble(scoreText.getText());

        Student stu = new Student(name, age, gender, score);

        studentSystem.addStudent(stu);

        resultArea.setText(“ 添加成功！”);

    } else if (e.getSource() == removeButton) { // 删除学生

        int index = Integer.parseInt(JOptionPane.showInputDialog(this, “ 请输入要删除的学生序号：”));

        studentSystem.removeStudent(index);

        resultArea.setText(“ 删除成功！”);

    } else if (e.getSource() == updateButton) { // 修改学生信息

        int index = Integer.parseInt(JOptionPane.showInputDialog(this, “ 请输入要修改的学生序号：”));

        String name = nameText.getText();

        int age = Integer.parseInt(ageText.getText());

        String gender = genderText.getText();

        double score = Double.parseDouble(scoreText.getText());

        Student stu = new Student(name, age, gender, score);

        studentSystem.updateStudent(index, stu);

        resultArea.setText(“ 修改成功！”);

    } else if (e.getSource() == searchButton) { // 查询学生信息

        String name = nameText.getText();

        Student stu = studentSystem.searchStudent(name);

        if (stu != null) {

            resultArea.setText(“ 姓名：” + stu.getName() + “n”

                    + “ 年龄：” + stu.getAge() + “n”

                    + “ 性别：” + stu.getGender() + “n”

                    + “ 成绩：” + stu.getScore());

        } else {

            resultArea.setText(“ 对不起，没有找到该学生！”);

        }

    }

}

public static void main(String[] args) {

    new StudentFrame();

}