建一个窗体，添加组件标签伩文本域文本区/按钮，用以录入 Stundent信息：姓名/性别/学号及高等数学

建一个窗体，添加组件标签伩文本域文本区/按钮，用以录入 Stundent信息：姓名/性别/学号及高等数学
在文本区显示该学生信息，运行结果如下图所示
提示：1.除提供源程序外，必须提供程序运行截囱

package Exam;

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.reflect.InvocationTargetException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;

public class Main {
    
    public void init() {
        JFrame frame = new JFrame("学生信息");
        frame.setSize(600, 400);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container container = frame.getContentPane();
        container.setLayout(new FlowLayout()
                );
        JLabel label_name = new JLabel("姓名");
        JLabel label_sex = new JLabel("性别");
        JLabel label_id = new JLabel("学号");
        JLabel label_math = new JLabel("高等数学");
        JLabel label_eng = new JLabel("英语");
        JTextField field_name = new JTextField("        ");
        JTextField field_sex = new JTextField("          ");
        JTextField field_id = new JTextField("          ");
        JTextField field_math = new JTextField("          ");
        JTextField field_eng = new JTextField("       ");
        JTextArea textArea = new JTextArea(20,40);
        textArea.setSize(600, 200);
        JButton button = new JButton("显示信息");
        button.setSize(100, 200);
        container.add(label_name);
        container.add(field_name);
        container.add(label_sex);
        container.add(field_sex);
        container.add(label_id);
        container.add(field_id);
        container.add(label_math);
        container.add(field_math);
        container.add(label_eng);
        container.add(field_eng);
        container.add(button);
        container.add(textArea);
        frame.setVisible(true);
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String name = field_name.getText();
                String sex = field_sex.getText();
                String id = field_id.getText();
                String math = field_math.getText();
                String eng = field_eng.getText();
                double avg=(Double.parseDouble(math)+Double.parseDouble(eng))/2;
                textArea.append(name+" "+sex+" "+id+" "+math+" "+eng+" 平均分"+avg);
            }
        });
        
    }
    
    public static void main(String[] args) {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                @Override
                public void run() {
                    new Main().init();
                }
            });
        } catch (InvocationTargetException | InterruptedException e) {
            e.printStackTrace();
        }
    }

}