建一個窗體，新增元件標籤伩文字域文字區/按鈕，用以錄入 Stundent資訊：姓名/性別/學號及高等數學
在文字區顯示該學生資訊，執行結果如下圖所示
提示：1.除提供源程式外，必須提供程式執行截囪

package Exam;

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

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

public class Main {
    
    void init() {
        JFrame frame = new JFrame("學生資訊");
        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("性別");
        JLabel label_id = new JLabel("學號");
        JLabel label_math = new JLabel("高等數學");
        JLabel label_eng = new
 
 JLabel("英語");
        JTextField field_name = new JTextField("        ");
        JTextField field_sex = new JTextField("          ");
        JTextField field_id = );
        JTextField field_math = );
        JTextField field_eng = new JTextField("       ");
        JTextArea textArea = new JTextArea(20,40);
        textArea.setSize(600,200);
        JButton button = new JButton("顯示資訊");
        button.setSize(100,0);">);
        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( ActionListener() {
            @Override
             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);
            }
        });
        
    }
    
    static  main(String[] args) {
        try {
            SwingUtilities.invokeAndWait( Runnable() {
                @Override
                 run() {
                     Main().init();
                }
            });
        } catch (InvocationTargetException | InterruptedException e) {
            e.printStackTrace();
        }
    }

}