成绩录入

package HelloJava;  
import java.awt.BorderLayout;  
import java.awt.Container;  
import java.awt.GridLayout;  
import java.awt.event.*;  
import java.security.cert.CollectionCertStoreParameters;  
  
import javax.swing.*;  
import javax.swing.text.Document;  
import java.util.*;  
  
public class Myb extends JFrame implements ActionListener {  
     JLabel interestLabel = new JLabel("姓名");   
     JTextField text = new  JTextField();     
     JLabel interestLabe2 = new JLabel("成绩");   
     JTextField text1 = new  JTextField();  
     JButton button = new JButton ("确认");  
    JTextArea textArea = new JTextArea(5,25);  
  
    List<paixun> list = new ArrayList<paixun>();  
     Myb()  
     {  
          super("work");  
          Container contentPane = getContentPane();         
          JPanel northPanel = new JPanel();  
          northPanel.setLayout(new GridLayout(2,1));    
          Box box1 = Box.createHorizontalBox();  
          Box box2 = Box.createHorizontalBox();            
          box1.add(Box.createHorizontalStrut(3));  
          box1.add(interestLabel );  
          text.setColumns(5);    
          box1.add(text );  
          box1.add(interestLabe2 );  
          box1.add(text1);  
          button.addActionListener(new ActionListener() {             
            @Override  
            public void actionPerformed(ActionEvent e) {  
                  
                // TODO 自动生成的方法存根  
                textArea.setText("");  
                list.add(new paixun(text.getText().toString(),Double.parseDouble(text1.getText().toString())));  
                 Collections.sort(list);  
                for(paixun p:list)  
                  textArea.setText(textArea.getText()+"\n"+p.name +"\t"+p.Grade+ "分");   
                   
                text.setText("");  
                text1.setText("");  
            }  
        });   
          box1.add(button);          
          northPanel.add(box1);          
          contentPane.add(northPanel, BorderLayout.NORTH);             
          JScrollPane scrollPane = new JScrollPane(textArea);  
          contentPane.add(scrollPane, BorderLayout.CENTER);  
          setVisible(true);  
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
          setSize(400, 300);  
     }   
     public void actionPerformed(ActionEvent e)           
          {    
              return;   
          }  
     class paixun implements Comparable<paixun>{  
         public String name;  
         public Double Grade;  
         paixun(String name,Double Grade){  
             this.name=name;  
             this.Grade=Grade;  
         }  
        @Override  
        public int compareTo(paixun o) {  
            // TODO 自动生成的方法存根  
            return Grade.compareTo(o.Grade);  
        }  
     
     }  
     public static void main(String args[])  
     {  
          new Myb();  
     }  
}