userjframe.java

用java编写的简单的成绩管理系统。对于初学者很有帮助

import java.awt.GridLayout;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import javax.swing.JComboBox;
public class UserJFrame  extends JFrame  implements ActionListener
{
    private int number=1;                                       
    
    private JTextField text_number, text_no,text_name,text_sex,text_age,text_grade;                  
     
         
    private JButton button_add;                                
    private JTextArea text_user;                                
    
    public UserJFrame()
    {
        super("显示学分积点");
        
        this.setSize(450,360);
        this.setLocation(300,240);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);    
        this.setLayout(new GridLayout(1,2));             

        
        text_user = new JTextArea();                     
        this.add(text_user);                             

        JPanel panel = new JPanel(new GridLayout(2,1));  
        this.add(panel);                                 
        
        text_number = new JTextField("1");               
        text_number.setEditable(false);                  
        panel.add(text_number);

      text_no = new JTextField("学号");
        panel.add(text_no);
        
       
        panel.add(text_age);
        text_grade = new JTextField("成绩");
        panel.add(text_grade);
      
        button_add.addActionListener(this);
        panel.add(button_add);

        this.setVisible(true);
       
       
    }
    
    
   
    public void actionPerformed(ActionEvent e)           
    {
        if (e.getSource() == button_add)
        {
            String aline="";
            aline =text_no.getText()+","+text_name.getText()+","+text_sex.getText()+","+text_age.getText()+","+text_grade.getText();
            aline += "\n学分基点为: ";
            
           
            text_user.append(aline+"\n");                
            
            this.number++;                              
            text_number.setText(""+this.number);
            text_name.setText("姓名");
        }
    }
    
    public static void main(String arg[])
    {
        new UserJFrame();
    }
}