请帮忙修改一下一段java小代码

Question

本人自学了一下Java,现在想做一个小系统来练一练，下面的代码在编译和运行过程都没报错，可是就完成不了想要的功能，例如在按下“添加”按钮时没有反应。请各位前辈指点指点，请指明在哪里出了问题，最好还是详细点。谢谢！
－－－－－－－－－－－－－－－－－－－－－StuM.java------------------------------------
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class StuM extends JFrame implements ActionListener
{
Container con=getContentPane(); ;
JLabel Lsnum,Lsname,Lssex,Lsgra,Lssch,Lsage,Lsmaj,Lsdor,Lshome;
    JTextField Tsnum,Tsname,Tssex,Tsgra,Tssch,Tsage,Tsmaj,Tsdor,Tshome;
JPanel topPanel,downPanel;
//JSplitPane split;
JButton Badd,Bdelete,BsetNull,Bsave,Bexit;
Dimension faceSize=new Dimension(600,400);
    public void topInit()
{ 
 this.setSize(faceSize);
 GridBagLayout gridbag=new GridBagLayout();
 GridBagConstraints gridbagcon;
 //this.setLayout(gridbag);
     Lsnum=new JLabel("学   号 :");
 Lsnum.setFont(new Font("Dialog",0,15));
 Lsname=new JLabel("姓   名 :");
     Lsname.setFont(new Font("Dialog",0,15));
 Lssex=new JLabel("性   别 :");
 Lssex.setFont(new Font("Dialog",0,15));
 Lsage=new JLabel("年  龄 :");
 Lsage.setFont(new Font("Dialog",0,15));
 Lssch=new JLabel("学  院 :");
 Lssch.setFont(new Font("Dialog",0,15));
 Lsgra=new JLabel("年  级 :");
 Lsgra.setFont(new Font("Dialog",0,15));
 Lsmaj=new JLabel("专  业 :");
 Lsmaj.setFont(new Font("Dialog",0,15));
 Lsdor=new JLabel("宿  舍 :");
 Lsdor.setFont(new Font("Dialog",0,15));
 Lshome=new JLabel("籍  贯 :");
 Lshome.setFont(new Font("Dialog",0,15));
 Tsnum=new JTextField(10);
 Tsname=new JTextField(10);
 Tssex=new JTextField(10);
 Tsage=new JTextField(10);
 Tssch=new JTextField(10);
 Tsgra=new JTextField(10);
 Tsmaj=new JTextField(10);
 Tsdor=new JTextField(10);
 Tshome=new JTextField(35);
 topPanel=new JPanel();
 topPanel.setLayout(gridbag);
 downPanel=new JPanel();
 gridbagcon=new GridBagConstraints();
 gridbagcon.gridx=0;
 gridbagcon.gridy=0;
 gridbagcon.insets=new Insets(10,10,10,15);
     gridbag.setConstraints(Lsnum,gridbagcon);
 topPanel.add(Lsnum);
 gridbagcon.gridx=1;
 gridbagcon.gridy=0;
 gridbagcon.insets=new Insets(10,1,10,30);
 gridbag.setConstraints(Tsnum,gridbagcon);
 topPanel.add(Tsnum);
 gridbagcon=new GridBagConstraints();
 gridbagcon.gridx=2;
 gridbagcon.gridy=0;
 gridbagcon.insets=new Insets(10,50,10,1);
 gridbag.setConstraints(Lsname,gridbagcon);
 topPanel.add(Lsname);
 gridbagcon.gridx=3;
 gridbagcon.gridy=0;
 gridbagcon.insets=new Insets(10,15,10,15);
 gridbag.setConstraints(Tsname,gridbagcon);
 topPanel.add(Tsname);
 gridbagcon=new GridBagConstraints();
 gridbagcon.gridx=0;
 gridbagcon.gridy=1;
 gridbagcon.insets=new Insets(10,10,10,15);
 gridbag.setConstraints(Lssex,gridbagcon);
 topPanel.add(Lssex);
 gridbagcon.gridx=1;
 gridbagcon.gridy=1;
 gridbagcon.insets=new Insets(10,1,10,30);
 gridbag.setConstraints(Tssex,gridbagcon);
 topPanel.add(Tssex);
 gridbagcon=new GridBagConstraints();
 gridbagcon.gridx=2;
 gridbagcon.gridy=1;
 gridbagcon.insets=new Insets(10,50,10,1);
 gridbag.setConstraints(Lsage,gridbagcon);
 topPanel.add(Lsage);
 gridbagcon.gridx=3;
 gridbagcon.gridy=1;
 gridbagcon.insets=new Insets(10,15,10,15);
 gridbag.setConstraints(Tsage,gridbagcon);
     topPanel.add(Tsage);
 gridbagcon=new GridBagConstraints();
 gridbagcon.gridx=0;
 gridbagcon.gridy=2;
 gridbagcon.insets=new Insets(10,10,10,15);
 gridbag.setConstraints(Lssch,gridbagcon);
 topPanel.add(Lssch);
 gridbagcon.gridx=1;
 gridbagcon.gridy=2;
 gridbagcon.insets=new Insets(10,1,10,30);
 gridbag.setConstraints(Tssch,gridbagcon);
 topPanel.add(Tssch);
 gridbagcon=new GridBagConstraints();
 gridbagcon.gridx=2;
 gridbagcon.gridy=2;
 gridbagcon.insets=new Insets(10,50,10,1);
 gridbag.setConstraints(Lsgra,gridbagcon);
 topPanel.add(Lsgra);
 gridbagcon.gridx=3;
 gridbagcon.gridy=2;
 gridbagcon.insets=new Insets(10,15,10,15);
 gridbag.setConstraints(Tsgra,gridbagcon);
 topPanel.add(Tsgra);
 gridbagcon=new GridBagConstraints();
 gridbagcon.gridx=0;
 gridbagcon.gridy=3;
 gridbagcon.insets=new Insets(10,10,10,15);
 gridbag.setConstraints(Lsmaj,gridbagcon);
 topPanel.add(Lsmaj);
 gridbagcon.gridx=1;
 gridbagcon.gridy=3;
 gridbagcon.insets=new Insets(10,1,10,30);
 gridbag.setConstraints(Tsmaj,gridbagcon);
 topPanel.add(Tsmaj);
 gridbagcon=new GridBagConstraints();
 gridbagcon.gridx=2;
 gridbagcon.gridy=3;
 gridbagcon.insets=new Insets(10,50,10,1);
 gridbag.setConstraints(Lsdor,gridbagcon);
 topPanel.add(Lsdor);
 gridbagcon.gridx=3;
 gridbagcon.gridy=3;
 gridbagcon.insets=new Insets(10,1,10,1);
 gridbag.setConstraints(Tsdor,gridbagcon);
 topPanel.add(Tsdor);
 gridbagcon=new GridBagConstraints();
 gridbagcon.gridx=0;
 gridbagcon.gridy=4;
 gridbagcon.insets=new Insets(10,10,10,15);
 gridbag.setConstraints(Lshome,gridbagcon);
 topPanel.add(Lshome);
 gridbagcon.gridx=1;
 gridbagcon.gridy=4;
 gridbagcon.insets=new Insets(10,1,10,30);
 gridbagcon.gridwidth=gridbagcon.REMAINDER;
 gridbag.setConstraints(Tshome,gridbagcon);
 topPanel.add(Tshome);
   addWindowListener(new WindowAdapter()
{
 public void windowClosing(WindowEvent e)
{System.exit(0);}
 }); //split=new JSplitPane(JSplitPane.VERTICAL_SPLIT,true,topPanel,downPanel);
con.add(topPanel,BorderLayout.CENTER); //validate();
}

Answer 1

public void downInit()
{
Badd=new JButton("添加");
downPanel.add(Badd);
Badd.addActionListener(this);
Bdelete=new JButton("删除");
downPanel.add(Bdelete);
Bdelete.addActionListener(this);
BsetNull=new JButton("清空");
downPanel.add(BsetNull);
BsetNull.addActionListener(this);
Bsave=new JButton("保存");
downPanel.add(Bsave);
Bsave.addActionListener(this);
Bexit=new JButton("退出");
downPanel.add(Bexit);
Bexit.addActionListener(this);
con.add(downPanel,BorderLayout.SOUTH);
}
public void actionPerformed(ActionEvent e)
{
Object obj=e.getSource();
if(obj==BsetNull)
{
Tsnum.setText("");Tsname.setText("");
Tssex.setText("");Tsage.setText("");
Tssch.setText("");Tsgra.setText("");
Tsmaj.setText("");Tsdor.setText("");
Tshome.setText("");
}
else if (obj==Bexit)
{System.exit(0);
}
else if (obj==Badd)
{
}
else if (obj==Bdelete)
{
}
else if (obj==Bsave)
{
}
}

}

Answer 2

//-----------------------------------Sadd.java------------------------------
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Sadd extends StuM implements ActionListener
{
public void downInit()
{
Badd=new JButton("添加");
downPanel.add(Badd);
Badd.addActionListener(this);
BsetNull=new JButton("清空");
downPanel.add(BsetNull);
BsetNull.addActionListener(this);
Bexit=new JButton("退出");
downPanel.add(Bexit);
Bexit.addActionListener(this);
con.add(downPanel,BorderLayout.SOUTH);
}
public void ActionPerformed(ActionEvent e)
{
Object obj=e.getSource();
if (obj==Badd)
{
JOptionPane.showMessageDialog(null,"添加成功");
//Student student=new Student();
//student.addStu(Tsnum.getText(),Tsname.getText(),Tssex.getText(),Tsage.getText(),Tssch.getText(),Tsgra.getText(),Tsmaj.getText(),Tsdor.getText(),Tshome.getText()); }
}
public static void main(String args[])
{
Sadd addStudent=new Sadd();
addStudent.topInit();
addStudent.downInit();
addStudent.pack();
addStudent.setVisible(true);
}
}

Answer 3

小代码？SUN 09年的新产品？

Answer 4

Sadd.java中的public void ActionPerformed(ActionEvent e) 这句错了,
改为public void actionPerformed(ActionEvent e)