给段代码，actionPerformed（）里面有问题，为什么点jb2没反应

public class FrameUI extends JFrame implements ActionListener
{
private JTextField jtext;
private JButton jb;
private JButton jb2;

public FrameUI()
{
    this.setLayout(new FlowLayout(FlowLayout.CENTER, 2, 2));
    this.setBounds(500,300,350,70);
    this.jtext = new JTextField("                                                                 ");
    this.setTitle("审核");
    this.add(jtext);
    //jfc = new JFileChooser();
    this.jb=new JButton("路径");
    this.jb2=new JButton("报告");
    this.add(jb);
    this.add(jb2);
    this.jb.addActionListener(this);
    this.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
    if(e.getSource()==this.jb2)
    {
        //Chooser ch=new Chooser();
        //this.jtext.setText(ch.getPath());
        System.out.print("jb2")
    }else if(e.getSource()==this.jb)
    {
        //审核报告
        System.out.println("jb1");
    }
}
public static void main(String args[])
{
    FrameUI a=new FrameUI();
}

}

this.jb.addActionListener(this);

jb2又没添加这个监听器 当然不会执行了