ActionEvent won't appear

I have a problem in my program. Here's my code:

import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener;

public class click_rep extends JFrame{

public click_rep(){

    super("CLICK");
    final JButton btn1 = new JButton("CLICK HERE");
    final JLabel label = new JLabel();
    FlowLayout flo = new FlowLayout();
    setLayout(flo);
    add(btn1);
    setSize(315,120);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setVisible(true);

    btn1.addActionListener(new ActionListener(){

        public void actionPerformed(ActionEvent e){
            try{
                String command = e.getActionCommand();
                if (command.equals(btn1)){
                    label.setText("CLICK");
                    setVisible(true);
                }
            }catch(Exception e1){
                e1.printStackTrace();
            }

        }


    });

}

public static void main(String[] a){
    click_rep cp = new click_rep();
}

}

My problem is that the ActionEvent won't appear. What will I do to make the ActionEvent appear? Hopefully someone can help me. Thanks for the help.