el boton y la madre

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import java.awt.*;
import javax.swing.*;

public class BorderExample{
    private JFrame  f;
    private JButton bn,bs,bw,be,bc;
    public BorderExample() {
        f= new JFrame ("Border Layout");
        bn= new JButton("Button 1");
        bc= new JButton("Button 2");
        bw= new JButton("Button 3");
        bs= new JButton("Button 4");
        be= new JButton("Button 5");
    }
    public void launchFrame(){
        f.add(bn, BorderLayout.NORTH);
        f.add(bs, BorderLayout.SOUTH);
        f.add(bw, BorderLayout.WEST);
        f.add(be, BorderLayout.EAST);
        f.add(bc, BorderLayout.CENTER);
        f.setSize(400,200);
        f.setVisible(true);
    f.setActionCommand("ButtonPressed");
    }

    public void buttonaction (){
    f.addActionListener(new ButtonHandler());
    f.add(b,Border

public static void main (String args[]){
    BorderExample guiWindow2 =new BorderExample();
    guiWindow2.launchFrame();
}
}