Why this doesn't work?

Question

package prueba2.pkg1;
import javax.swing.*;
/**
*
* I am trying to put a botton on a windows but the button is taking all the windows and not only a little space on it
*/
public class Prueba21 {
private int X;
private int Y;
public class Pestañas extends JFrame{
public Pestañas(){
super("new windows");
setSize(1920,1080);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
public class Botones extends JButton {
public Botones(int X,int Y){
setLayout(null);
setBounds(X,Y,100,30);
setVisible(true);
}

}

/**
* {}
*/
public static void main(String[] args) {
Prueba21 pr = new Prueba21();
Pestañas W1 = pr.new Pestañas();
Botones B1 = pr.new Botones(300,250);
W1.setVisible(true);
W1.add(B1);

}
}
\\edit: i am using NetBeans

Answer 1

add setLayout(null) to Pestañas

Answer 2

Gui is not supported in sololearn