How to make the button icon occupy the entire area of ​​the button (fill the button)?

Question

Java

How to make it so that the Icon (picture) of the button Occupies the entire area of ​​the button (filled the button) while not increasing the size of the Button on the Frame, and when the Window is resized, it changes size, but does not stop occupying the entire area of ​​the button?

//Создаю кнопку
        my_btn= new JButton();
        my_btn.setAlignmentY(0.0f);
        my_btn.setFont(new Font("Georgia", my_btn.getFont().getStyle(), 20));
        my_btn.setLabel("Колонка 1");
        my_btn.setMargin(new Insets(0, 0, 0, 0));
        my_btn.setPreferredSize(new Dimension(1, 1));
        my_btn.setText("Колонка 1");
//В другом методе добавляю ей иконку(картинку)
try {
    Image img = ImageIO.read(getClass().getResource("image.png"));
    my_btn.setIcon(new ImageIcon(img));
    my_btn.setText(null);
} catch (IOException ex) {
}