Need help with Jframe. We are writing the first small program

So I started writing a small program for calculating bonuses. Now I'm faced with the problem of creating objects in the second window. It is necessary to create objects at the top (possibly labels, maybe a single table) from which I can take data. Now, when we click on the “Add” button, we create a label, and I can’t imagine how to rip out the text of the label (for example, the text of the 2nd label, if after it I have already created a 3rd label). Ideally: create a table. Take the number from the second line of the second column and write it in the name of the button. Please help a beginner java programmer. Well, in general, maybe this is all being created differently? import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.HashMap; import java.util.Iterator; import java.util.Map; public class Interface { public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new Interface(); } }); } Interface() { //ОСНОВНОЕ ОКНО//////////////////////////////////////////////////// JFrame frame = new JFrame("Основное окно"); frame.setSize(240, 500); frame.setResizable(false); frame.setLocation(0/*(int) screenSize().getHeight() * 1/ 100*/, (int) screenSize().getWidth() * 25 / 100); frame.setLayout(new BorderLayout()); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); frame.setVisible(true); //ПАНЕЛЬ JPanel jpn = new JPanel(); JLabel lbl = new JLabel("Первая прога"); jpn.add(lbl); //ПАНЕЛЬ 2 JPanel jpn2 = new JPanel(); JLabel lbl2 = new JLabel("Текущий бонус: "); JButton btn = new JButton("0"); jpn2.add(lbl2); jpn2.add(btn); //ДОБАВЛЕНИЕ ПАНЕЛЕЙ frame.add(jpn, BorderLayout.NORTH); frame.add(jpn2, BorderLayout.CENTER); //ОКНО БОНУСОВ////////////////////////////////////////////////////// JFrame secondFrame = new JFrame("Окно бонусов"); secondFrame.setSize(250, 300); secondFrame.setResizable(false); secondFrame.setLocationRelativeTo(null); secondFrame.setLayout(new BorderLayout()); secondFrame.setUndecorated(false); //ПАНЕЛЬ 1 JPanel jppF1 = new JPanel(new GridLayout(3, 2, 3, 5)); //ПАНЕЛЬ 2 JPanel jppF2 = new JPanel(new GridLayout(5, 2)); JLabel lblpF3 = new JLabel("Тип an object"); jppF2.add(lblpF3); String[] getUnitNames = {"Тип1","Тип2","Тип3","Тип4","Тип5"}; JComboBox jcbpF = new JComboBox<>(getUnitNames); jppF2.add(jcbpF); JLabel lblpF4 = new JLabel("Количество"); jppF2.add(lblpF4); JTextField tfpF = new JTextField(15); jppF2.add(tfpF); jppF2.add(new JLabel()); JButton btnpF = new JButton("Добавить"); jppF2.add(btnpF); //ДОБАВЛЕНИЕ ПАНЕЛЕЙ secondFrame.add(jppF1, BorderLayout.NORTH); secondFrame.add(jppF2, BorderLayout.SOUTH); ///////////////К Н О П К И //////////////////////////////////////////// btn.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { if (!secondFrame.isVisible()) { secondFrame.setVisible(true); } } }); btnpF.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { JLabel lblpF1 = new JLabel(""); if (lblpF1.getText().equals(jcbpF.getSelectedItem())) { lblpF1.setText("asdasdas"); } else { jppF1.add(lblpF1); lblpF1.setText("" + jcbpF.getSelectedItem() + " (" + tfpF.getText() + ")"); new GroupLayout(jppF1); jppF1.setLayout(new GridLayout(3, 2, 3, 5)); } } }); /////////////////////////////////////////////////////////////////////// } private static Dimension screenSize() { Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); return screenSize; } private static Integer typeCost(HashMap map, String z) { int q = 0; Iterator > qqe = map.entrySet().iterator(); while (qqe.hasNext()) { Map.Entry para = qqe.next(); if (para.getKey().equals(z)) q = para.getValue(); } return q; } }