Mam następujący kod źródłowy ... Czy ktoś może mi doradzić, jak dodać jscrollpane do jframe? Próbowałem kilka razy dodać go do jframe, ale bez żadnego postępu. Nawet się nie pokazuje.

public class Form3 {
        JFrame jframe = new JFrame("Etiket print.");
        JPanel panel1 = new JPanel();
        JPanel panel2 = new JPanel();
        JPanel panel3 = new JPanel();
        JPanel panel4 = new JPanel();
        JScrollPane scrollFrame = new JScrollPane(panel2);
        Color myBlue1Color = new Color(168, 175, 247);
        Color myBlue2Color = new Color(139, 146, 255);



           public Form3(){
                jframe.setMinimumSize(new Dimension(1280, 1000));
                panel2.setLayout(new BoxLayout(panel2, BoxLayout.Y_AXIS));
                panel2.setAutoscrolls(true);
                jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                //---------------------------------Header
                panel1 = createSquareJPanel(Color.YELLOW, 600,200);
                panel3 = createSquareJPanel(Color.GREEN, 400,200);
                panel4 = createSquareJPanel(Color.white, 280,200);
                JPanel container = new JPanel();
                JPanel container1 = new JPanel();
                JPanel container2 = new JPanel();
                container.setLayout(new BoxLayout(container, BoxLayout.Y_AXIS));
                container1.setLayout(new BoxLayout(container1, BoxLayout.Y_AXIS));
                container2.setLayout(new BoxLayout(container2, BoxLayout.X_AXIS));


                container1.add(panel1);
                container2.add(container1);
                container2.add(panel3);
                container2.add(panel4);
                container.add(container2);
                container.add(panel2);

                {

                    for (int i=0; i<25; i++){

                        JPanel harnessPanel= new JPanel();
                        harnessPanel.setMinimumSize(new Dimension(1280, 70));
                        harnessPanel.setMaximumSize(new Dimension(1280, 70));
                        harnessPanel.setPreferredSize(new Dimension(1280, 70));
                        if(i%2==0) {
                            harnessPanel.setBackground(myBlue1Color);
                        }
                        else {
                            harnessPanel.setBackground(myBlue2Color);
                        }
                        panel2.add(harnessPanel);

                        harnessPanel.repaint();
                        harnessPanel.validate();
                    }
                    panel2.repaint();
                    panel2.validate();
                }
                jframe.add(scrollFrame);
                jframe.add(container);

                jframe.pack();
                jframe.setLocationRelativeTo(null);
                jframe.setVisible(true);

            }

            private JPanel createSquareJPanel(Color color, int size1, int size2)
            {
                JPanel tempPanel = new JPanel();
                tempPanel.setBackground(color);
                tempPanel.setMinimumSize(new Dimension(size1, size2));
                tempPanel.setMaximumSize(new Dimension(size1, size2));
                tempPanel.setPreferredSize(new Dimension(size1, size2));
                return tempPanel;
            }

            public static void main (String args[]){
                SwingUtilities.invokeLater(new Runnable() {
                    @Override
                    public void run() {
                        Form3 myF=new Form3();

                    }
                });
            };
        }

zdjęcie mojej aplikacji:

rzeczywisty stan: