Any other way to add scrollbar to JPanel other than JscrollPane

Question

I have developed a desktop application. Now in that app I want to add panel with a scrollbar. I am trying using JScrollPane, but its not working.

JPanel paraJPanel = new JPanel();
JScrollPane SP_para_list = new JScrollPane(paraJPanel);
add(SP_para_list).setBounds(10,30,250,350); 

This way I am adding scrollbars to panel. But it shows only empty panel with borders. It is not showing components in the panel. Although I have added several labels in it. Is it correct? Is there any other way to add scroll bar to panel.

Thanks in advance

Answer 1

You need to set the PreferredSize for the panel, to make the scrollbar show up, like below.

even you do not set a layout, the panel already has a default layout set.

public static void main(String[] args)
{
    JFrame frame = new JFrame();
    JPanel panel = new JPanel()
    {
        @Override
        public Dimension getPreferredSize() {
            return new Dimension(800, 1000);
        }
    };
    panel.add(new JLabel("Test1"));
    panel.add(new JLabel("Test2"));
    frame.getContentPane().add(new JScrollPane(panel), BorderLayout.CENTER);
    frame.setSize(600, 800);
    frame.setVisible(true);
}