How to add element to jlist and then how to add that jlist to jscrollpane...?

// java Program to create a simple JList
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import java.io.*;

class cp extends JFrame
{
    //main class
    public static void main(String[] args)
    {
        //create a new frame
        cp cpFrame = new cp();
        cpFrame.setData();
    }

    private void setData() {
        //set the size of frame
        this.setSize(400,400);
        //create a panel
        JPanel panel =new JPanel();
         
        //create list
        JList list = null;
        
        // for(File fr:fp.listFiles()) //  ***** I am not sure what all these files are supposed to be
		{
			// if(fr.getName().equals(fq.getName()))
			{
                list = getList(new File("cp.txt"));
            }
        }         
        //add list to panel
        if (list != null) {
            int v = ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;
            int h = ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
            list.setLayoutOrientation(JList.VERTICAL);
            JScrollPane jsp6 = new JScrollPane(list, v, h);
            this.add(jsp6);
        }
          
        this.show();
    }

    private JList getList(File fr) {
        String gg="    ";
        DefaultListModel<String> model3=new DefaultListModel<>();
        try
        {
            FileReader fread=new FileReader(fr);
            BufferedReader bread=new BufferedReader(fread);
            String line=bread.readLine(); // ***** this code processes only the first line of the file
            char []po=line.toCharArray();
            int ih=0;
            int pop=0;
            int v=ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;
            int h=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
            JList<String> kl;		
            for(ih = 0; ih < line.length(); ih++)
            {
                //JOptionPane.showMessageDialog(null,po[ih]);
                gg="    ";
                while(po[ih] != '.')
                {
                    gg +=po[ih];
                    ih++;
                }
                model3.addElement(gg);
                gg="    ";
            }
            kl=new JList<>(model3);
            return kl;
        }
        catch(Exception e)
        {
            System.out.println(e.getMessage());	
        }
        return null;
    }

}