How to add Panel in JScrollPane? URGENT!

Question

I need to add a Panel in JScrollPane
I have try to add JPanel into JScrollPane, but apparently, the JPanel did not show up at all in the JScrollPane (all i see is the border of JScrollPane)
Then I switch my JPanel to Panel (awt) and it does appear on the JScrollPane, but scrollbars are not visible even i have set the size of the panel is larger than the JScrollPane. (and i also set the VERTICAL_SCROLLBARS_ALWAYS) I can scroll with my mousewhieel, but the panel can scroll out of place(ie outside of the Jscrollpane)
Can someone teach me how to add a Panel or JPanel to a JScrollPane Please~ Thanks!!!

Answer 1

here is an example that illustrate my problem:
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.filechooser.*;
public class testing extends JFrame
     public testing()
          Container pane=getContentPane();
          pane.setLayout(null);
          setSize(600,600);
          JPanel backgroundpanel= new JPanel();
          backgroundpanel.setLayout(null);
          backgroundpanel.setSize(500,500);
          backgroundpanel.setLocation(0,0);
          Panel insidepanel = new Panel();
          insidepanel.setLayout(null);
          insidepanel.setSize(300,300);
          insidepanel.setLocation(0,0);
          JLabel something= new JLabel("something");
          JTextField someTF= new JTextField(10);
          something.setSize(100,20);
          something.setLocation (20,20);
          someTF.setSize(100,20);
          someTF.setLocation(50,60);
          insidepanel.add(something);
          insidepanel.add(someTF);
          JScrollPane scrollpane= new JScrollPane(insidepanel, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS );
          scrollpane.setSize(200,200);
          scrollpane.setLocation(10,10);
          backgroundpanel.add(scrollpane);
          pane.add(backgroundpanel);
          setVisible(true);
          setDefaultCloseOperation(EXIT_ON_CLOSE);
     public static void main(String args[]) throws FileNotFoundException, IOException
                    testing test=new testing();
apparently, the panel i add in teh scrollpane is on the top layer instead of inside the scroll... can anyone help?