Add Scrollbar to jframe java

Add Scrollbar to jframe java

Trying to add Scrollbar when, it needed on jframe, I tried:
JScrollPane sp = new JScrollPane(panel);
this, And its working but my button move to right, Button should be end,
not or right, Please help me!! Thanks in advanced!! Here is my code,
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class searchcustnumer1_08062013 {
public static void main(String[] args) throws IOException {
final JFrame frame = new JFrame("Scan Here: ");
JPanel panel = new JPanel();
JScrollPane sp = new JScrollPane(panel);
final JTextArea text = new JTextArea(20, 40);
frame.getContentPane().add(sp);
frame.add(sp);
JButton button = new JButton("Enter");
panel.add(text);
panel.add(button);
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
}
}
}
Please help me!! Thanks!!