JTable in JScrollPane, preferred size

Question

When I put a JTable in a JScrollPane, the JScrollPane seems to want to be very big. How does the scroll pane determine its size? run this code for an example..
import javax.swing.*;
public class TestPanel extends JPanel
public TestPanel()
     add(new JScrollPane(new JTable(1,1)));
public static void main(String args[])
     JFrame f = new JFrame("big table test");
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     TestPanel thePanel = new TestPanel();
     f.setContentPane(thePanel);
     f.pack();
     f.show();

Answer 1

public class TestPanel extends JPanel {
  public TestPanel() {
    JTable jt = new JTable(1,1);
    jt.setPreferredScrollableViewportSize(new Dimension(100,100));  // Do this
    JScrollPane jsp = new JScrollPane(jt);
    jsp.setPreferredSize(new Dimension(100,100));  //OR this
    add(new JScrollPane(new JTable(1,1)));
}