JTable in JScrollPane auto resize refresh problem

Question

Hello,
I have a JTable in a JScrollPane. Number of rows is changing.
I'm using the following to auto-resize JScrollPane.
public Dimension getPreferredSize() {
              Dimension size = super.getPreferredSize();
              size.height -= getViewport().getPreferredSize().height;
              Component view = getViewport().getView();
              if(view != null)
              size.height += view.getPreferredSize().height;
              return size;
         }There is a JButton, which adds an empty row to the JTable. It all works fine, except the auto-resize when a new row is added. I want all rows of JTable to be visible, with no scrollbars present. I tried repaint(), revalidate(), addNotify(). What should I do?
Thanks.

Answer 1

Sure
DefaultTableModel dtm = new DefaultTableModel(vec, header);
          jt0 = new JTable(dtm);
          jt0.getTableHeader().setReorderingAllowed(false);
          jt0.setFont(new Font("Tahoma", Font.PLAIN, 12));
          jt0.getTableHeader().setFont(new java.awt.Font("Tahoma", java.awt.Font.BOLD, 12));
          jt0.setRowHeight(18);
        jt0.setPreferredScrollableViewportSize(new Dimension(500, jt0.getRowCount() * jt0.getRowHeight()));
        jt0.setFillsViewportHeight(false);
          jsp0 = new JScrollPane(jt0);
GridBagConstraints gbc = new GridBagConstraints(); 
        gbc.insets = new Insets(2,1,2,1); 
        gbc.weightx = 1.0; 
        gbc.weighty = 1.0; 
        JPanel p0 = new JPanel(new GridBagLayout()); 
        gbc.fill = gbc.HORIZONTAL;
        p0.add(jsp0, gbc);
          JButton jb1 = new JButton("add row");
          jb1.setSize(40, 18);
jb1.addActionListener(new java.awt.event.ActionListener() {
               public void actionPerformed(java.awt.event.ActionEvent e) {
                    dtm.addRow(new Object[]{....});
//                    jt0.scrollRectToVisible(jt0.getCellRect(jt0.getModel().getRowCount()-1, 1, false));
//                    jt0.setRowSelectionInterval(jt0.getModel().getRowCount()-1, jt0.getModel().getRowCount()-1);
    public class SizeX extends JScrollPane {
         public Dimension getPreferredSize() {
              Dimension size = super.getPreferredSize();
              size.height -= getViewport().getPreferredSize().height;
              Component view = getViewport().getView();
              if(view != null)
              size.height += view.getPreferredSize().height;
              return size;
    }