How to make JTable both AutoResize and horizontall scrollable?

Question

I am putting a JTable into a JScrollPane

But When I set JTable Auto Resizeable, then it won't have horizontal scroll bar.

if I set AUTO_RESIZE_OFF, then the Jtable won't fill the width of its container when the column width is not big enough.

So how can I do this:

when the table is not wide enough, expand to fill its container width
when the table is wide enough, make it scrollable.

Thanks

score 43 · Accepted Answer · answered May 24 '11 at 01:48

You need to customize the behaviour of the Scrollable interface.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;

public class TableHorizontal extends JFrame
{
    public TableHorizontal()
    {
        final JTable table = new JTable(10, 5)
        {
            public boolean getScrollableTracksViewportWidth()
            {
                return getPreferredSize().width < getParent().getWidth();
            }
        };
        table.setAutoResizeMode( JTable.AUTO_RESIZE_OFF );
        final JScrollPane scrollPane = new JScrollPane( table );
        getContentPane().add( scrollPane );
    }

    public static void main(String[] args)
    {
        TableHorizontal frame = new TableHorizontal();
        frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
        frame.pack();
        frame.setSize(400, 300);
        frame.setVisible(true);
    }
}

The above code basically sizes the component at its preferred size or the viewport size, whichever is greater.

ahhh ... Row, your trick - should have guessed so much :-) But it's uncomplete, hampers resizing of columns, see http://stackoverflow.com/q/15499255/203657 — kleopatra, Mar 20 '13 at 14:03
@kleopatra, I learn as I answer more questions (and see other answers). See http://stackoverflow.com/questions/15234691/enabling-auto-resize-of-jtable-only-if-it-fit-viewport/15240806#15240806 for an updated approach. — camickr, Mar 20 '13 at 16:13

score 11 · Answer 2 · answered Jun 27 '12 at 22:11

If for some reason customising JTable is not an option (e.g. it might be created in third-party code), you can achieve the same result by setting it to toggle between two different JTable AUTO_RESIZE modes whenever the containing viewport is resized, e.g.:

jTable.getParent().addComponentListener(new ComponentAdapter() {
    @Override
    public void componentResized(final ComponentEvent e) {
        if (jTable.getPreferredSize().width < jTable.getParent().getWidth()) {
            jTable.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
        } else {
            jTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
        }
    }
});

Worked like a charm! Thank you for the simple solution. – Vova Oct 24 '15 at 10:46 — Vova, Oct 24 '15 at 10:46

score 2 · Answer 3 · edited Dec 19 '13 at 06:21

2

I found that all that is needed is to include

  table = new JTable(model);
  // this enables horizontal scroll bar
  table.setAutoResizeMode( JTable.AUTO_RESIZE_OFF );

and then when the required viewport width and height have been calculated, include

  frame.getContentPane().add(new JScrollPane(table))
  table.setPreferredScrollableViewportSize(new Dimension(width,height));

edited Dec 19 '13 at 06:21

Java Man

1,854
3
21
43

answered Sep 20 '13 at 11:59

Nick Thomas

21
1

score 0 · Answer 4 · answered May 24 '11 at 01:46

0

If you set the Layout of its container to BorderLayout with a BorderLayout.CENTER layout constraint, then the JTable will auto resize to fit its container.

If you want to make a component scrollable, you can wrap the JTable with a JScrollPane.

setLayout(new BorderLayout());
add(new JScrollPane(new JTable()), BorderLayout.CENTER);

answered May 24 '11 at 01:46

Mohamed Mansour

39,445
10
116
90

This only auto resizes for the width not height. How can I make it auto resize the height? – bbodenmiller Dec 05 '12 at 08:42

How to make JTable both AutoResize and horizontall scrollable?

4 Answers4

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