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How can I automatically sort a Jtable by a specific column within code, and still allow the user to (later) sort any column by clicking on the specific table header.

Thanks,

On 9/12/2012 9:25 AM, wrote:
> How can I automatically sort a Jtable by a specific column within
> code, and still allow the user to (later) sort any column by clicking
> on the specific table header.

It does not work changing the data in the data model behind the
JTable?

Arne

In article <114c9b7c-7ed8-4f59-aa46->,
wrote:

> How can I automatically sort a JTable by a specific column within
> code, and still allow the user to (later) sort any column by clicking
> on the specific table header.

Have you looked at Sorting and Filtering?

<http://docs.oracle.com/javase/tutorial/uiswing/components/table.html#sorting>

You can restore your TableModel's intrinsic order as shown here:

<http://stackoverflow.com/a/5484298/230513>

--
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>

John B. Matthews wrote:
> Have you looked at Sorting and Filtering?
> <http://docs.oracle.com/javase/tutorial/uiswing/components/table.html#sorting>

Oh, I like that site. Thank you.

> You can restore your TableModel's intrinsic order as shown here:
> <http://stackoverflow.com/a/5484298/230513>

I'd like to know your preference regarding the tutorial example

<http://docs.oracle.com/javase/tutorial/displayCode.html?code=http://docs.oracle.com/javase/tutorial/uiswing/examples/components/TableSortDemoProject/src/components/TableSortDemo.java>

(and ain't the "tutorial/displayCode.html" cool, huh?)

Do you prefer

public class TableSortDemo extends JPanel {
public TableSortDemo() {
super(new GridLayout(1,0));

as they do it, or

public class TableSortDemo {
JPanel sorterPanel = new JPanel(new GridLayout(1,0));

etc.?

Also,

public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}

'Class<?>' or don't bother?

--
Lew

I've solved this problem. Do you want the details.

On Thursday, September 13, 2012 1:59:01 AM UTC-4, (unknown) wrote:
> I've solved this problem. Do you want the details.

http://www.java.net/node/698343

RowSorter sorter = getRowSorter();
List sortKeys = new ArrayList();
sortKeys.add(new RowSorter.SortKey(0, SortOrder.ASCENDING));
sorter.setSortKeys(sortKeys);

Thanks,

In article <f8e3b99f-0790-4d51-a25d->,
Lew <> wrote:

> John B. Matthews wrote:
>> Have you looked at Sorting and Filtering?
>> <http://docs.oracle.com/javase/tutorial/uiswing/components/table.html#sorting>
>
> Oh, I like that site. Thank you.

You are welcome. Many articles saw updates during the run-up to the
Java 7 roll-out. It's also an appealing example of integrating Java Web
Start.

> > You can restore your TableModel's intrinsic order as shown here:
> > <http://stackoverflow.com/a/5484298/230513>
>
> I'd like to know your preference regarding the tutorial example
>
> <http://docs.oracle.com/javase/tutori...tp://docs.orac
> le.com/javase/tutorial/uiswing/examples/components/TableSortDemoProject/src/co
> mponents/TableSortDemo.java>
>
> (and ain't the "tutorial/displayCode.html" cool, huh?)

Yes, although it took me a while to understand the "Download" link.

> Do you prefer
>
> public class TableSortDemo extends JPanel {
> public TableSortDemo() {
> super(new GridLayout(1,0));
>
> as they do it, or
>
> public class TableSortDemo {
> JPanel sorterPanel = new JPanel(new GridLayout(1,0));
>
> etc.?

Ideally, I try to follow Joshua Bloch, Effective Java, 2nd edition:

Item 16: Favor composition over inheritance

Practically, a JPanel is a convenient unit of containment and a handy
rendering surface, so I may honor item 16 more in the breach than the
observance. I can't fault other weaknesses in the tutorial too much;
the particular example cited predates annotations and generics, both
introduced in Java 5.

Item 17: Design and document for inheritance or else prohibit it.

The parent, JComponent, is a good example of the former. JPanel adds
very little: opacity, a default layout and a UI delegate.

> Also,
>
> public Class getColumnClass(int c) {
> return getValueAt(0, c).getClass();
> }
>
> 'Class<?>' or don't bother?

Citing the same source, Item 23, the unbounded wildcard type Class<?>
"is safe and the raw type isn't." Checking 22 Java 1.5+ examples, I've
(carelessly) used the raw type twice.

--
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>