ListTableModel NullPointerException exactly, example

amy

Hi all.
I'm new user of Spring RCP and i try to used ListTableModel.

I have implemented exactly the example of the wiki. Like this:Code:       List rows = new ArrayList();       rows.add(Arrays.asList(quot;000001quot;, quot;Applequot;));       rows.add(Arrays.asList(quot;000002quot;, quot;Sunquot;));       rows.add(Arrays.asList(quot;000002quot;, quot;IBMquot;));
       ListTableModel tableModel = new ListTableModel(rows) {
protected Class[] createColumnClasses() {    return new Class[]{String.class, String.class};}
protected String[] createColumnNames() {    return new String[]{quot;Numberquot;, quot;Namequot;};}       };
       JTable jTableLeftUp =    TableUtils.createStandardSortableTable(tableModel);
And when i access to my view, i have a null Pointer execption.Code:
java.lang.IllegalStateException: Application start thrown an exception: null       at org..richclient.application.ApplicationLauncher.launchMyRichClient(ApplicationLauncher.java:316)       at org..richclient.application.ApplicationLauncher.lt;initgt;(ApplicationLauncher.java:159)       at fr.jcronload.SimpleApp.main(SimpleApp.java:77)
Caused by: java.lang.NullPointerException       at org..richclient.table.BaseTableModel.getColumnCount(BaseTableModel.java:152)
Here's a little of my POM configuration.

Code:   lt;propertiesgt;       lt;springrich.versiongt;1.0.0lt;/springrich.versiongt;       lt;spring.versiongt;2.5.1lt;/spring.versiongt;   lt;/propertiesgt;   ...       lt;dependencygt;lt;groupIdgt;org..richclientlt;/groupIdgt;lt;artifactIdgt;spring-richclient-supportlt;/artifactIdgt;lt;versiongt;${springrich.version}lt;/versiongt;       lt;/dependencygt;   ...
Thanks.

If you look closely to the code of BaseTableModel, you'll soon find out why:Code:
public int getColumnCount() {       return columnNames.length;   }
columnNames is filled when calling createColumnInfo(), which in turn is only called upon by setRowNumbers(boolean).

So you can do one of the following:

1) create a subclass of ListTableModel, which exposes createColumnInfo(), and call this method after creating the ListTableModel (it's standard protected)

2) override the method getColumnCount();

3) call setRowNumbers(false)

Kind regards,

Lieven

Thanks for quick and quality answer.

Its works perfect with solution 3.

Regards,