Posted Tuesday, September 14, 2010 @ 13:15:40  

TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(dbtable.getTable().getModel());
dbtable.getTable().setRowSorter(sorter);
sorter.setComparator(0, new MyStringSorter());
sorter.setComparator(1, new MyIntegerSorter());
...

The problem here: the Tablemodel although ZERO-based has no entries in Column zero (only NULLs).

A solution would be:

sorter.setComparator(1, new MyStringSorter());
sorter.setComparator(2, new MyIntegerSorter());
...

But then the last column

sorter.setComparator(dbtable.getColumnCount(), new MyDoubleSorter());

throws the Exception:
Exception in thread "AWT-EventQueue-0" java.lang.IndexOutOfBoundsException: column beyond range of TableModel
at javax.swing.DefaultRowSorter.checkColumn(Unknown Source)
...