JTable按日期排序

Question

I have a JTable with two columns, fileName and date modified . I have added name String for the first column and added new Date(tempFile.lastModified()) for the second dateTime column.

I rendered the dateTime column as a new SimpleDateFormat("MM/dd/yy HH:mm:ss") String.

I also enabled the m_listTbl.setAutoCreateRowSorter(true);

But the sort result in the date modified column is not right.

Why is this? Do I still need to write my own sorter?

EDIT:

After commented out almost all extra code and not rendered by date String, I got the following result. It seems in JTable Java sort Date object by day by default. I will test more to see what's wrong with my code.

EDIT2

I have tested and figured out. If you use DefaultTableModel without overriding its getColumnClass() method, you will have trouble with Date or Number columns.

Answer 1

EDIT2 : Absolutely. Having the same problem in a jtable linked to a tablemodel I can confirm that the problem is due to the class associated to the column value (EDIT2) in the tableModel . Surprise was that Date column was of class Object no matter a perfect type Date was returned in my subclass of DefaultTableModel when overriding public Object getValueAt(int row, int col) .

Workaround is to override getColumnClass in your subclass of DefaultTableModel . If you don't do that, sorting is done on Object for Dates with strange results when you sort the Date column.