CODEWITHSUNDEEP
javaswingjtablecomparatortablerowsorter
user1639485
user1639485

Reputation: 808

JTable rows sorting without changing the "Sl No" column

In my JTable, among other columns, I have a "Serial No" column which simply numbers the records in the table. I want this column to be fixed while I sort the rows by clicking on the JTable column headers. The sorting is happening alright, but the "Serial No" is getting mixed up in the process. Is there any way I could keep the "Serial No." column fixed while I sort the rows?

Thanks for your help on this.

Example:

SlNo Name
1 John
2 Peter
3 Alek

After sorting this by (clicking on 'Name' column), I get this:

SlNo Name
3 Alek
1 John
2 Peter

However, I would like the results as:

SlNo Name
1 Alek
2 John
3 Peter

Upvotes: 0

Views: 896

Answers (2)

Dan
Dan

Reputation: 7734

A really simple implementation of this would be 

public class siNo implements RowSorterListener {
    JTable table;
    public siNo(JTable table) {
        this.table = table;
    }

    @Override
    public void sorterChanged(RowSorterEvent e)
    {
        for (int i = 0; i < table.getRowCount(); i++) {
            table.setValueAt(Integer.toString(i+1), i, 0);
        }
    }
}

Your class which contains table

sorter.setSortable(0, false);
sorter.addRowSorterListener(new siNo());

Upvotes: 0

MadProgrammer
MadProgrammer

Reputation: 347314

Have you tried implementing your own TableRowSorter?

Have a look at Sorting and Filtering

UPDATE

I've been digging around the code checking this out. It is doable, but you're going to have to reinvent the wheel to get it to work.

The default implementation simply compares row/column values together (getValueAt(row, column)) which is fine, but doesn't provide you with any context in order to make the decisions you need to make (ie, which row is been sorted, what the row value might be etc.), in fact the filter provides much more valuable information :P...

The method you really wan to override is private...(DefaultRowSorter.compare), but I'm not sure it will do what you want any way...

The only solution you have left is to implement you're solution from scratch (starting from RowSorter) that is capable of providing you with ALL the information you need in order to perform sub group sorting. Things like the table model, the row and columns been compared...

Upvotes: 1

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