Adding data dynamically to JTable with a filter - getting error

Question

Hello,
I am using JTable, and adding data and displaying it worked fine
until I tried adding a filter,
can anyone tell me what am I doing wrong or
why am I getting this Error?
The Error message
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at javax.swing.DefaultRowSorter.convertRowIndexToModel(DefaultRowSorter.java:501)
        at javax.swing.JTable.convertRowIndexToModel(JTable.java:2620)
        at javax.swing.JTable.getValueAt(JTable.java:2695)
        at javax.swing.JTable.prepareRenderer(JTable.java:5712)
        at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2075)
        at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1977)
        at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1773)
        at javax.swing.plaf.ComponentUI.update(ComponentUI.java:143)
        at javax.swing.JComponent.paintComponent(JComponent.java:763)
        at javax.swing.JComponent.paint(JComponent.java:1027)
        at javax.swing.JComponent.paintChildren(JComponent.java:864)
        at javax.swing.JComponent.paint(JComponent.java:1036)
        at javax.swing.JViewport.paint(JViewport.java:747)
        at javax.swing.JComponent.paintChildren(JComponent.java:864)
        at javax.swing.JComponent.paint(JComponent.java:1036)
        at javax.swing.JComponent.paintToOffscreen(JComponent.java:5122)
        at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:277)
        at javax.swing.RepaintManager.paint(RepaintManager.java:1217)
        at javax.swing.JComponent._paintImmediately(JComponent.java:5070)
        at javax.swing.JComponent.paintImmediately(JComponent.java:4880)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:803)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:714)
        at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:694)
        at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:128)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)I am also using my own class that extends "AbstractTableModel"
as TableModel,
public class MyTableModel extends AbstractTableModel  {
    ArrayList<TableData> tableData=new ArrayList<TableData>(10);
    String[] columnNames=new String[]{"S/N"," Time (mili)","SD","SA","SSAP","DA","DSAP","FC","DATA"};   
    public void addRow(TableData data){
        tableData.add(data);
        fireTableDataChanged();
    @Override
    public int getRowCount() {
        return tableData.size();
    public TableData getRow(int i){
        return tableData.get(i);
    @Override
    public int getColumnCount() {
        return columnNames.length;
    @Override
    public String getColumnName(int col) {
            return columnNames[col];
    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        return tableData.get(rowIndex).getValue(columnIndex);
    }The Row Filter class
class myRowFilter extends RowFilter<MyTableModel,Integer>{
        @Override
        public boolean include(Entry<? extends MyTableModel, ? extends Integer> entry) {
            // Entry < SomeCostumTableModel , Integer> entry   ; Integer =Identifier= Row Number
            boolean frame_type;
            MyTableModel model=entry.getModel();
            TableData data=model.getRow(entry.getIdentifier());
            frame_type=((SD1&&data.SD==TableData.SD1) ||
                                         (SD2&&data.SD==TableData.SD2) ||
                                         (SD3&&data.SD==TableData.SD3) ||
                                         (SD4&&data.SD==TableData.SD4) ||
                                         (SC&&data.SD==TableData.SC) );
           return frame_type;
    }and How I add the filter to the Table
    private MyTableModel myTableModel=new MyTableModel();
    private RowSelectionListener rowSelectionListener=new RowSelectionListener();
    TableRowSorter<MyTableModel> sorter=new TableRowSorter<MyTableModel>(myTableModel);
    private FilterFrame filterFrame=new FilterFrame(this);
    // then in the constructor of the main frame
    // I call this
        sorter.setRowFilter(filterFrame.filter);
        MainTable.setRowSorter(sorter);
        sorter.setSortsOnUpdates(true);Edited by: YellowMurdoch on Nov 17, 2009 6:31 AM
Edited by: YellowMurdoch on Nov 17, 2009 6:31 AM

Answer 1

Thanks for noting that.
you mean like this?
public void addEntry(TableData data){
        myTableModel.addRow(data);
        javax.swing.SwingUtilities.invokeLater(new Runnable(){
            @Override
            public void run(){
                    myTableModel.fireTableRowsInserted(0,0);
    }both work,
would putting "invokeLater" inside "addEntry" somehow mess other things?
i guess that means addRow() is not supposed to update the table graphically?
Edited by: YellowMurdoch on Nov 17, 2009 9:30 AM
Edited by: YellowMurdoch on Nov 17, 2009 9:33 AM