Delete rows from JTable

Question

Hello
I use a JTable with a custom table model that extends javax.swing.table.DefaultTableModel.
I haven't overwrote the method
public void removeRow(int row)Now when i use this method the rows always get removed from the end. It doesn't matter which value the parameter row has.
Even when i call
myTableModel.removeRow( 0 );it removes the rows at the end of the table.
It would be nice if someone could help me with this.
Regards, Michelle

Answer 1

It's not so easy to do this because it's a big project, but here is the code of the table model.
import javax.swing.table.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import java.util.*;
public class AssignmentsTableModel2 extends DefaultTableModel implements TableModelListener
     static final long serialVersionUID = 41L;
     public AssignmentsTableModel2(String[][] arg1, String[] arg2)
          super(arg1, arg2);
     public Vector getColumnIdentifiers()
          return columnIdentifiers;
     @Override
     public int getColumnCount()
          return this.columnIdentifiers.size();
     @Override
     public int getRowCount()
          return this.dataVector.size();
     @Override
     public String getColumnName(int col)
        return (String)this.columnIdentifiers.elementAt( col );
     @Override
     public Object getValueAt(int rowIndex, int columnIndex)
          return ((Vector)this.dataVector.elementAt( rowIndex )).elementAt( columnIndex );
     @Override
     public void setValueAt( Object val, int rowIndex, int columnIndex )
          ((Vector)this.dataVector.elementAt( rowIndex )).set( columnIndex, val);
          fireTableCellUpdated( rowIndex, columnIndex );
     @Override
     public void tableChanged(TableModelEvent e)
     @Override
     public void setColumnIdentifiers(Vector columnIdentifiers)
          super.setColumnIdentifiers(columnIdentifiers);
     @Override
     public void removeRow(int row)
          this.dataVector.remove(row);
          System.out.println(row + " to remove");
          this.fireTableStructureChanged();
          //super.removeRow(row);
}I need the model to change the background color of the cells at runtime and I now overwrote the removeRow() method, but it's still the same problem.
Also I have a custom JTable class that colours the TableHeader of the selected column.
class PaintedTable extends JTable {
    private static final long serialVersionUID = 1L;
    PaintedTable(AssignmentsTableModel2 atm)
        super(atm);
        setOpaque(false);
        ((JComponent) getDefaultRenderer(Object.class)).setOpaque(false);
    @Override
    public void paintComponent(Graphics g)
         //System.out.println("paint table");
        Color background = new Color(168, 210, 241);
        Color controlColor = new Color(230, 240, 230);
        int width = getWidth();
        int height = getHeight();
        Graphics2D g2 = (Graphics2D) g;
        Paint oldPaint = g2.getPaint();
        g2.setPaint(new GradientPaint(0, 0, background, width, 0, controlColor));
        g2.fillRect(0, 0, width, height);
        g2.setPaint(oldPaint);
        for (int row : getSelectedRows())
            Rectangle start = getCellRect(row, 0, true);
            Rectangle end = getCellRect(row, getColumnCount() - 1, true);
            g2.setPaint(new GradientPaint(start.x, 0, Color.orange, (int) ((end.x + end.width - start.x) * 1.25), 0, controlColor));
            g2.fillRect(start.x, start.y, end.x + end.width - start.x, start.height);
            //System.out.println("rect: (" + start.x + ", " + start.y + ") + (" + (end.x + end.width - start.x) + ", " + start.height +")");
        super.paintComponent(g);
    public boolean isCellEditable(int rowIndex, int colIndex)
        return false;  
AssignmentsTableModel2 atm = new AssignmentsTableModel2(this.columnValues, this.columnHeaders);     
PaintedTable table = new PaintedTable( this.atm );