Thread: TableRowSorter throws Exception

Hi,

I created an application that use jtable to display 650 record from an excel file. And i added TableRowSorter for filtering and sorting the data. To use filtering i used jtextfield and jbutton, when the user write a keyword into a textfiled and press search button, it filters all rows and columns. This part works without any error. The code here:

else if( e.getActionCommand().equals("Search")){
 
            //selectionModel.clearSelection();
            String text = filterField.getText();
 
            if( text.trim().length() == 0) //if nothing entered to textfield return null
                sorter.setRowFilter(null);
            else
                sorter.setRowFilter(RowFilter.regexFilter("(?i)" + text)); // "(?i)" makes search case-insensitive 
        }

Than, i want to get selected data from selected row and specific column( column = 0 ). I think the problem occured because of this code. I used this:

public void valueChanged(ListSelectionEvent e) {
       selection = table.getValueAt(table.getSelectedRow(), 0);
}

After i added this code, it works normally until i select any row from the table. If i don't select any row, it do filtering. But if i select any row from the table it throws an exception, and not filtering.

The exception is :

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1
	at javax.swing.DefaultRowSorter.convertRowIndexToModel(DefaultRowSorter.java:501)
	at javax.swing.JTable.convertRowIndexToModel(JTable.java:2611)
	at javax.swing.JTable.getValueAt(JTable.java:2686)
	at deneme.valueChanged(deneme.java:299)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:147)
	at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:194)
	at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:388)
	at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:398)
	at javax.swing.DefaultListSelectionModel.removeSelectionIntervalImpl(DefaultListSelectionModel.java:559)
	at javax.swing.DefaultListSelectionModel.clearSelection(DefaultListSelectionModel.java:403)
	at javax.swing.JTable$SortManager.restoreSelection(JTable.java:4017)
	at javax.swing.JTable$SortManager.processChange(JTable.java:3985)
	at javax.swing.JTable.sortedTableChanged(JTable.java:4117)
	at javax.swing.JTable.sorterChanged(JTable.java:3807)
	at javax.swing.RowSorter.fireRowSorterChanged(RowSorter.java:323)
	at javax.swing.RowSorter.fireRowSorterChanged(RowSorter.java:315)
	at javax.swing.DefaultRowSorter.sort(DefaultRowSorter.java:595)
	at javax.swing.DefaultRowSorter.setRowFilter(DefaultRowSorter.java:407)
	at deneme.actionPerformed(deneme.java:337)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
	at java.awt.Component.processMouseEvent(Component.java:6288)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
	at java.awt.Component.processEvent(Component.java:6053)
	at java.awt.Container.processEvent(Container.java:2041)
	at java.awt.Component.dispatchEventImpl(Component.java:4651)
	at java.awt.Container.dispatchEventImpl(Container.java:2099)
	at java.awt.Component.dispatchEvent(Component.java:4481)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
	at java.awt.Container.dispatchEventImpl(Container.java:2085)
	at java.awt.Window.dispatchEventImpl(Window.java:2478)
	at java.awt.Component.dispatchEvent(Component.java:4481)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:643)
	at java.awt.EventQueue.access$000(EventQueue.java:84)
	at java.awt.EventQueue$1.run(EventQueue.java:602)
	at java.awt.EventQueue$1.run(EventQueue.java:600)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
	at java.awt.EventQueue$2.run(EventQueue.java:616)
	at java.awt.EventQueue$2.run(EventQueue.java:614)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:613)
	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 thought a solution: Before searching i tried to clear selection from the table, but it didn't work. I commented it in "Search" action, as you can see.

The GUI looks like this:



Edit: I forgot to give my table code

            MyDefaultTableModel tableModel = new MyDefaultTableModel(e.readRows(path),title);
            table = new JTable(tableModel);
            table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
            selectionModel = table.getSelectionModel(); 
            selectionModel.addListSelectionListener(this);
 
            sorter = new TableRowSorter<TableModel>(table.getModel()); //this is for sorting and filtering
            table.setRowSorter(sorter);

import javax.swing.table.*;
import javax.swing.*;
import java.util.*;
 
 
class MyDefaultTableModel extends DefaultTableModel {
 
    public MyDefaultTableModel(Object[][] data, Object[] columnNames) {  
        super(data, columnNames);
    }  
 
    //disable editing, default is true
    public boolean isCellEditable(int row, int col) {  
        return false;  
    }
 
 
}

Any suggestion to this problem ?


EDIT 2: I solved the problem This is always happening, when you write some problems and than you see the solution
The problem Reason : "getSelectedRow()" returns -1 if no row is selected. Than "table.getValueAt(table.getSelectedRow(), 0);" gives "java.lang. Arra yIndexOutOfBoundsException: -1". I simply put this:

if(table.getSelectedRow() != -1)
            selection = table.getValueAt(table.getSelectedRow(), 0);