JTable Combobox editor with PrppertychangeListener

Question

Hello,
I need a help from experts.
I have a JTable. In the java table i need to have a ComboBox editor for example on the second column. And when i am changing value in the combobox i need to to do some calculations in JTable object.
To setup a PropertyChangeListener on combo object is not what i want, because i can not make calcultions inside JTable.
I need ComboBox based editor for JTable with property change listener.
Can anybody point me to some example o sugest something?
Thanks a lot

Answer 1

Sollution
package kelias.table.editor;
import javax.swing.DefaultCellEditor;
import javax.swing.JTable;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.Component;
import kelias.ComboBox.MyDBComboBox;
Implements a cell editor that uses a formatted text field
to edit Integer values.
public class CarJobEditor extends DefaultCellEditor implements ItemListener
MyDBComboBox comboJobs;
//Darbo kiekis
String jobQuantity=new String();
//Lentel�
JTable tableTmp;
//Einamoji eilut�
int rowTmp;
int jobQColNumber;
int resultColIndex;
public CarJobEditor(int jobQColNumber,int resultColIndex)
super(new MyDBComboBox());
this.jobQColNumber=jobQColNumber;
this.resultColIndex=resultColIndex;
comboJobs = (MyDBComboBox) getComponent();
comboJobs.loadData(kelias.db.DBStrings.selectJobsForCombo());
comboJobs.addItemListener(this);
//Override to invoke setValue on the formatted text field.
public Component getTableCellEditorComponent(JTable table,Object value, boolean isSelected,int row, int column)
     jobQuantity=(String)table.getValueAt(row,jobQColNumber);
     this.tableTmp=table;
     this.rowTmp=row;
MyDBComboBox tmp = (MyDBComboBox)super.getTableCellEditorComponent(table, value, isSelected, row, column);
tmp.setSelectedItem(value);
return tmp;
public void itemStateChanged(ItemEvent event)
     if(event.getStateChange() == ItemEvent.SELECTED)
          if (!this.jobQuantity.equals(""))
               float price=kelias.db.DBGetData.selectJobPricePM(comboJobs.getSelectedItem());
               float quantity=Float.parseFloat((String)jobQuantity);
               float f = (float) (Math.round(price*quantity*100.0f)/100.0f);
               tableTmp.setValueAt(f,rowTmp,resultColIndex);
}