TableModelListener Problem

Question

Hi, My application has a JTree and a PropertyInspector which has a JTable.
When a user selects any node in JTree, I refresh the PropertyInspector and displays the property of the selected node. Now I have a problem in TableModelListener.
For example, I select a node, it has 5 properties, so my Table display 5 properties, I edit the 1st one, and selects the second row to edit, It works fine. TableModelListener called and works perfectly.
But when I edit the 1st property and choose another Tree Node, then TableModelListener returns the getFirstRow to -1 and my programs fails there.
My code is as follows:
   class TableListener
       implements TableModelListener {
      private JTable table;
      public TableListener(JTable table) {
      this.table = table;
      public void tableChanged(TableModelEvent e) {
      int firstRow = e.getFirstRow();
      System.out.println("First Row: " + firstRow); // This is -1 when I select another node.
      int lastRow = e.getLastRow();
      System.out.println("Last Row: " + lastRow);
      int editCol = e.getColumn();
      TableModel model = (TableModel) e.getSource();
      if (e.getType() == TableModelEvent.UPDATE) {
         if (editCol == 0) {
            /*Boolean chk = (Boolean)table.getValueAt(editRow, 0);
              if(chk.booleanValue()) {
                 System.out.println("Box is Selected");
              else {
                 System.out.println("Box is Not Selected");
         else {
            try {
            save(dataObject, model.getValueAt(firstRow, PROPERTY_COLUMN).toString(),
                 model.getValueAt(firstRow, VALUE_COLUMN).toString());
            System.out.println("Saving: " + model.getValueAt(firstRow, PROPERTY_COLUMN).toString() + " " +
                         model.getValueAt(firstRow, VALUE_COLUMN).toString());
            } catch (ArrayIndexOutOfBoundsException ex) {
            System.out.println("ArrayIndexOutOfBoundsException");
   }Any help plz.
Thanks

Answer 1

Hi, My application has a JTree and a PropertyInspector which has a JTable.
When a user selects any node in JTree, I refresh the PropertyInspector and displays the property of the selected node. Now I have a problem in TableModelListener.
For example, I select a node, it has 5 properties, so my Table display 5 properties, I edit the 1st one, and selects the second row to edit, It works fine. TableModelListener called and works perfectly.
But when I edit the 1st property and choose another Tree Node, then TableModelListener returns the getFirstRow to -1 and my programs fails there.
My code is as follows:
   class TableListener
       implements TableModelListener {
      private JTable table;
      public TableListener(JTable table) {
      this.table = table;
      public void tableChanged(TableModelEvent e) {
      int firstRow = e.getFirstRow();
      System.out.println("First Row: " + firstRow); // This is -1 when I select another node.
      int lastRow = e.getLastRow();
      System.out.println("Last Row: " + lastRow);
      int editCol = e.getColumn();
      TableModel model = (TableModel) e.getSource();
      if (e.getType() == TableModelEvent.UPDATE) {
         if (editCol == 0) {
            /*Boolean chk = (Boolean)table.getValueAt(editRow, 0);
              if(chk.booleanValue()) {
                 System.out.println("Box is Selected");
              else {
                 System.out.println("Box is Not Selected");
         else {
            try {
            save(dataObject, model.getValueAt(firstRow, PROPERTY_COLUMN).toString(),
                 model.getValueAt(firstRow, VALUE_COLUMN).toString());
            System.out.println("Saving: " + model.getValueAt(firstRow, PROPERTY_COLUMN).toString() + " " +
                         model.getValueAt(firstRow, VALUE_COLUMN).toString());
            } catch (ArrayIndexOutOfBoundsException ex) {
            System.out.println("ArrayIndexOutOfBoundsException");
   }Any help plz.
Thanks