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JTable: Update Value

Posted on 2006-10-23
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Last Modified: 2010-03-31
Hello:
I have created JTree using Arraylist. So Left side is JTree and when I pick the node it display its content to right side in JTable.  In the Table there are 5 colunms. 2 columns are JComboBox.
I have created JTable like this:
model = new DefaultTableModel(data, columns);
table = new JTable(model)
{

      public void setValueAt(Object value, int row, int col)
      {
            data[row][col] = value;
      }
};


// I add new Row like this
if(e.getSource() == AddNewRow)
{
  // add to array list  
  model.addRow(data);
}

Everything is working fine but the only problem is  The value that I change does not update right away.
When I select another node and go back to the previous node I see all the value that I have changed.

Can you please show me how to make this thing work?

Thanks
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Question by:T_Shah
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9 Comments
 
LVL 14

Expert Comment

by:hoomanv
ID: 17790103
You dont need to override the setValueAt method
0
 
LVL 14

Expert Comment

by:hoomanv
ID: 17790210
The original setValueAt invokes fireTableCellUpdated to notify the JTable of changes

public void setValueAt(Object value, int row, int col) {
      rowData[row][col] = value;
      fireTableCellUpdated(row, col);
}
0
 

Author Comment

by:T_Shah
ID: 17790481
You are right about that.
It was working fine but since Add tried to add new rows it is not working
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Author Comment

by:T_Shah
ID: 17790705
Is it possible because of size of data.
Initially I have size of data as follow

data = new String[arraylist.size()][5];

now I added new row I add like this:

if(e.getSource() == AddNewRow)
{
  // add values to array list  
  model.addRow(data);
}

Becaue I am having this problem since I am trying to add new Row...

Any suggesstion!!!!
0
 
LVL 14

Expert Comment

by:hoomanv
ID: 17790755
DefaultTableModel is not restricted to row or column count
There is somthing else working wrong in your code
0
 

Author Comment

by:T_Shah
ID: 17791039
Thanks for the advise.
I am doing this way
model = new DefaultTableModel(data, columns);
table = new JTable(model)

It does not work

But If I do this
table = new JTable(data, columns)

It let me change value and works fine but the important thing is I can not add/remove row
0
 
LVL 14

Accepted Solution

by:
hoomanv earned 75 total points
ID: 17794036
> I can not add/remove row
You can, thru the DefaultTableModel
Call model.addRow()
And it will invoke fireTableRowsInserted() internally
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