Set the color of a row depending the value of the column in JTable?

Question

Hi All,
I have a JTable that add rows when the user clicks on the button. In this way there can be any no. of rows in my table. My table contains five columns. When a new row is added , it is added with new data each time. Also the data of the rows keep on changing time to time.
My problem is that when the data value for the third column comes out to be -ve then color of the row should be red and if its value is +ve then the color of the row should be green.
I have tried for this in the way but it is not working properly.
public Component prepareRenderer(TableCellRenderer renderer,int rowIndex, int vColIndex)
     Component c = super.prepareRenderer(renderer, rowIndex, vColIndex);
if(change<0 && rowIndex<table.getRowCount() )
          c.setForeground(Color.red);
          c.setFont(new Font("TimesRoman",Font.PLAIN,11));
else if(change>0&&rowIndex<table.getRowCount() )
c.setForeground(new Color(20,220,20));
     c.setFont(new Font("TimesRoman",Font.PLAIN,11));
return c;
where change is the value of the third column.
Any help is highly appreciated.
Thanx in advance.
Regards,
Har Krishan

Answer 1

Why do you have 3 postings on this topic all made within minutes of each other? (see [url http://forum.java.sun.com/thread.jspa?threadID=574547&tstart=0]here and [url http://forum.java.sun.com/thread.jspa?threadID=574543&tstart=0]here).
If you created a post by mistake then make a comment in the posting so people don't waste there time attempting to answer an old post.
where change is the value of the third column.How do you know "change" is the value of the third column? Did you use a System.out.println(...) to verify this.
A better approach is to use:
Object o = table.getModel().getValueAt(row, 2);
Then convert the Object to an int value and do your testing. This way you are guaranteed to be testing against the correct value.