🚀 go-pugleaf

In article <37739F78.D5314A78@jhmi.edu>, lelliot@jhmi.edu says...
> I have an application in which the action of a JButton is to show a
> JDialog that contains a JTable on a JScrollPane.   I am using
> Intuitive's OptimizeIt to watch for objects that are not being garbage
> collected.
> When the JDialog is disposed, the JDialog, JScrollPane and JTable are
> not garbage collected.   It appears as though they are the owners of the
> focus.   Is it possible for a dialog to be diposed and still own the
> focus?    Is there a way to tranfer the focus back to the main frame of
> the application once the Jdialog has been disposed ?

Please realize that if you have a custom cell renderer, there is a 
horrible memory leak in Swing if you return a new object for each cell.  
Instead, you *MUST* return the same component for each cell.

For example, the default cell renderer extends JLabel and returns this 
for each row and cell requested.  It simply sets the text to be a 
different thing, sets the color if highlighted etc, then returns "this".

If you have multiple types of components displayed, return the same 
object for each type.

We ran into this and the memory leak crashed the JVM in a matter of hours 
of usage.  It doesn't say this in the API, only in the Java Tutorial.