I have two classes and one problem :)
The first class is my MDI window (JFrame) where I've set up a
JDesktopPane. From a menu selection I add internal frames
(JInternalFrame classes) to the desktop. Each internal frame has some

How do I get the indexes of the selected rows in a JTable? Using the table's
ListSelectionModel and addSelectionListener I can get the selected indexes
one at a time but I want to be able to get an array of all the selected
indexes.  Is there a method that does this? If not how can ...

I'm currently successfully drawing a graph and strings onto a Graphics2D
object. However, the strings contain indices, like w1(x) or TA1, where
the numbers are displayed as subscipts (HTML <sub> tag). I use this sub
tag for creating JLabels, so in any other GUI, the indices ...

I want to get the text from a JTextfield when somebody enters text and
presses the "Send"-Button.
After that i want to do something with the text and display it in a
JTextarea.

I would like to change the color of a selected JToggleButton (in a
ButtonGroup) to red from grey. About the only solution I can find online
is to put this in my main program:
UIManager.put("ToggleButton.select", Color.red);