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The moose likes Swing / AWT / SWT and the fly likes Swing listSelectionListener communication Big Moose Saloon
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Author

Swing listSelectionListener communication

John Davis
Ranch Hand

Joined: Nov 02, 2000
Posts: 189
I have a Swing applet which has a JList in a JScrollPane. I did a jlist.addListSelectionListener and passed it the constructor for an anonymous inner class. In this inner class listener, I want to modify the content of a JLabel which has already been added to the content pane. The JLabel was constructed with an ImageIcon
JLabelphotoLabel= new JLabel();
try
{
URL photoURL = new URL ( "http://AccessibleSailing.info
/Asenseibeepysly.jpg");
photoLabel =
new JLabel(new ImageIcon(photoURL,"ragamuffin") );
}
catch(java.net.MalformedURLException me)
{

}
The listener inner class gets a selection which is in effect a user's selection of a different photo for the JLabel. How can I accomplish this? Naturally, the inner class is not allowed access to a local variable outside of its scope.
Jagan Mohan Reddy
Greenhorn

Joined: May 15, 2001
Posts: 18
Hi,
Make the label to be a final variable...

final JLabel label = new JLabel(new ImageIcon(URL,"Icon"));
In the inner class use
label.setIcon(new ImageIcon(URL,"Icon1"));

hope this mighr solve ur problem..
Regards,
Jagan Mohan Reddy
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Swing listSelectionListener communication
 
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