Returning values from Swing using invokeAndWait
- by Joonas Pulakka
I've been using the following approach to create components and return values from Swing to/from outside the EDT. For instance, the following method could be an extension to JFrame, to create a JPanel and add it to the parent JFrame:
public JPanel threadSafeAddPanel() {
final JPanel[] jPanel = new JPanel[1];
try {
EventQueue.invokeAndWait(new Runnable() {
public void run() {
jPanel[0] = new JPanel();
add(jPanel[0]);
}
});
} catch (InterruptedException ex) {
} catch (InvocationTargetException ex) {
}
return jPanel[0];
}
The local 1-length array is used to transfer the "result" from inside the Runnable, which is invoked in the EDT. Well, it looks "a bit" hacky, and so my questions:
Does this make sense? Is anybody else doing something like this?
Is the 1-length array a good way of transferring the result?
Is there an easier way to do this?
