TIP: Making JOptionPane dialog resizable

It is a well known issue that the dialogs shown by the javax.swing.JOptionPane are not resizable. In the last blog entry there was a tip in the code about just how to make the dialogs shown by javax.swing.JOptionPane resizable. Here is the relevant snippet of code:

        // TIP: Make the JOptionPane resizable using the HierarchyListener
        editorPane.addHierarchyListener(new HierarchyListener() {
            public void hierarchyChanged(HierarchyEvent e) {
                Window window = SwingUtilities.getWindowAncestor(editorPane);
                if (window instanceof Dialog) {
                    Dialog dialog = (Dialog)window;
                    if (!dialog.isResizable()) {
                        dialog.setResizable(true);
                    }
                }
            }
        });

The tip works if you are using any java.awt.Component subclass as the message in javax.swing.JOptionPane. The tip works by listening to the hierarchy event on the message component, finding the java.awt.Dialog component and setting it's resizable property to true.