Brandon McCombs wrote:
The method I call for deleting a selected item from the JList is the
following (model is the instance of BrowserModel):
private void list_deleteObj() {
int idx = dirList.getSelectedIndex();
String dn = LDAPMgr.ldapUtility.getDN(
model.getListModel().getElementAt(idx) );
int ans = JOptionPane.showConfirmDialog(this,
"Confirm delete for:\n" + dn + "\n",
"Delete Object",JOptionPane.YES_NO_OPTION,
JOptionPane.PLAIN_MESSAGE);
if (ans == 1)
return;
String msg = null;
msg = LDAPMgr.ldapUtility.deleteEntry(
model.getListModel().getElementAt(idx));
/* if successful */
if (msg == null) {
model.getListModel().remove(idx);
/* reload the subtree and list to show deletion */
refresh();
}
}
What thread is the above method being executed on? If it's not the EDT
you have
a problem there, you are modifying the JList in a thread other than
the EDT.
The error is telling you that when the EDT came to draw a JList it
tried to
access element 1 and that element didn't exist in the the
DefaultListModel's
Vector at the time. That would imply a synchronization error, the
Vector is in
the process of being modified whilst it's being drawn (the JList and
DefaultTreeModel have a different idea of how many elements there
are), and I
don't see how that can happen unless it's being modified from another
thread -
even the EDT can only do one thing at a time...