Trees - The Definitive Guide to Java Swing - page 636

DefaultTreeCellEditor class. The DefaultCellEditor is primarily for use within a JTable , not
a JTree .
Figure 17-13. An editable JTree with a JComboBox editor
■ Caution When you use a noneditable JComboBox as the cell editor, if the set of choices doesn't include
the original node setting, it's impossible to get back to the original setting once the node value changes.
To see how awkward the appearance of a JCheckBox is with the DefaultCellEditor as a
TreeCellEditor , take a look at Figure 17-14.
Figure 17-14. An editable JTree with a JCheckBox editor
Figure 17-14 uses the following source:
Object array[] =
{Boolean.TRUE, Boolean.FALSE, "Hello"}; // Hello will map to false
JTree tree = new JTree(array);
tree.setEditable(true);
tree.setRootVisible(true);
JCheckBox checkBox = new JCheckBox();
TreeCellEditor editor = new DefaultCellEditor(checkBox);
tree.setCellEditor(editor);
■ Note Use of the JCheckBox with the DefaultCellEditor isn't recommended with a JTree . See the
“Creating a Better Check Box Node Editor” section later in this chapter for an implementation that's more
appropriate for a tree.