TreeModel specifies methods for getting a particular node of the tree, getting the number of children of a particular node, determining whether a node is a leaf, notifying the model of a change in the tree, and adding and removing tree model listeners.

Jul 6, 2019 · A Swing tutorial on how to create basic JTree component to display hierarchical data.

The model used by JTree. JTree and its related classes make extensive use of TreePaths for identifying nodes in the TreeModel. If a TreeModel returns the same object, as compared by equals, at two different indices under the same parent than the resulting TreePath objects will be considered equal as well.

Apr 24, 2025 · JTree is created with the specified TreeNode as its root. This allows you to define a custom structure for your tree by providing a root node explicitly. Mastering JTree allows Java developers to integrate hierarchical information into graphical user interfaces.

To use JTree to display compound nodes (for example, nodes containing both a graphic icon and text), subclass TreeCellRenderer and use setCellRenderer(javax.swing.tree.TreeCellRenderer) to tell the tree to use it.

For example, Swing's JTree component can be used with an object that implements the TreeModel interface. Similarly, a JTable can be used with a TableModel, and a JList can be used with a ListModel. But in each of these cases, a model interface is …

Nov 28, 2013 · More sophisticated Swing components such as JTree, JTable, JList or JComboBox work with the concept of model. It means: the subjacent data that is being displayed by the component.

Dec 16, 2009 · First of all let me say that the only way i know to refresh a tree to reflect underlying changes, is to call the updateUI (), or reuse the setModel () method. Essentially, my problem is this: Suppose the TreeModelListener has just been notified (through the TreeModelListener API) that a change has occured in the model. Ok, what now?

Dec 30, 2009 · You need to have a custom implementation of a TreeModel and TreeNode, see bellow. Just extend LazyTreeModel and implement loadChildren ().

The javax.swing.JTree class is a powerful Swing component for displaying tree-structured data. Like all Swing components, JTree relies on a separate model object to hold and represent the data that it displays.