How to get selected node in JTree?
getSelectionPaths() method to get the selected node of a JTree component. This method returns an array of TreePath objects. In the case to get the last node in the path we can call the TreePath. getLastPathComponent() .
What is JTree?
JTree is a Swing component with which we can display hierarchical data. JTree is quite a complex component. A JTree has a ‘root node’ which is the top-most parent for all nodes in the tree. A node is an item in a tree.
What is DefaultMutableTreeNode in JTree?
A DefaultMutableTreeNode is a general-purpose node in a tree data structure. A node’s tree is the set of all nodes that can be reached by starting at the node and following all the possible links to parents and children. A node with no parent is the root of its tree; a node with no children is a leaf.
What is the purpose of JTree?
As the preceding figure shows, JTree displays its data vertically. Each row displayed by the tree contains exactly one item of data, which is called a node….Tree-Related Classes and Interfaces.
| Class or Interface | Purpose |
|---|---|
| JTree | The component that presents the tree to the user. |
| TreePath | Represents a path to a node. |
What is purpose of J tree?
The JTree class is used to display the tree structured data or hierarchical data. JTree is a complex component. It has a ‘root node’ at the top most which is a parent for all nodes in the tree.
What is the purpose of JTree Mcq?
The JTree class is used to display the tree structured data or hierarchical data. JTree is a complex component. It has a ‘root node’ at the top most which is a parent for all nodes in the tree. It inherits JComponent class.
How is JTree implemented?
Just use a standard jQuery-like AJAX config and jstree will automatically make an AJAX request populate the tree with the response. Add a class of jstree-closed to any LI node you return and do not nest an UL node and jstree will make another AJAX call as soon as the user opens this node.
What is purpose of JTree Mcq answer?
How does JTree work?
As the preceding figure shows, JTree displays its data vertically. Each row displayed by the tree contains exactly one item of data, which is called a node. Every tree has a root node from which all nodes descend. By default, the tree displays the root node, but you can decree otherwise.
What are the advantages of Swing over AWT?
Advantages of Swing
- Provides both additional functionalities and added components to AWT-replacement components.
- Swing components are platform-independent.
- Swing components can use a different look and feel.
- Swing components use the Model-View-Controller paradigm (MVC) and thus can provide a much more flexible UI.
Is used to read data from a client request Mcq?
Explanation: ServletRequest is used to read data from a client request.