Create TreeView using JavaFX

A tree provides a view of hierarchical structures, each tree contains a root (highest object) and it contains children. You can create a tree view by instantiating the javafx.scene.control.TreeView class.

Example

The following Example demonstrates the creation of a TreeView.

import javafx.application.Application; import javafx.geometry.Insets; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.TreeItem; import javafx.scene.control.TreeView; import javafx.scene.layout.VBox; import javafx.scene.paint.Color; import javafx.stage.Stage; public class TreeViewExample extends Application {    public void start(Stage stage) {       //Creating tree items       TreeItem root1 = new TreeItem("Programming Languages");       TreeItem item1 = new TreeItem("Java");       TreeItem item2 = new TreeItem("Python");       TreeItem item3 = new TreeItem("C++");       //Adding elements to root1       root1.getChildren().addAll(item1, item2, item3);       TreeItem root2 = new TreeItem("NoSQL Databases");       TreeItem item4 = new TreeItem("Neo4j");       TreeItem item5 = new TreeItem("HBase");       TreeItem item6 = new TreeItem("Cassandra");       //Adding elements to root2       root2.getChildren().addAll(item4, item5, item6);       TreeItem root3 = new TreeItem("Bigdata & Analytics");       TreeItem item7 = new TreeItem("Hadoop");       TreeItem item8 = new TreeItem("Mahout");       TreeItem item9 = new TreeItem("Hive");       //Adding elements to root2       root3.getChildren().addAll(item7, item8, item9);       //list View for educational qualification       TreeItem<String> base = new TreeItem<String>("Technologies");       base.setExpanded(true);       base.getChildren().addAll(root1, root2, root3);       //Creating a TreeView item       TreeView view = new TreeView(base);       view.setPrefHeight(300);       VBox pane = new VBox(10);       pane.setPadding(new Insets(5, 5, 5, 50));       pane.getChildren().addAll(view);       //Setting the stage       Group node = new Group(pane);       Scene scene = new Scene(node, 595, 320, Color.BEIGE);       stage.setTitle("List View Example");       stage.setScene(scene);       stage.show();    }    public static void main(String args[]){       launch(args);    } }

Output