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How to create a 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
Updated on: 18-May-2020
1K+ Views
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