Below
step-by-step procedure explains how to create tree views in javafx.
TestFX.java
Step 1: Define root item object.
TreeItem<String>
rootItem = new TreeItem<> ("Root");
Step 2: Define child items.
TreeItem<String>
level1Item1 = new TreeItem<> ("Level1_Child1");
TreeItem<String>
level1Item2 = new TreeItem<> ("Level1_Child2");
TreeItem<String>
level1Item3 = new TreeItem<> ("Level1_Child3");
Step 3: Add child items to the root item.
rootItem.getChildren().addAll(level1Item1,
level1Item2, level1Item3);
Step 4: Add the root item to the TreeView.
TreeView<String>
treeView = new TreeView<> (rootItem);
Find the
below working application.
TreeViewApp.java
package com.sample.demos; import javafx.application.Application; import javafx.geometry.Insets; import javafx.scene.Scene; import javafx.scene.control.TreeItem; import javafx.scene.control.TreeView; import javafx.scene.layout.VBox; import javafx.stage.Stage; public class TreeViewApp extends Application { @SuppressWarnings("unchecked") @Override public void start(Stage primaryStage) throws Exception { /* Define Root Item */ TreeItem<String> rootItem = new TreeItem<>("Root"); /* Defile 1st level child items */ TreeItem<String> level1Item1 = new TreeItem<>("Level1_Child1"); TreeItem<String> level1Item2 = new TreeItem<>("Level1_Child2"); TreeItem<String> level1Item3 = new TreeItem<>("Level1_Child3"); /* Add items to root item */ rootItem.getChildren().addAll(level1Item1, level1Item2, level1Item3); TreeItem<String> level2Item1 = new TreeItem<>("Level2_Child1"); TreeItem<String> level2Item2 = new TreeItem<>("Level2_Child1"); level1Item1.getChildren().addAll(level2Item1, level2Item2); TreeView<String> treeView = new TreeView<>(rootItem); VBox vBox = new VBox(10, treeView); vBox.setSpacing(5); vBox.setPadding(new Insets(10, 10, 10, 10)); primaryStage.setScene(new Scene(vBox)); primaryStage.setTitle("Tree View Example"); primaryStage.setWidth(900); primaryStage.setHeight(500); primaryStage.show(); } }
TestFX.java
package com.sample.demos; import javafx.application.Application; public class TestFX { public static void main(String args[]) { Application.launch(TreeViewApp.class, args); } }
Expand the
item Root, you can able to see the tree structure like below.
Expand
‘Level1_Child1’.
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