I give an example of a TreeView in Java.
Please create this example using B4J.
B4X:
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeView;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import java.io.File;
import java.io.IOException;
public class TreeViewMain extends Application {
@Override
public void start(Stage stage) throws IOException {
File filePath = new File("D:\\IDEA Projects"); // you can change the path here to your desired path
// Create the root and items
TreeItem<String> root = createItems(filePath);
// create the treeview
TreeView<String> treeView = new TreeView<>(root);
// Create the Scene and show the stage
VBox layout = new VBox(treeView);
Scene scene = new Scene(layout, 400, 400);
stage.setScene(scene);
stage.setTitle("JavaFX TreeView");
stage.show();
// This code will print out the selected items on the TreeView
treeView.getSelectionModel().selectedItemProperty().addListener((observable, oldValue, newValue ) ->{
String selectedItem = newValue.getValue();
System.out.println(selectedItem);
});
}
// create the treeitems dynamically based on the given path
private TreeItem<String> createItems(File file){
TreeItem<String> treeItems = new TreeItem<>(file.getName());
if(file.isDirectory()){
File[] files = file.listFiles();
if(files != null){
for(File childItem : files){
treeItems.getChildren().addAll(createItems(childItem));
}
}
}
return treeItems;
}
public static void main(String[] args) {
launch();
}
}