package javaapplication6;

import javafx.application.Application;
import javafx.collections.ObservableList;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TreeCell;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeView;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.Callback;

public class JavaApplication6 extends Application {

    private int onEditStartCounter = 0;
    private int onEditCancelCounter = 0;
    private int onEditCommitCounter = 0;

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) throws Exception {
        TreeView<String> treeView = new TreeView<>();
        treeView.setEditable(true);
        treeView.setCellFactory(getCellFactory());

        TreeItem<String> rootItem = new TreeItem<>("root");

        treeView.setRoot(rootItem);

        ObservableList<TreeItem<String>> children = treeView.getRoot().getChildren();
        for (int i = 0; i < 10; i++) {
            children.add(new TreeItem("item-" + (i + 1)));
        }

        final Label labelOnEditStartCounter = new Label("On edit start: ");
        final Label labelOnEditCancelCounter = new Label("On edit cancel: ");
        final Label labelOnEditCommitCounter = new Label("On edit commit: ");

        treeView.setOnEditStart(new EventHandler() {
            @Override
            public void handle(Event t) {
                onEditStartCounter++;
                labelOnEditStartCounter.setText("On edit start: " + String.valueOf(onEditStartCounter));
            }
        });

        treeView.setOnEditCommit(new EventHandler() {
            @Override
            public void handle(Event t) {
                onEditCommitCounter++;
                labelOnEditCommitCounter.setText("On edit commit: " + String.valueOf(onEditCommitCounter));
            }
        });

        treeView.setOnEditCancel(new EventHandler() {
            @Override
            public void handle(Event t) {
                onEditCancelCounter++;
                labelOnEditCancelCounter.setText("On edit cancel: " + String.valueOf(onEditCancelCounter));
            }
        });

        VBox vBox = new VBox(10d);
        vBox.getChildren().addAll(labelOnEditStartCounter, labelOnEditCancelCounter, labelOnEditCommitCounter);

        HBox hBox = new HBox(15d);
        hBox.getChildren().addAll(treeView, vBox);
        Scene scene = new Scene(hBox, 400, 300);
        stage.setScene(scene);
        stage.show();
    }

    private Callback<TreeView<String>, TreeCell<String>> getCellFactory() {
        return javafx.scene.control.cell.TextFieldTreeCell.forTreeView();
    }
}

Steps to reproduce:
1. Expand the root;
2. Click at any item;
3. Press F2;
4. You will see that onEditStart counter has increased by 2.