Another.java

ComboBoxJDK60.install(scene); // Setup the global focus listener

ComboBoxJDK60.java

package fr.bca.nap.jfx;

import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.stage.Stage;

/**
 * Fix behaviour for ComboBox on jdk 8_60 (regression). Setting up a Globale Node focus listener..
 */
public class ComboBoxJDK60 {

	public static void install(Scene scene) {
		scene.focusOwnerProperty().addListener((observable, oldValue, newValue) -> {
			// On focus in (should not be needed)
			// handleValue(newValue);
			// On focus out
			handleValue(oldValue);
		});
	}

	private static void handleValue(Node nodeValue) {
		if (nodeValue != null && nodeValue instanceof ComboBox) {
			ComboBox comboBox = (ComboBox) nodeValue;
			if (comboBox.isEditable()) {
				String value = comboBox.getEditor().getText();
				comboBox.setValue(comboBox.getConverter().fromString(value));
			}
		}
	}

	public static void install(Stage stage) {
		install(stage.getScene());
	}
}