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  1. JDK
  2. JDK-8116159

NPE is thrown, when labelProperty is binded bidirectionally.

    Details

      Description

      I've created a program for charts, and I get exception in the pointed string. But actually, no any one line of my code is mentioned in exception, and there is no obvious reason for this.

      Code:

      import java.util.Arrays;
      import java.util.Comparator;
      import java.util.Random;
      import javafx.application.Application;
      import javafx.collections.FXCollections;
      import javafx.collections.ObservableList;
      import javafx.scene.Scene;
      import javafx.scene.chart.LineChart;
      import javafx.scene.chart.NumberAxis;
      import javafx.scene.chart.XYChart;
      import javafx.scene.control.TextField;
      import javafx.scene.layout.Pane;
      import javafx.scene.layout.VBox;
      import javafx.stage.Stage;

      public class JavaCharts extends Application {

          public static void main(String[] args) {
              launch(args);
          }
          NumberAxis axis1 = new NumberAxis(0, 100, 10);
          NumberAxis axis2 = new NumberAxis(0, 100, 10);
          LineChart testedLineChart = new LineChart(axis1, axis2);
          VBox vb = new VBox();

          @Override
          public void start(Stage stage) throws Exception {
              testedLineChart.setTitle("LineChart");
              testedLineChart.setStyle("-fx-border-color: darkgray;");

              ObservableList list = FXCollections.observableArrayList();
              int max = 100;
              int min = 30;

              for (int i = 0; i < 30; i++) {
                  XYChart.Data newData = new XYChart.Data();
                  newData.setXValue(new Random().nextDouble() * (max - min) + min);
                  newData.setYValue(new Random().nextDouble() * (max - min) + min);
                  list.add(newData);
              }
              Object[] array = list.toArray();
              Arrays.sort(array, new Comparator() {

                  @Override
                  public int compare(Object t, Object t1) {
                      return (int) Math.round(((Double) ((XYChart.Data) t).getXValue()) - ((Double) ((XYChart.Data) t1).getXValue()));
                  }
              });

              XYChart.Series serie = new XYChart.Series("serie", FXCollections.observableArrayList(array));

              testedLineChart.getData().add(serie);
              testedLineChart.setAlternativeColumnFillVisible(true);
              testedLineChart.setAlternativeRowFillVisible(true);

              Pane pane = new Pane();
              pane.setPrefSize(600, 600);

              TextField tf = new TextField("Text");

              //axis1.labelProperty().bindBidirectional(tf.textProperty());//Doesn't throw exception
              tf.textProperty().bindBidirectional(axis1.labelProperty());//Throw exception

              pane.setPrefSize(600, 600);
              pane.getChildren().add(testedLineChart);

              vb.getChildren().addAll(pane, tf);

              Scene scene = new Scene(vb, 700, 700);
              stage.setScene(scene);
              stage.show();
          }
      }

      To reproduce - type in any text.

      Exception:
      java.lang.NullPointerException
      at com.sun.javafx.scene.control.behavior.TextInputControlBehavior.defaultKeyTyped(TextInputControlBehavior.java:219)
      at com.sun.javafx.scene.control.behavior.TextInputControlBehavior.callAction(TextInputControlBehavior.java:129)
      at com.sun.javafx.scene.control.behavior.BehaviorBase.callActionForEvent(BehaviorBase.java:157)
      at com.sun.javafx.scene.control.behavior.TextInputControlBehavior.callActionForEvent(TextInputControlBehavior.java:117)
      at com.sun.javafx.scene.control.behavior.BehaviorBase$1.handle(BehaviorBase.java:121)
      at com.sun.javafx.scene.control.behavior.BehaviorBase$1.handle(BehaviorBase.java:119)
      at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:64)
      at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
      at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
      at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38)
      at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
      at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
      at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
      at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
      at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53)
      at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:33)
      at javafx.event.Event.fireEvent(Event.java:171)
      at javafx.scene.Scene$KeyHandler.process(Scene.java:3478)
      at javafx.scene.Scene$KeyHandler.access$2300(Scene.java:3433)
      at javafx.scene.Scene.impl_processKeyEvent(Scene.java:1865)
      at javafx.scene.Scene$ScenePeerListener.keyEvent(Scene.java:2231)
      at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleKeyEvent(GlassViewEventHandler.java:126)
      at com.sun.glass.ui.View.handleKeyEvent(View.java:518)
      at com.sun.glass.ui.View.notifyKey(View.java:951)
      at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
      at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
      at com.sun.glass.ui.win.WinApplication$2$1.run(WinApplication.java:62)
      at java.lang.Thread.run(Thread.java:722)

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              • Assignee:
                leifs Leif Samuelsson (Inactive)
                Reporter:
                akirov Alexander Kirov (Inactive)
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                • Created:
                  Updated:
                  Resolved:
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