JavaFX 图表 - Java.lang.IllegalArgumentException：添加了重复系列

Question

我正在使用clear() 方法从图表中删除数据。

@FXML
public void restartButtonClicked() {
    System.out.println("Restarting...");
    timeLine.getKeyFrames().clear();

    axesTest.getData().clear();
}

在这个函数中，但是一旦按钮被点击 - 它工作.. 但是当我第二次点击它时，它会抛出异常：

Exception in thread "JavaFX Application Thread" java.lang.IllegalArgumentException: Duplicate series added
    at javafx.scene.chart.XYChart.lambda$new$550(Unknown Source)
    at com.sun.javafx.collections.ListListenerHelper$SingleChange.fireValueChangedEvent(Unknown Source)
    at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(Unknown Source)
    at javafx.collections.ObservableListBase.fireChange(Unknown Source)
    at javafx.collections.ListChangeBuilder.commit(Unknown Source)
    at javafx.collections.ListChangeBuilder.endChange(Unknown Source)
    at javafx.collections.ObservableListBase.endChange(Unknown Source)
    at javafx.collections.ModifiableObservableListBase.addAll(Unknown Source)
    at sample.Controller.startButtonClicked(Controller.java:138)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at sun.reflect.misc.Trampoline.invoke(Unknown Source)
    at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at sun.reflect.misc.MethodUtil.invoke(Unknown Source)
    at javafx.fxml.FXMLLoader$MethodHandler.invoke(Unknown Source)
    at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(Unknown Source)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
    at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
    at javafx.event.Event.fireEvent(Unknown Source)
    at javafx.scene.Node.fireEvent(Unknown Source)
    at javafx.scene.control.Button.fire(Unknown Source)
    at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(Unknown Source)
    at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(Unknown Source)
    at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(Unknown Source)
    at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(Unknown Source)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
    at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
    at javafx.event.Event.fireEvent(Unknown Source)
    at javafx.scene.Scene$MouseHandler.process(Unknown Source)
    at javafx.scene.Scene$MouseHandler.access$1500(Unknown Source)
    at javafx.scene.Scene.impl_processMouseEvent(Unknown Source)
    at javafx.scene.Scene$ScenePeerListener.mouseEvent(Unknown Source)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(Unknown Source)
    at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(Unknown Source)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Unknown Source)
    at com.sun.glass.ui.View.handleMouseEvent(Unknown Source)
    at com.sun.glass.ui.View.notifyMouse(Unknown Source)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

所以问题出在方法的 138 行和 159 行代码中：

@SuppressWarnings("unchecked")
@FXML
public void startButtonClicked(ActionEvent event) {
if (comboBox.getValue() == null) {
    System.out.print("Nie wybrano opcji.");
} else {
    if(comboBox.getValue().equals("Gaussian Wave : non-Dispersive")) {
        System.out.println("Gaussian Wave : non-Dispersive");
        axesTest.setTitle("Gaussian Wave : non-Dispersive");

        series.setName("bla");
        series1.setName("ssad");
        series2.setName("asf");

        seriesList.add(series);
        seriesList.add(series1);
        seriesList.add(series2);

        timeLine = new Timeline();
        gaussianWave = new GaussianWave( seriesList, axes, timeLine );
        seriesList = gaussianWave.draw();
        gaussianWave.update(axesTest);

        axesTest.getData().retainAll();
        axesTest.getData().addAll(seriesList);
    } else if(comboBox.getValue().equals("Gaussian Wave : Dispersive")) {
        System.out.println("Gaussian Wave : Dispersive");
        axesTest.setTitle("Gaussian Wave : Dispersive");

        series.setName("bla");
        series1.setName("ssad");
        series2.setName("asf");

        seriesList.add(series);
        seriesList.add(series1);
        seriesList.add(series2);

        timeLine = new Timeline();
        gaussianWaveDispersive = new GaussianWaveDispersive( seriesList, axes, timeLine );
        seriesList = gaussianWaveDispersive.draw();
        gaussianWaveDispersive.update(axesTest);

        axesTest.getData().retainAll();
        axesTest.getData().addAll(seriesList);
    }
}

}

问题出在：

axesTest.getData().addAll(seriesList);

为什么在清除图表中的所有数据后会出现此异常？我该如何解决这个问题？

Answer 1

你清除了Series的dataProperty中存储的ObservableList：

axesTest.getData().clear();

但是您使用了一个名为seriesList 的中间列表（？），而不是直接添加Data：

seriesList.add(series);
seriesList.add(series1);
seriesList.add(series2)

...

axesTest.getData().addAll(seriesList);

问题是你在添加元素之前没有清除seriesList，所以它包含了第二次点击两次的元素，这将导致IllegalArgumentException。

其实我不知道这里发生了什么：

gaussianWave = new GaussianWave( seriesList, axes, timeLine );
seriesList = gaussianWave.draw();

但似乎seriesList 在这些行之后包含先前的Data 对象。