Edit C:\Program Files\Java\jdk1.8.0_121\com\sun\javafx\scene\control\skin\LabeledImpl.java

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package com.sun.javafx.scene.control.skin;

import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.scene.control.Label;
import javafx.scene.control.Labeled;

import javafx.css.CssMetaData;
import javafx.css.StyleOrigin;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javafx.css.Styleable;
import javafx.css.StyleableProperty;
import javafx.scene.layout.Region;

public class LabeledImpl extends Label {

public LabeledImpl(final Labeled labeled) {
        shuttler = new Shuttler(this, labeled);
    }
    private final Shuttler shuttler;

private static void initialize(Shuttler shuttler, LabeledImpl labeledImpl, Labeled labeled) {

labeledImpl.setText(labeled.getText());
        labeled.textProperty().addListener(shuttler);

labeledImpl.setGraphic(labeled.getGraphic());
        labeled.graphicProperty().addListener(shuttler);

final List<CssMetaData<? extends Styleable, ?>> styleables = StyleableProperties.STYLEABLES_TO_MIRROR;

for(int n=0, nMax=styleables.size(); n<nMax; n++) {
            @SuppressWarnings("unchecked")
            final CssMetaData<Styleable,Object> styleable = (CssMetaData<Styleable,Object>)styleables.get(n);

// the Labeled isn't necessarily a Label, so skip the skin or
            // we'll get an argument type mismatch on the invocation of the
            // skin constructor.
            if ("-fx-skin".equals(styleable.getProperty())) continue;

final StyleableProperty<?> fromVal = styleable.getStyleableProperty(labeled);
            if (fromVal instanceof Observable) {
                // listen for changes to this property
                ((Observable)fromVal).addListener(shuttler);
                // set this LabeledImpl's property to the same value as the Labeled.
                final StyleOrigin origin = fromVal.getStyleOrigin();
                if (origin == null) continue;
                final StyleableProperty<Object> styleableProperty = styleable.getStyleableProperty(labeledImpl);
                styleableProperty.applyStyle(origin, fromVal.getValue());
            }
        }
    }

private static class Shuttler implements InvalidationListener {

private final LabeledImpl labeledImpl;
        private final Labeled labeled;

Shuttler(LabeledImpl labeledImpl, Labeled labeled) {
            this.labeledImpl = labeledImpl;
            this.labeled = labeled;
            initialize(this, labeledImpl, labeled);

}

@Override public void invalidated(Observable valueModel) {

if (valueModel == labeled.textProperty()) {
                labeledImpl.setText(labeled.getText());
            } else if (valueModel == labeled.graphicProperty()) {
                // If the user set the graphic, then mirror that.
                // Otherwise, the graphic was set via the imageUrlProperty which
                // will be mirrored onto the labeledImpl by the next block.
                StyleOrigin origin = ((StyleableProperty<?>)labeled.graphicProperty()).getStyleOrigin();
                if (origin == null || origin == StyleOrigin.USER) {
                    labeledImpl.setGraphic(labeled.getGraphic());
                }

} else if (valueModel instanceof StyleableProperty) {
                StyleableProperty<?> styleableProperty = (StyleableProperty<?>)valueModel;
                @SuppressWarnings("unchecked")
                CssMetaData<Styleable,Object> cssMetaData = (CssMetaData<Styleable,Object>)styleableProperty.getCssMetaData();
                if (cssMetaData != null) {
                    StyleOrigin origin = styleableProperty.getStyleOrigin();
                    StyleableProperty<Object> targetProperty = cssMetaData.getStyleableProperty(labeledImpl);
                    targetProperty.applyStyle(origin, styleableProperty.getValue());
                }
            }
        }
    }

/** Protected for unit test purposes */
    static final class StyleableProperties {

static final List<CssMetaData<? extends Styleable, ?>> STYLEABLES_TO_MIRROR;
        static {
            //
            // We do this as we only want to mirror the Labeled's keys,
            // none of Parent's, otherwise all of the properties on Parent,
            // like opacity, would be applied twice (once to the Labeled and
            // again to the LabeledImpl).
            //
            // Note, however, that this subset is not the list of properties
            // for this LabeledImpl that can be styled. For that, we want all
            // the properites that are inherited by virtue of LabeledImpl
            // being a Label. This allows for the LabledImpl to be styled
            // with styles like .menu-button .label { -fx-opacity: 80%; }
            // If just this subset were returned (by impl_CSS_STYLEABLE) then
            // -fx-opacity (for example) would be meaningless to the Labeled.
            //
            final List<CssMetaData<? extends Styleable, ?>> labeledStyleables = Labeled.getClassCssMetaData();
            final List<CssMetaData<? extends Styleable, ?>> parentStyleables = Region.getClassCssMetaData();
            final List<CssMetaData<? extends Styleable, ?>> styleables =
                new ArrayList<CssMetaData<? extends Styleable, ?>>(labeledStyleables);
            styleables.removeAll(parentStyleables);
            STYLEABLES_TO_MIRROR = Collections.unmodifiableList(styleables);
        }
    }

}

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