Edit C:\Program Files\Java\jdk1.8.0_121\com\sun\javafx\css\StyleCacheEntry.java

/*
 * Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
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 *
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 */
package com.sun.javafx.css;

import javafx.css.PseudoClass;
import javafx.scene.text.Font;

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

/**
 *
 */
public final class StyleCacheEntry {

public StyleCacheEntry() {
    }

public CalculatedValue get(String property) {

CalculatedValue cv = null;
        if (calculatedValues != null && ! calculatedValues.isEmpty()) {
            cv = calculatedValues.get(property);
        }
        return cv;
    }

public void put(String property, CalculatedValue calculatedValue) {

if (calculatedValues == null) {
            this.calculatedValues = new HashMap<>(5);
        }

calculatedValues.put(property, calculatedValue);
    }

public final static class Key {

private final Set<PseudoClass>[] pseudoClassStates;
        private final double fontSize;
        private int hash = Integer.MIN_VALUE;

public Key(Set<PseudoClass>[] pseudoClassStates, Font font) {

this.pseudoClassStates = new Set[pseudoClassStates.length];
            for (int n=0; n<pseudoClassStates.length; n++) {
                this.pseudoClassStates[n] = new PseudoClassState();
                this.pseudoClassStates[n].addAll(pseudoClassStates[n]);
            }
            this.fontSize = font != null ? font.getSize() : Font.getDefault().getSize();

}

@Override public String toString() {
            return Arrays.toString(pseudoClassStates) + ", " + fontSize;
        }

public static int hashCode(double value) {
            long bits = Double.doubleToLongBits(value);
            return (int)(bits ^ (bits >>> 32));
        }

@Override
        public int hashCode() {
            if (hash == Integer.MIN_VALUE) {

hash = hashCode(fontSize);

final int iMax = pseudoClassStates != null ? pseudoClassStates.length : 0;

for (int i=0; i<iMax; i++) {

final Set<PseudoClass> states = pseudoClassStates[i];
                    if (states != null) {
                        hash = 67 * (hash + states.hashCode());
                    }
                }
            }
            return hash;
        }

@Override
        public boolean equals(Object obj) {

if (obj == this) return true;

if (obj == null || obj.getClass() != this.getClass()) return false;

final Key other = (Key) obj;

if (this.hash != other.hash) return false;

//
            // double == double is not reliable since a double is kind of
            // a fuzzy value. And Double.compare is too precise.
            // For javafx, most sizes are rounded to the nearest tenth
            // (see SizeUnits.round) so comparing  here to the nearest
            // millionth is more than adequate.
            //
            // We assume that both fsize values are > 0, which is a safe assumption
            // because Font doesn't allow sizes < 0.
            final double diff = fontSize - other.fontSize;
            // Math.abs(diff, 0.000001) is too slow
            if (diff < -0.000001 || 0.000001 < diff) {
                return false;
            }

// either both must be null or both must be not-null
            if ((pseudoClassStates == null) ^ (other.pseudoClassStates == null)) {
                return false;
            }

// if one is null, the other is too.
            if (pseudoClassStates == null) {
                return true;
            }

if (pseudoClassStates.length != other.pseudoClassStates.length) {
                return false;
            }

for (int i=0; i<pseudoClassStates.length; i++) {

final Set<PseudoClass> this_pcs = pseudoClassStates[i];
                final Set<PseudoClass> other_pcs = other.pseudoClassStates[i];

// if one is null, the other must be too
                if (this_pcs == null ? other_pcs != null : !this_pcs.equals(other_pcs)) {
                    return false;
                }
            }

return true;
        }

}

//    private final Reference<StyleCacheEntry> sharedCacheRef;
    private Map<String,CalculatedValue> calculatedValues;
//    private CalculatedValue  font; // for use in converting font relative sizes
}

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