Edit C:\Program Files\Java\jdk1.8.0_121\com\sun\javafx\sg\prism\NodePath.java

/*
 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package com.sun.javafx.sg.prism;

import java.util.ArrayList;
import java.util.List;

/**
 * Simple a reusable storage for root-to-node path.
 *
 */
public class NodePath {
    private List<NGNode> path = new ArrayList<>();
    private int position;

public NGNode last() {
        return path.isEmpty() ? null : path.get(path.size() - 1);
    }

// ITERATION methods

public NGNode getCurrentNode() {
        return path.get(position);
    }

public boolean hasNext() {
        return position < path.size() -1 && !isEmpty();
    }

public void next() {
        if (!hasNext()) {
            throw new IllegalStateException();
        }
        position++;
    }

public void reset() {
        position = path.isEmpty() ? -1 : 0;
    }

// MODIFICATION methods

public void clear() {
        position = -1;
        path.clear();
    }

public void add(NGNode n) {
        path.add(0, n);
        if (position == -1) position = 0;
    }

public int size() {
        return path.size();
    }

public boolean isEmpty() {
        return path.isEmpty();
    }

@Override public String toString() {
        return path.toString();
    }
}

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