### Question:
MultipleXYSeriesLabelGenerator implements XYSeriesLabelGenerator,
        Cloneable, PublicCloneable, Serializable { @Override public int hashCode() { int result = 127; result = HashUtils.hashCode(result, this.formatPattern); result = HashUtils.hashCode(result, this.additionalFormatPattern); result = HashUtils.hashCode(result, this.seriesLabelLists); return result; } MultipleXYSeriesLabelGenerator();  MultipleXYSeriesLabelGenerator(String format); void addSeriesLabel(int series, String label); void clearSeriesLabels(int series); @Override String generateLabel(XYDataset dataset, int series); @Override Object clone(); @Override boolean equals(Object obj); @Override int hashCode(); static final String DEFAULT_LABEL_FORMAT; }### Answer:
@Test public void testHashCode() { MultipleXYSeriesLabelGenerator g1 = new MultipleXYSeriesLabelGenerator(); MultipleXYSeriesLabelGenerator g2 = new MultipleXYSeriesLabelGenerator(); assertEquals(g1, g2); assertEquals(g1.hashCode(), g2.hashCode()); }