### Question:
StatisticalLineAndShapeRenderer extends LineAndShapeRenderer implements Cloneable, PublicCloneable, Serializable { @Override public int hashCode() { int hash = super.hashCode(); hash = HashUtils.hashCode(hash, this.errorIndicatorPaint); return hash; } StatisticalLineAndShapeRenderer();  StatisticalLineAndShapeRenderer(boolean linesVisible,
                                           boolean shapesVisible); Paint getErrorIndicatorPaint(); void setErrorIndicatorPaint(Paint paint); Stroke getErrorIndicatorStroke(); void setErrorIndicatorStroke(Stroke stroke); @Override Range findRangeBounds(CategoryDataset dataset); @Override void drawItem(Graphics2D g2, CategoryItemRendererState state, 
            Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis,
            ValueAxis rangeAxis, CategoryDataset dataset, int row, int column,
            int pass); @Override boolean equals(Object obj); @Override int hashCode();  }### Answer:
@Test public void testHashcode() { StatisticalLineAndShapeRenderer r1 = new StatisticalLineAndShapeRenderer(); StatisticalLineAndShapeRenderer r2 = new StatisticalLineAndShapeRenderer(); assertEquals(r1, r2); int h1 = r1.hashCode(); int h2 = r2.hashCode(); assertEquals(h1, h2); }