### Question:
StatisticalLineAndShapeRenderer extends LineAndShapeRenderer implements Cloneable, PublicCloneable, Serializable { @Override public int hashCode() { int hash = super.hashCode(); hash = HashUtilities.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); }