### Question:
VectorRenderer extends AbstractXYItemRenderer implements XYItemRenderer, Cloneable, PublicCloneable, Serializable { @Override public boolean equals(Object obj) { if (obj == this) { return true; } if (!(obj instanceof VectorRenderer)) { return false; } VectorRenderer that = (VectorRenderer) obj; if (this.baseLength != that.baseLength) { return false; } if (this.headLength != that.headLength) { return false; } return super.equals(obj); } VectorRenderer(); @Override Range findDomainBounds(XYDataset dataset); @Override Range findRangeBounds(XYDataset dataset); @Override void drawItem(Graphics2D g2, XYItemRendererState state,
            Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot,
            ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset,
            int series, int item, CrosshairState crosshairState, int pass); @Override boolean equals(Object obj); @Override Object clone();  }### Answer:
@Test public void testEquals() { VectorRenderer r1 = new VectorRenderer(); VectorRenderer r2 = new VectorRenderer(); assertEquals(r1, r2); assertEquals(r2, r1); r1.setSeriesFillPaint(0, Color.green); assertFalse(r1.equals(r2)); r2.setSeriesFillPaint(0, Color.green); assertEquals(r1, r2); }