### Question:
XYStepRenderer extends XYLineAndShapeRenderer implements XYItemRenderer, Cloneable, PublicCloneable, Serializable { public void setStepPoint(double stepPoint) { if (stepPoint < 0.0d || stepPoint > 1.0d) { throw new IllegalArgumentException( "Requires stepPoint in [0.0;1.0]"); } this.stepPoint = stepPoint; fireChangeEvent(); } XYStepRenderer();  XYStepRenderer(XYToolTipGenerator toolTipGenerator,
            XYURLGenerator urlGenerator); double getStepPoint(); void setStepPoint(double stepPoint); @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 int hashCode(); @Override Object clone();  }### Answer:
@Test public void testSerialization() throws IOException, ClassNotFoundException { XYStepRenderer r1 = new XYStepRenderer(); r1.setStepPoint(0.123); ByteArrayOutputStream buffer = new ByteArrayOutputStream(); ObjectOutput out = new ObjectOutputStream(buffer); out.writeObject(r1); out.close(); ObjectInput in = new ObjectInputStream( new ByteArrayInputStream(buffer.toByteArray())); XYStepRenderer r2 = (XYStepRenderer) in.readObject(); in.close(); assertEquals(r1, r2); }