Applet code:
<applet code=com.objectplanet.chart.ChartApplet
 archive=chart.jar width=450 height=300>
<param name=chart value="bar">
<param name=sampleValues value="10,20,30,40,50">
<param name=rangeStep value=20>
<param name=barWidth value="0.6">
<param name=sampleColors value="#B9E4F1">
<param name=background value=white>
<param name=overlay0 value="bar">
<param name=overlay0_sampleValues value="28,46,34,45,37">
<param name=overlay0_sampleColors value="#FFDCC4">
<param name=overlay0_barWidth value="0.3">
<param name=overlay1 value="line">
<param name=overlay1_sampleValues value="6,8,14,25,17">
<param name=overlay1_sampleColors value="#B5B5EB">
<param name=overlay1_stackedOn value="true">
</applet>



Servlet code:
<img src="http://localhost:8080/servlet/com.objectplanet.chart.ChartServlet?
chart=bar&
width=450&
height=300&
sampleValues=10,20,30,40,50&
rangeStep=20&
barWidth=0.6&
sampleColors=%23B9E4F1&
background=white&
overlay0=bar&
overlay0_sampleValues=28,46,34,45,37&
overlay0_sampleColors=%23FFDCC4&
overlay0_barWidth=0.3&
overlay1=line&
overlay1_sampleValues=6,8,14,25,17&
overlay1_sampleColors=%23B5B5EB&
overlay1_stackedOn=true">


Application code:
package com.objectplanet.chart.testing; 
 
import com.objectplanet.chart.*; 
import java.awt.*; 
 
public class Overlay { 
 
    public static void main(String[] argv) { 
        double[] sampleValues = new double[] {10,20,30,40,50};
        double[] overlayValues_0 = new double[] {28,46,34,45,37};
        double[] overlayValues_1 = new double[] {6,8,14,25,17};
        
        BarChart chart = new BarChart();
        chart.setSampleCount(sampleValues.length);
        chart.setSampleValues(0, sampleValues);
        chart.setRelativeRange(0, 1.0, 20);
        chart.setBarWidth(0.6);
        chart.setSampleColors(new Color[] {new Color(0xB9E4F1)});
        chart.setBackground(Color.white);
        
        BarChart overlay0 = new BarChart();
        overlay0.setSampleCount(overlayValues_0.length);
        overlay0.setSampleValues(0, overlayValues_0);
        overlay0.setSampleColors(new Color[] {new Color(0xFFDCC4)});
        overlay0.setBarWidth(0.3);
        chart.setOverlayChart(0, overlay0);
        
        LineChart overlay1 = new LineChart();
        overlay1.setSampleCount(overlayValues_1.length);
        overlay1.setSampleValues(0, overlayValues_1);
        overlay1.setSampleColors(new Color[] {new Color(0xB5B5EB)});
        overlay1.setStackedOn(true); 
        chart.setOverlayChart(1, overlay1);
        
        com.objectplanet.chart.NonFlickerPanel p = new com.objectplanet.chart.NonFlickerPanel(new BorderLayout());
        p.add("Center", chart);
        Frame f = new Frame();
        f.add("Center", p);
        f.setSize(450,320);
        f.show();
    }
}