How to run this java applet program

//how to run this java applet program?
import java.awt.*;
import java.applet.*;
/*
<applet code="BarChart.class width=300 height=250>
<param name="columns"value="4">
<param name="c1" value="78">
<param name="c2" value="85">
<param name="c3" value="93">
<param name="c4" value="56">
<param name="label1"value="Tamil">
<param name="label2"value="English">
<param name="label3"value="Maths">
<param name="label4"value="Physics">
</applet>
*/
public class BarChart extends Applet
{
int n=0;
String label[];
int value[];
public void init()
{
try
{
n=Integer.parseInt(getParameter("columns"));
label=new String[n];
value=new int[n];
label[0]=getParameter("label1");
label[1]=getParameter("label2");
label[2]=getParameter("label3");
label[3]=getParameter("label4");
value[0]=Integer.parseInt(getParameter("c1"));
value[1]=Integer.parseInt(getParameter("c2"));
value[2]=Integer.parseInt(getParameter("c3"));
value[3]=Integer.parseInt(getParameter("c4"));
}
catch(NumberFormatException e){}
}
public void paint(Graphics g)
{
for(int i=0;i<n;i++)
{
g.setColor(Color.red);
g.drawString(label[i],20,i*50+30);
g.fillRect(50,i*50+10,value[i],40);
}
}
}