Resolving start: applet not initialized Error

/*<applet code="com.MyApplet.class" width=400 height=500>
</applet> */
//package com;
import java.applet.Applet ;
import java.awt.Button ;
public class MyApplet extends Applet
{
Button b;
public void init()
{
b=new Button();
add(b);
}

}