Java Applets Access denied to file when applet is started

I am getting access denied to file when execute(compiled successfully) the following applet
Please help:

import java.io.*;import java.applet.*;import java.awt.*;public class counterApplet extends Applet{	public static int i=0;	public static String no="";	public static String pre="You Are Visitor Number: ";	public static String p="";		public void init(){	FileInputStream file=null;		try {file = new FileInputStream("counter");} catch(FileNotFoundException e) {System.exit(1);}	//load value and increment it	try{for(i=0;i!=10;) {i=(file.read());if(i==-1) {break;} else{no=no+(char)i;}}	i = Integer.parseInt(no)+1;}catch(Exception e){System.exit(1);}	//write new value	no=""+i;	BufferedOutputStream bu = null;		try {			bu= new BufferedOutputStream(new FileOutputStream("counter"));			bu.write(no.getBytes());}catch (FileNotFoundException ex) {ex.printStackTrace();} catch (IOException ex) {ex.printStackTrace();}		finally {				try {							if (bu != null) {								bu.flush();								bu.close();}							} catch (IOException ex) {							ex.printStackTrace();							}				}	}	public void start(){}	public void paint(Graphics g){	p=pre+no;	g.drawString(p,20,30);}}

If you think about where applets execute, you will find that a counter makes no sense.