Hvad er der galt??

Kode 

java.security.AccessControlException: access denied (java.io.FilePermission TWC.txt read)

	at java.security.AccessControlContext.checkPermission(Unknown Source)

	at java.security.AccessController.checkPermission(Unknown Source)

	at java.lang.SecurityManager.checkPermission(Unknown Source)

	at java.lang.SecurityManager.checkRead(Unknown Source)

	at java.io.FileInputStream.<init>(Unknown Source)

	at java.io.FileInputStream.<init>(Unknown Source)

	at java.io.FileReader.<init>(Unknown Source)

	at TWC_Hent.<init>(TWC_Hent.java:23)

	at TWC.init(TWC.java:39)

	at sun.applet.AppletPanel.run(Unknown Source)

	at java.lang.Thread.run(Unknown Source)

Kode 

import java.applet.*;
import java.awt.*;
import java.io.IOException;
import java.util.Vector;
public class TWC extends Applet implements Runnable
{
	boolean o, n, v, h, loeb;
	Thread tråd;
	TWC_Hent Hent;
	Image billede;
	Vector punkter;
	Image dethele;
	Graphics gr;
	int xx, xy;
	public void start()
	{
		if(tråd == null)
		{
			tråd = new Thread(this);
			tråd.start();
		}
	}
	public void stop()
	{
		if(tråd != null)
		{
			tråd.stop();
			tråd = null;
		}
	}
	public void init()
	{
		/*try {
			punkter = Hent.Placering();
		} catch (IOException e) {
			e.printStackTrace();
		}*/
		try {
			Hent = new TWC_Hent("Test","TEST");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	public void paint(Graphics g)
	{
		update(g);
	}
	public void update(Graphics g)
	{
		if (gr == null)
		{
			dethele = createImage(500, 500);
			gr = dethele.getGraphics();
		}
		g.drawImage(dethele, 0, 0, this);
	}
	public void run()
	{
		while(gr==null)
		{
			try
			{
				Thread.sleep(1);
			}catch(InterruptedException e){}
		}
		while(tråd == Thread.currentThread())
		{
			try {
				punkter = Hent.placering();
			} catch (IOException e) {
				e.printStackTrace();
			}
			Flytden();
			gr.setColor( new Color(255,255,255) );
			gr.fillRect(0,0,500,500);
			gr.setColor( new Color(255,0,0) );
			if(punkter != null)
			for(int i = 0;i<=punkter.size()-1;i++)
			{
				punkter.elementAt(i);
				Point punkt = (Point)(punkter.elementAt(i));
				gr.fillRect(punkt.x, punkt.y,30,50);
			}
			else
				gr.drawString("Forkert brugernavn/kodeord!!!",100,100);
			repaint();
			try {
				Thread.sleep(1);
		} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
	public boolean keyUp (Event e, int key) 
	{
		switch(key)
		{
			case 1004: o=false;break;
			case 1005: n=false;break;
			case 1007: h=false;break;
			case 1006: v=false;break;
			case 97: loeb=false;break;
			default:;
		}
		return true;
	}
	public boolean keyDown (Event e, int key) 
	{
		switch(key)
		{
			case 1004: o=true;break;
			case 1005: n=true;break;
			case 1007: h=true;break;
			case 1006: v=true;break;
			case 97: loeb=true;break;			
			default:;
		}
		return true;
	}
	public void Flytden()
	{
		xx=0;
		xy=0;
		if(o)
			xy--;
		if(n)
			xy++;
		if(v)
			xx--;
		if(h)
			xx++;
		if(loeb)
		{
			xx*=3;
			xy*=3;
		}	
		try {
			Hent.flyt(xx,xy);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

Kode 

import java.io.*;
import java.util.Vector;
import java.awt.*;
public class TWC_Hent
{
	String fil;
	BufferedReader ind;
	PrintWriter ud;
	String Brugernavn, Kodeord;
	String linie;
	String[] linie_array;
	Vector alting;
	int id;
	boolean rigtig;
	public TWC_Hent(String Brugernavnet, String Kodeordet) throws IOException
	{
		linie_array = new String[4];
		rigtig = false;
		id=0;
		Brugernavn = Brugernavnet;
		Kodeord = Kodeordet;
		fil = "TWC.txt";
		ind = new BufferedReader( new FileReader(fil) );
		linie = ind.readLine();
		while(linie != null)
		{
			if(!rigtig)
				id++;
			System.out.println("Der står: "+linie);
			linie_array = linie.split(" ");
			if(Brugernavn.equalsIgnoreCase(linie_array[0])
			&& Kodeord.equalsIgnoreCase(linie_array[1]))
				rigtig = true;
			linie = ind.readLine();
		}
		System.out.println(rigtig);
	}
	public static void main(String[] args)
	{
	}
	public Vector placering() throws IOException
	{
		if(rigtig)
		{
			alting = new Vector();
			ind = new BufferedReader( new FileReader(fil) );
			linie = ind.readLine();
			while(linie != null)
			{
				linie_array = linie.split(" ");
				alting.addElement((Point)(
				new Point(Integer.parseInt(linie_array[2]),
				Integer.parseInt(linie_array[3]))));
				System.out.println(linie);
				linie = ind.readLine();
			}
			return alting;
		}
		else
			return null;
	}
	public void flyt(int x, int y) throws IOException
	{
		if(rigtig)
		{
			ind = new BufferedReader( new FileReader(fil) );
			linie = ind.readLine();
			int idet = 0;
			Vector linier = new Vector();
			while(linie != null)
			{
				idet++;
				if(idet == id)
				{
					linie_array = linie.split(" ");	
					x+=Integer.parseInt(linie_array[2]);
					y+=Integer.parseInt(linie_array[3]);
					if(x>450)	x=450;
					if(x<0)		x=0;
					if(y>450)	y=450;
					if(y<0)		y=0;				
					linie = linie_array[0]+" "+linie_array[1]+" "+x+" "+y;
					linier.addElement(linie);
				}
				else
					linier.addElement(linie);
				linie = ind.readLine();
			}
			ud = new PrintWriter( new FileWriter(fil) );
			for(int i = 0;i<=linier.size()-1;i++)
				ud.println(linier.elementAt(i));
			if(ud.checkError())
				System.out.print("FEJL!!!!!!");
			ud.close();
		}
	}
}