Applet refresh with MS-VM in IE fails

Question

Hi,
sorry, but I'm a real NEWBIE in java...
My problem is:
I use a simple freeware barchart applet on our website
and when first opened it works fine with IE5.5 or 6 (Microsoft VM!).
After a reload just a small part of the applet will
be rebuilt. No error is printed out in the Java Debug Console. With the jre 1.4 used in the IE theres no
problem!
Has anybody an idea how to make my applet "compatible" with the MS-VM??
Thanks in advance,
Dirk

Answer 1

Hi,
thanks for your answer!
Here's the code of the bar chart applet.
I've also written a little html-testpage and SURPRISE, after running the html-File locally the Applet works in IE (with MS VM) after Refresh!
No, I'm really confused :-(
Any idea?
Dirk
the java-source:
import java.applet.Applet;
import java.applet.AppletContext;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.net.MalformedURLException;
import java.net.URL;
public class BarChartDK extends Applet
implements MouseListener {
private int i;
private int AnzSaeulen;
private int Breite;
private int Hoehe;
private int Hoehe_diagramm;
private int Breite_diagramm;
private int AktKomPos1;
private int AktKomPos2;
private int j;
private int KomPos1;
private int KomPos2;
private int P_Rand;
private int P_Breite;
private int P_Hoehe;
private int P_X;
private int P_Y;
private int AbsS�ulenBreite;
private int Max_Farbe;
private int y_VersatzBeschr;
private int MaxWert;
private int AktWert;
private int MaxSaeulenHoehe;
private int AktFarbIndex;
private int Bod1x;
private int Bod2x;
private int Bod3x;
private int Bod4x;
private int Bod5x;
private int Bod6x;
private int Bod7x;
private int Bod1y;
private int Bod2y;
private int Bod3y;
private int Bod4y;
private int Bod5y;
private int Bod6y;
private int Bod7y;
private Color SaeulenFarbe;
private Color Akt_Farbe;
private Color Farbe[];
private Color HGFarbe[];
private Color BeschrFarbe;
private int Rand[];
//private int Horny[];
private String Numbers;
private String Legend;
private String myLink;
private String AktWertStr1;
private String AktWertStr2;
private URL myURL;
private boolean BeschrJN;
private boolean Mouse;
     public void start() {
Farbe = new Color[13];
Farbe[1] = str2col("CCFFFF");
Farbe[2] = str2col("66FFFF");
Farbe[3] = str2col("00FFFF");
Farbe[4] = str2col("CCFF00");
Farbe[5] = str2col("66FF00");
Farbe[6] = str2col("00FF00");
Farbe[7] = str2col("CCFFCC");
Farbe[8] = str2col("FFFF66");
Farbe[9] = str2col("FFFF00");
Farbe[10] = str2col("FFCC00");
Farbe[11] = str2col("FF6600");
Farbe[12] = str2col("FF0000");
HGFarbe = new Color[4];
HGFarbe[1] = Color.white;
HGFarbe[2] = Color.gray;
HGFarbe[3] = Color.black;
Max_Farbe = DF("BGCOLOR", HGFarbe);
Max_Farbe = 12;
Max_Farbe = DF("COLOR", Farbe);
Mouse = false;
myLink = getParameter("LINK");
if(myLink != null) {
Mouse = true;
BeschrJN = true;
Legend = getParameter("HIDENUMBERS");
if(Legend != null) {
BeschrJN = false;
Breite = getSize().width;
Hoehe = getSize().height;
Hoehe_diagramm = Hoehe - 50;
Numbers = getParameter("NUMBERS");
Legend = getParameter("LEGEND");
if(Legend == null) {
Legend = Numbers;
AnzSaeulen = 0;
MaxWert = 0;
AktKomPos1 = 0;
if(Numbers != null) {
do
KomPos1 = Numbers.indexOf(",", AktKomPos1);
if(KomPos1 < 0) {
break;
AnzSaeulen = AnzSaeulen + 1;
AktWertStr1 = Numbers.substring(AktKomPos1, KomPos1);
try {
AktWert = Integer.parseInt(AktWertStr1);
catch(NumberFormatException numberformatexception) {
AktWert = 0;
if(AktWert > MaxWert) {
MaxWert = AktWert;
AktKomPos1 = KomPos1 + 1;
while(KomPos1 > 0); {
Rand = new int[AnzSaeulen + 1];
//Horny = new int[AnzSaeulen + 1];
private Color str2col(String s)
int k = Integer.decode("0x" + s.substring(0, 2)).intValue();
int l = Integer.decode("0x" + s.substring(2, 4)).intValue();
int i1 = Integer.decode("0x" + s.substring(4, 6)).intValue();
return new Color(k, l, i1);
private int DF(String s, Color acolor[])
Numbers = getParameter(s);
if(Numbers != null)
AktKomPos1 = 0;
Max_Farbe = 0;
do
KomPos1 = Numbers.indexOf(",", AktKomPos1);
if(KomPos1 < 0) {
break;
Max_Farbe = Max_Farbe + 1;
if(Max_Farbe == acolor.length) {
break;
AktWertStr1 = Numbers.substring(AktKomPos1, KomPos1 + 1);
acolor[Max_Farbe] = str2col(AktWertStr1);
AktKomPos1 = KomPos1 + 1;
while(KomPos1 > 0);
return Max_Farbe;
public void mousePressed(MouseEvent mouseevent)
public void mouseReleased(MouseEvent mouseevent)
public void mouseEntered(MouseEvent mouseevent)
public void mouseExited(MouseEvent mouseevent)
public void mouseClicked(MouseEvent mouseevent)
int i1 = mouseevent.getX();
int j1 = mouseevent.getY();
if(Mouse)
int l = 0;
for(int k = 1; k <= AnzSaeulen; k++)
if(i1 >= Rand[k] && i1 <= Rand[k] + AbsS�ulenBreite && Mouse){
l = k;
if(l > 0){
NewURL(FrontFarbe(l));
stop();
start();
public String FrontFarbe(int SaeulenNr)
int index1=0;
     int index2;
     String AktuellFarbe = "";
     for(i=1;i<=SaeulenNr;i++) {
index2=Legend.indexOf(",",index1);
AktuellFarbe=Legend.substring(index1,index2);
index1=index2+1;
     return AktuellFarbe;
public void NewURL(String k)
boolean flag = true;
int l = myLink.indexOf("*");
int i1 = myLink.length();
if(l > -1){
myLink = myLink.substring(0, l) + k + myLink.substring(l + 1, i1);
try {
myURL = new URL(getDocumentBase(), myLink);
catch(MalformedURLException malformedurlexception) {
showStatus("Malformed URL : " + malformedurlexception);
flag = false;
if(flag) {
getAppletContext().showDocument(myURL, "_self");
public void paint(Graphics g)
setBackground(HGFarbe[1]);
P_Rand = 50;
Breite_diagramm = Breite - P_Rand - 20;
AbsS�ulenBreite = Breite_diagramm / AnzSaeulen;
MaxSaeulenHoehe = Hoehe_diagramm - 20;
y_VersatzBeschr = 1;
P_Breite = AbsS�ulenBreite - 10;
P_Hoehe = 100;
P_X = 10;
P_Y = 10;
if(P_Breite < P_X) {
P_X = P_Breite;
P_Y = P_Breite;
g.setColor(HGFarbe[2]);
for(i = 1; i < Hoehe_diagramm / 20; i++) {
g.drawLine(40, i * 20, Breite_diagramm + 40, i * 20);
g.drawLine(40, i * 20, 40 - P_X * 3, i * 20 + P_Y * 3);
AktFarbIndex = 1;
AktKomPos1 = 0;
AktKomPos2 = 0;
for(i = 1; i <= AnzSaeulen; i++) {
KomPos1 = Numbers.indexOf(",", AktKomPos1);
AktWertStr1 = Numbers.substring(AktKomPos1, KomPos1);
try {
P_Hoehe = Integer.parseInt(AktWertStr1, 10);
catch(NumberFormatException numberformatexception) {
P_Hoehe = 0;
AktKomPos1 = KomPos1 + 1;
P_Hoehe = (P_Hoehe * MaxSaeulenHoehe) / MaxWert;
KomPos2 = Legend.indexOf(",", AktKomPos2);
AktWertStr2 = Legend.substring(AktKomPos2, KomPos2);
AktKomPos2 = KomPos2 + 1;
SaeulenFarbe = Farbe[AktFarbIndex];
g.setColor(SaeulenFarbe);
Bod2x = P_Rand;
Bod2y = Hoehe_diagramm - P_Hoehe;
Bod3x = Bod2x + P_X;
Bod3y = Bod2y - P_Y;
Bod4x = Bod3x + P_Breite;
Bod4y = Bod3y;
Bod5x = Bod2x + P_Breite;
Bod5y = Bod2y;
Bod6x = Bod5x;
Bod6y = Hoehe_diagramm;
Bod7x = Bod4x;
Bod7y = Hoehe_diagramm - P_Y;
Rand[i] = P_Rand;
//Horny[i] = Bod2y + P_Hoehe;
g.fillRect(Bod2x, Bod2y, P_Breite, P_Hoehe);
for(j = Bod2x; j <= Bod5x; j = j + 2){
g.drawLine(j, Bod2y, j + P_X, Bod3y);
g.setColor(SaeulenFarbe);
Akt_Farbe = SaeulenFarbe.darker();
g.setColor(Akt_Farbe);
for(j = Bod5y; j < Bod6y; j++){
g.drawLine(Bod5x, j, Bod4x, j - P_Y);
g.drawLine(Bod7x, Bod7y, Bod6x, Bod6y);
Akt_Farbe = SaeulenFarbe.darker();
//g.setColor(Akt_Farbe);
g.setColor(HGFarbe[3]);
if(BeschrJN) {
g.drawString(AktWertStr1, Bod2x+20, Bod2y - 10);
g.drawString(AktWertStr2, Bod2x+15, Hoehe_diagramm + 10 + 10 * y_VersatzBeschr);
P_Rand = P_Rand + AbsS�ulenBreite;
AktFarbIndex = AktFarbIndex + 1;
if(AktFarbIndex > Max_Farbe){
AktFarbIndex = 1;
//y_VersatzBeschr = y_VersatzBeschr + 1;
//if(y_VersatzBeschr > 3) {
// y_VersatzBeschr = 1;
addMouseListener(this);
and the html testpage:
<HTML>
<HEAD>
     <TITLE>
          BarChartDK - Java applet for bar chart
     </TITLE>
</HEAD>
<BODY TEXT="white" BGCOLOR="navy" LINK="#FFFF00" ALINK="#FFFF00" VLINK="#FFFF00">
     <H1>
          HTML-Page for bar chart Demo 
     </H1>
     <P>
     <CENTER>
          <applet code=BarChartDK.class name=BarChartDK width=700 height=350 VIEWASTEXT>
               <param name=numbers value="26,9,9,8,7,6,5,4,4,3,">
               <param name=legend value="L11,V10,S60,C54,R11,L13,G11,C17,1,D51,">
               <param name=color value="EEEEEE,FFFFCC,">
               <param name=bgcolor value="FFFFFF,FFFFFF,">
               <param name=link value="test.htm?F=*">
          </applet>
          <P>
          <TABLE BORDER=0 CELLSPACING="5">
          <TR><TD>
               param name=numbers value="26,9,9,8,7,6,5,4,4,3,"
          </TD></TR>
          <TR><TD>
               param name=legend value="L11,V10,S60,C54,R11,L13,G11,C17,1,D51,"
          </TD></TR>
          <TR><TD>
               param name=color value="EEEEEE,FFFFCC,"
          </TD></TR>
          <TR><TD>
               param name=bgcolor value="FFFFFF,FFFFFF,"
          </TD></TR>
          <TR><TD>
               param name=link value="test.htm?F=*"
          </TD></TR>
          </TABLE>
          <HR>
     </center>
</BODY>
</HTML>