Re: Getting Applet into Flash ROM?

Hi Mark!

I checked out the problem with the encoding. One can also use Base64
encoding, wich is a kind of standart for doing such things.
Here is a link with java code examples:
http://mindprod.com/jgloss/base64.html

Thanks once again for your help!

Regards,
Anguel

Mark Wolforth wrote:

>
> Hi Anguel,
>
> Good point.  Converting the original binary data to a string can have 
> a few pitfalls.  Java does lots of fancy character set conversions to 
> make internationalization easy, but these can mess things up when all 
> you want is the raw data.  I went through a lot of trial and error to 
> find something that worked.  For example, you can do without the 
> try{}catch{} block around the string declaration I posted before - it 
> was left over from attempts to use different Java character encoding.
>
> What I did in the end was use the default encoding and escape the 
> characters that don't exist.  A code snippet for doing this, where 
> "out" is some output stream and "in" is the input stream would be:
>
>    c = in.read();
>    while (c != -1) {
>        // Things that need to be escaped
>        if (c == '"') {
>            out.write ('\\');
>            out.write ('"');
>        } else if (c == '\\') {
>            out.write ('\\');
>            out.write ('\\');
>        } else if (c == '\n') {
>            out.write ('\\');
>            out.write ('n');
>        } else if (c == '\r') {
>            out.write ('\\');
>            out.write ('r');
>        } else {
>            // Escape characters that don't fit in
>            // ISO8859-1 encoding.
>            if (((c & 0x0FF) >= 128) && ((c & 0x0FF) <= 159)) {
>                out.write ('\\');
>                out.write ('u');
>                out.write ('0');
>                out.write ('0');
>                temp = (c & 0x0F0) >> 4;
>                if (temp < 10) {
>                    out.write (temp + '0');
>                } else {
>                    out.write (temp - 10 + 'A');
>                }
>                temp = c & 0x0F;
>                if (temp < 10) {
>                    out.write (temp + '0');
>                } else {
>                    out.write (temp - 10 + 'A');
>                }
>            } else {
>                out.write ((byte)(c & 0x0FF));
>            }
>        }
>        c = in.read();
>    }
>
> There may be a better way to do it, but the above has worked fine for 
> me for a while.
>
> Mark.
>
> zer0flag wrote:
>
>> Hi Mark!
>>
>> Thank you very much for your help! I like this approach! Maybe it's 
>> not as elegant and efficient as the solution in assembler, but the 
>> filesystem is built only once at startup so it should be enough for 
>> most of us.
>> I just wanted to ask you how you put the string into Java. Just copy 
>> and paste from a text editor or do I have to make some special 
>> preparations? What about encoding? Thanks once again for your help!
>>
>> Best regards,
>> Anguel
>>
>> Mark Wolforth wrote:
>>
>>>
>>> Hi,
>>>
>>> I've done this entirely in Java by storing the data as a string and 
>>> then using the getBytes() method to extract the bytes back.  A 
>>> String is the most data efficient way to do this in Java since all 
>>> other array types add code to set up the array itself.  As an 
>>> example, you could have a class like:
>>>
>>> class Web_applet {
>>>    public byte[] JARfile;
>>>    public web_applet() {
>>>    try {
>>>        JARfile = "­-Þd;o³õÃݶ¡¸Ç6ï´ÍÀ»l'bض\u0".getBytes();
>>>    } catch (Throwable _) {}
>>>    }
>>> }
>>>
>>> and then extract the data with something like:
>>>
>>> private static final void CreateAppletJAR() {
>>>    FileOutputStream jarfile;
>>>    try {
>>>        jarfile = new FileOutputStream (new File("Applet.jar"));
>>>        Web_applet applet = new Web_applet();
>>>        jarfile.write (applet.JARfile, 0, applet.JARfile.length);
>>>        jarfile.close();
>>>    } catch (Throwable t) {
>>>        System.out.println ("Error creating web applet JAR file.");
>>>        System.out.println (t);
>>>    }
>>> }  // End of CreateAppletJAR()
>>>
>>> Watch out for the 64K class limit size.  If you hit up against this 
>>> you'll need to create multiple classes to hold your data.
>>>
>>> Good luck,
>>> Mark.
>>>
>>>
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>>
>
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