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Re: how do you block the GUI repaints?

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On 2018-05-23 16:48, Eric Douglas wrote:
> On Wednesday, May 23, 2018 at 10:31:07 AM UTC-4, Daniele Futtorovic wrote:
>>>
>>
>> The "squares" appear because the font you're using does not have any
>> glyph for the codepoints that you're trying to show.
>>
>> As for the rest... Good Luck!
> 
> I tried setting the JTextArea font to Lucida Sans Unicode.  If that doesn't have a glyph for the characters I don't know what would.  

None will. Because those aren't characters (or more precisely, the
byte-encoded representation of characters).

> As I'm just reading files in as byte[] array I was wondering if I need to do some kind of character encoding conversion to create a displayable String, or if I just need to call a method to test for characters that won't display and convert to a hex view.

You'll have to know beforehand what encoding your text file is in. There
is, to my knowledge, no general-purpose, reliable way of determining the
encoding of an arbitrary file (including whether it's text or not).

Elsethreads, you talk about "JTextArea's character encoding". JTextArea
does not have a character encoding. Once a String is in the Java
runtime, it's a String, period. No character encoding. Character
encoding has to happen at the boundary of the Java runtime, so to speak,
when you are reading external data in (in this case, your file).

I would suggest using java.nio.charset.CharsetDecoder-s in combination
with the java.nio.channels.FileChannel instance you can obtain from the
RandomAccessFile instance (because both work with
java.nio.ByteBuffer-s). If you're unfamiliar with character
(en|de)coding or Java NIO buffers, I would strongly suggest you look up
a tutorial on those.

-- 
DF.

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Thread

how do you block the GUI repaints? Eric Douglas <e.d.programmer@gmail.com> - 2018-05-22 10:59 -0700
  Re: how do you block the GUI repaints? Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2018-05-22 13:22 -0500
    Re: how do you block the GUI repaints? Eric Douglas <e.d.programmer@gmail.com> - 2018-05-22 13:00 -0700
      Re: how do you block the GUI repaints? Eric Sosman <esosman@comcast-dot-net.invalid> - 2018-05-22 16:29 -0400
        Re: how do you block the GUI repaints? Eric Douglas <e.d.programmer@gmail.com> - 2018-05-22 13:51 -0700
          Re: how do you block the GUI repaints? Martin Gregorie <martin@mydomain.invalid> - 2018-05-22 21:41 +0000
          Re: how do you block the GUI repaints? Eric Sosman <esosman@comcast-dot-net.invalid> - 2018-05-22 18:03 -0400
            Re: how do you block the GUI repaints? Andreas Leitgeb <avl@logic.at> - 2018-05-22 22:22 +0000
              Re: how do you block the GUI repaints? Eric Douglas <e.d.programmer@gmail.com> - 2018-05-23 07:55 -0700
                Re: how do you block the GUI repaints? Eric Sosman <esosman@comcast-dot-net.invalid> - 2018-05-23 11:06 -0400
                Re: how do you block the GUI repaints? Eric Douglas <e.d.programmer@gmail.com> - 2018-05-23 08:19 -0700
  Re: how do you block the GUI repaints? Eric Sosman <esosman@comcast-dot-net.invalid> - 2018-05-22 14:43 -0400
    Re: how do you block the GUI repaints? Eric Douglas <e.d.programmer@gmail.com> - 2018-05-22 13:20 -0700
      Re: how do you block the GUI repaints? Daniele Futtorovic <da.futt.news@laposte.net> - 2018-05-22 22:47 +0200
        Re: how do you block the GUI repaints? Eric Douglas <e.d.programmer@gmail.com> - 2018-05-22 13:58 -0700
          Re: how do you block the GUI repaints? Daniele Futtorovic <da.futt.news@laposte.net> - 2018-05-23 04:30 +0200
            Re: how do you block the GUI repaints? Eric Douglas <e.d.programmer@gmail.com> - 2018-05-23 05:54 -0700
              Re: how do you block the GUI repaints? Daniele Futtorovic <da.futt.news@laposte.net> - 2018-05-23 15:58 +0200
                Re: how do you block the GUI repaints? Eric Douglas <e.d.programmer@gmail.com> - 2018-05-23 07:26 -0700
                Re: how do you block the GUI repaints? Daniele Futtorovic <da.futt.news@laposte.net> - 2018-05-23 16:30 +0200
                Re: how do you block the GUI repaints? Eric Douglas <e.d.programmer@gmail.com> - 2018-05-23 07:48 -0700
                Re: how do you block the GUI repaints? Daniele Futtorovic <da.futt.news@laposte.net> - 2018-05-23 18:46 +0200
                Re: how do you block the GUI repaints? Eric Douglas <e.d.programmer@gmail.com> - 2018-05-23 10:51 -0700
                Re: how do you block the GUI repaints? Daniele Futtorovic <da.futt.news@laposte.net> - 2018-05-23 22:35 +0200

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