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System.setOut

 
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Québec
Guest
PostPosted: Sat Nov 22, 2003 10:28 pm    Post subject: System.setOut Reply with quote


Hi, I was sure this one would be simple :-)

The output stream does not comes back to the console.

APrintStream ps = new APrintStream(new FileOutputStream(registered));
System.setOut(ps);
System.out.println("AB-09-RTY-099");
ps.checkError();
ps.close();
System.setOut(System.out);
System.out.println("The console is back.");
JOptionPane.showMessageDialog(null,
"well well")

Jean Pierre


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Jonas Kongslund
Guest
PostPosted: Sat Nov 22, 2003 10:50 pm    Post subject: Re: System.setOut Reply with quote


Québec wrote:
Quote:
The output stream does not comes back to the console.

APrintStream ps = new APrintStream(new
FileOutputStream(registered));

Add this line:
OutputStream savedOut = System.out;

Quote:
System.setOut(ps);
System.out.println("AB-09-RTY-099");
ps.checkError();
ps.close();

Replace this line

Quote:
System.setOut(System.out);

with this line
System.setOut(savedOut);

Quote:
System.out.println("The console is back.");
JOptionPane.showMessageDialog(null,
"well well")

--
Jonas Kongslund

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Québec
Guest
PostPosted: Mon Nov 24, 2003 1:05 pm    Post subject: Re: System.setOut Reply with quote


Your solution did not work. I replaced aprintStream with a system class
without success.

PrintStream ps = new APrintStream(new FileOutputStream(registered));
System.setOut(ps);
ps.println("AB-09-RTY-099");
ps.checkError();
ps.close();
System.setOut(System.out);

"Jonas Kongslund" <dont (AT) mail (DOT) me.at.all> wrote

Quote:
Québec wrote:
The output stream does not comes back to the console.

APrintStream ps = new APrintStream(new
FileOutputStream(registered));

Add this line:
OutputStream savedOut = System.out;

System.setOut(ps);
System.out.println("AB-09-RTY-099");
ps.checkError();
ps.close();

Replace this line

System.setOut(System.out);

with this line
System.setOut(savedOut);

System.out.println("The console is back.");
JOptionPane.showMessageDialog(null,
"well well")

--
Jonas Kongslund



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Anthony Borla
Guest
PostPosted: Mon Nov 24, 2003 1:39 pm    Post subject: Re: System.setOut Reply with quote

"Québec" <jpda (AT) vidn (DOT) ca> wrote

Quote:

Your solution did not work. I replaced aprintStream with a system class
without success.

PrintStream ps = new APrintStream(new
FileOutputStream(registered));
System.setOut(ps);
ps.println("AB-09-RTY-099");
ps.checkError();
ps.close();
System.setOut(System.out);


The example I posted works perfectly well. Here is a snippet:

PrintStream ops = System.out;
...
System.setOut(nps);
...
nps.close();
...
System.setOut(ops);

I hope this helps.

Anthony Borla



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Chris Smith
Guest
PostPosted: Mon Nov 24, 2003 4:51 pm    Post subject: Re: System.setOut Reply with quote
Québec wrote:
Quote:
Your solution did not work. I replaced aprintStream with a system class
without success.

PrintStream ps = new APrintStream(new FileOutputStream(registered));
System.setOut(ps);
ps.println("AB-09-RTY-099");
ps.checkError();
ps.close();
System.setOut(System.out);

Huh? That's the same code you started out with! Did you try Jonas'
suggestion at all?

--
www.designacourse.com
The Easiest Way to Train Anyone... Anywhere.

Chris Smith - Lead Software Developer/Technical Trainer
MindIQ Corporation

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Tor Iver Wilhelmsen
Guest
PostPosted: Mon Nov 24, 2003 5:07 pm    Post subject: Re: System.setOut Reply with quote
"Québec" <jpda (AT) vidn (DOT) ca> writes:

Quote:
System.setOut(System.out);

You need to learn that the above statement in effect is a noop.

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Québec
Guest
PostPosted: Mon Nov 24, 2003 6:07 pm    Post subject: Re: System.setOut Reply with quote
Quote:
You need to learn that the above statement in effect is a noop.
Oops! ...what's a noop?


Quote:
Did you try Jonas' suggestion at all?
Yes. It seems one has to 'save' the current output 'before' changing it. I

dont see why but it works.


PrintStream ops = System.out; === save the output

PrintStream fps = new APrintStream(new FileOutputStream(registered));
System.setOut(fps);
fps.println("AB-09-RTY-099");
fps.checkError();
fps.close();

System.setOut(ops); === get it back



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