Replace System.out and System.err

Hi there,
i got an Applet/Application Hybrid and i want to replace the System.out and System.err - Stream with my personal Streams.
When started as an Application it shell be given out to a file and when started as an Applet it shell be given out to the current HTML-Document...
But how do i realize that with the Applet. The thing with the Application and the file works fine, so don�t worry about that..
so in short my question is:
how can i replace/modify the System.out and System.err Streams in a way so that the output will be given the current HTML-Document when started as an Applet?
thx anyway
cu Errraddicator

i know this method, but i don�t know how to make a PrintStream that gives the input to the HTML-Document...
excuse me if my kind of expressions were not so excactly...
thx anyway
cu Errraddicator

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How to capture System.err and System.out in a method?

Is there some way to capture everything that is sent to System.err or System.out and have it instead go to e.g. a method as a String?
The reason I want to do is this: I am invoking some method from a class that sends output to System.err and System.out but while that method is run, I want everything that goes to System.out or System.err to instead go to a String buffer or a Swing Scroll Pane.
What is the easiest way to do this?

I want everything that goes to System.out or System.err to instead go to a String buffer or a Swing Scroll Pane.Then maybe you should be searching (and then posting) in the Swing forum. Thats where I've seen this question asked and answered many times in the past.

System.out and System.err

Hi all,
This is a stupid newbie question, but I could not find the answer on the Web
site, so here goes: Where do System.out and System.err get written to? I'm
trying to deploy some plain-vanilla stateless session beans that do a bunch
of println() calls, but I can't see the output anywhere! The WebLogic
Console shows no messages, /myserver/weblogic.log has nothing interesting,
and there are no .log files anywhere that I can see. I even searched /tmp
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- danz

The simple answer to your questions are no and no.
I recently logged a problem with BEA WebLogic technical support regarding
this issue and their response is:
You have two choices. You can either use standard Java file i/o to write
your output to a file, or you can use our t3loggingservices to append
messages into the weblogic.log
The "jump point" for the logging services is at --
http://www.weblogic.com/docs51/classdocs/javadocs/weblogic/common/LogService
sDef.html
It is actually very easy to use -- after you import the proper packages into
your web application it is just as easy to use as System.out.println.
John J. Feigal Voice (651)766-8787 (main)
Sr. Technical Consultant (651)766-7249 (direct)
Ensodex, Inc. Fax (651)766-8792
4105 N. Lexington Ave., Suite 150 email [email protected]
Arden Hills, MN 55126 WebSite http://www.ensodex.com
"Jon Wynett" <[email protected]> wrote in message
news:[email protected]...
I'm running WebLogic as an NT Service. Is there any way to see the
System.out.println messages? Can they be redirected to the weblogic.log
file?
We were running through a DOS Window and saw all the messages, however we
ideally want to run Weblogic as a service.
"Rob Woollen" <[email protected]> wrote in message
news:[email protected]...
I'm guessing that you started the server with the .exe file on Windows.
If you're debugging with printlns, it's generally more conventient to
use the startWebLogic.sh or startWebLogic.cmd files to start the server
from a shell.
By default, you'll see stdout and stderr in the window.
-- Rob
Dan Zivkovic wrote:
Hi all,
This is a stupid newbie question, but I could not find the answer on
the
Web
site, so here goes: Where do System.out and System.err get written to?I'm
trying to deploy some plain-vanilla stateless session beans that do abunch
of println() calls, but I can't see the output anywhere! The WebLogic
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and found nothing of interest. What am I missing? Do I have toexplicitly
open a file for System.out and/or System.err? That doesn't soundright...
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System.out and System.err How to get to show up in log

Does anyone know if there is anyway to get System.out and System.err
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Write a wrapper class to redirect the std out to what ever stream you want.
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Temporarily routing System.out and System.err to a String

Hi everybody,
Does anyone know of a way to temporarily route System.out and System.err directly from the console into a String, then set it back to its default to the console? I know how to reroute to a text area:
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Too late to the party?
import java.io.*;
public class Redirection {
    public static void main(String[] args) {
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        ByteArrayOutputStream baos = new ByteArrayOutputStream();
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Rerouting System.out and System.err

Hi everybody,
I'm trying to make a small application with an agnostic back end that can print out its progress messages to either the console or a JTextArea, depending on whether the console front end or GUI front end is called. I originally created a small utility class that the agnostic back end extended, in which one could set a variable which told it to use the JTextArea or console. The solution seems a bit clumsy to me, though, so it crossed my mind; does anyone know if there is a way, in the main method of a program, to reroute System.out and System.err to a desired location?
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Console front end:
1. Start main
2. Create object for back end
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2. Create Object for back end
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Thanks for the explanation scphan,
In that case, I don't think that's exactly what I'm looking for.
To answer both your question and cotton's:
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I have 3 classes, Calculate, Console, and GUI.
Calculate is the back end of my application. Console is a front end class that allows the actions of Calculate to be run on the command line. GUI is a front end class that allows the actions of Calculate to be shown in a text area.
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Hi Everyone !!!
I could see that System.err is printing an output on the screen as like the System.out.
I can't understand what is System.err.
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System.err.println -> Sends the output to a standard error stream. Generally monitor.
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public class test
public static void main(String args[])
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System.err.println("Standard error stream message");
Compile the class.
Run the class
First Execution -
java test
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Standard error stream message
Second Execution -
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System.out.println() and System.err.println()

Can any one tell me the difference between System.out.println()
and System.err.println() ?

Can any one tell me the difference between
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and System.err.println() ?sends the output to the 'stderr' stream.
http://en.wikipedia.org/wiki/Standard_input

How does javaw (WinXP) threats System.err and System.out?

Hi, I just faced a problem which is most likely caused by the blocking of System.err.
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I'm sure about this, cause redirecting these streams had fixed my problem.
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Thanks a lot in advance.
Greetings Michael
The entry from the registry:
"C:\Programme\Java\jre1.6.0\bin\javaw.exe" -jar "%1" %*"

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Passing System.out/System.err as parameters

I'm sure there must be a simple answer to this that I'm just not seeing, suggestions please.
I have a method in a logging utility that takes either a PrintWriter or a Printstream parameter as a target for logging and a second method that closes the log.
In principle either System.out or System.err could be passed in either directly or wrapped in a PrintWriter.
In the closing method I want to determine if one of these two PrintStreams were passed and if so skip the close() operation so as not to lose connectivity to stdout or stderr.
In the case of the PrintStream parameter I can use an identity check and condition a boolean to control closing the file.
The problem is the PrintWriter, if the utility user wraps these PrintStreams.
1: As I understand it closing the PrintWriter will cause the underlying OutputStream to close.
2: Since it's a protected field the underlying OutputStream is not visible to me.
3: I don't wish to subclass PrintWriter if there's another way to solve the problem.
Any ideas?

Why don't you use a BufferedWriter() ?

One JVM with different system.out / system.err files

I have a menu application which allows me to launch different swingapps which runs inside one single JVM.
All applications have their own properties.file which is read and handled at the start of each application.
One property allows me to print all kind of system.err / system.out which i want to redirect to a specific file. This is implemented with following code:
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IMHO this is because the JVM only has 1 system.out and 1 system.err file. Is there some way to solve this?

I understand that i need to use java.util.logger (JUL) or Log4j
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Hello,
System.out and System.err both seem to direct regular and error output to the stdout. I have the following questions:
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2. Without using setErr(), errors go to stdout. My question is "Does Java hava a configuration file I can configue to direct regular output to stdout, but errors to a user-defined file such as errors.log?"
Thanks!

I see the stack trace in file err.txt:
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Replace System.out and System.err

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