System.out to file

Hi !
Could somebody tell me, how I can forward all System.out .println and System.err.println Messages from
my Java modules (EJB, Servlets) to differenet files respectively. Thanks.
Steve

antu wrote:
ok thanks, the problem is that the database is crashed and we lost a diskgroup which we couldn't recover from backup.
We backed up as copy all datafiles we could inside ASM out to filesystem but the current redo to open the database from filesystem.So you have lost the entire groups including current too right? You don't need the inactive ones. For the rcovery of current logs, follow this
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14191/recoscen.htm#i1006564
HTH
Aman....

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System.out logging

Hi,
I want to identify in which class of BI Beans does the logging of System.out is done. I want to customize the system.out logging, so that all such log entries move into my specified log file instead of server's system.out log file. Can any1 help?
Regards

2. The problem with the above solution is that myapp
has mulitple packages. This means that I have to
import the LogWriter to use it in any file that isnot
in the package where LogWriter resides.Why is that a problem?Maybe nuisance is a better word. It just seems like there should be a way to support a class which can be accessed (without using import) by all sub-packages of a given package.
Btw, Thanks for the other reference... I'm looking into it right now.
J

How can i put a system.out.println into txt file

i want to generate a txt file instead of system.out.println. for the output How can i do that and what code can i use for that??
Edited by: crystalarun on Oct 14, 2007 11:40 AM

suppose u ant output in "Output.txt"
then code can be
PrintStream out = new PrintStream(new FileOutputStream("Output.txt"));
System.setOut(out)

Redirecting system.out to a file

I want to have the output of these threads go to a file, which it is doing now, but the program is finishing before all the data is written to the file.
I had another idea that the threads could write to a shared stringbuffer and then when they have finished, i could write the contents of that stringbuffer to a file, but when do it tell it to write to the file. how can i tell when the threads are finished.
/*      12 Nov 2002
     Class extends PThread which extends Thread.
import Concurrency.*;
import java.io.*; //added to write output to a file
public class Exercise1 extends PThread{
     private static File theOutputFile;
     private static FileWriter fileWriterStream;
     private static int counter = 0;
     public Exercise1() {
          try {
               if(theOutputFile == null) {
                    theOutputFile = new File("output.txt");
                    fileWriterStream = new FileWriter(theOutputFile);
          }catch(IOException ioe){}
     public static void main(String[] args) throws IOException {
          System.out.println("Dave Casserly\n" +
                                   "Check the source folder for a file called output.txt\n" +
                                   "This contains the programs output.\n");
          Exercise1 thread1 = new Exercise1();
          Exercise1 thread2 = new Exercise1();
          thread1.start();
          thread2.start();
     //each thread will look at counter make sure its less than 1000,
     //get the current counter value and increment it
     //print it to screen
     //then increment the static counter
     public void run(){
          try {
               while(counter <= 1000) {
                    int count = counter;
                    count++;
                    counter++;
                    System.out.println("COUNT = " + count);                    //write to screen
                    fileWriterStream.write("COUNT = " + count + "\n");      //write to file
                    counter = count;
          }catch(IOException io){}
}//end of class

You need to join the main thread with the child threads.
Something like this:
Exercise1 thread1 = new Exercise1();
Exercise1 thread2 = new Exercise1();
thread1.start();
thread2.start();
thread2.join();
thread1.join();Or something.

Large file read in, system out error!

the following method simply reads 6MB text file by each line.
After reading a line, separate the line with '\t', and obtain 2 tokens.
After getting 2 tokens, synthesis the 2 tokens into another string token.
Sythesized token is displayed with System.out.println().
However, I can't have all contents from the input file, and I can't dispaly all of them in monitor screen, either.
What's wrong with my code?
PS: each line of the input file is structured by "key\tcontent\n" , and the number of lines is 400000.
===========
public void makeDictionary(){
String line;
try{
BufferedReader in = new BufferedReader( new FileReader(filePath));
while( (line = in.readLine()) != null ){
String key;
String content;
int index = line.indexOf('\t');
key = line.substring(0, index);
content = line.substring(index+1, line.length());
System.out.println( key + "\t" + content );
System.out.flush();
in.close();
catch( Exception e){}
}

Thank you for your answer.
I can't enough thank you.
Actually, I used try..catch structure for my code, however I didn't get any message from catch block. In addition to this, the process didn't stop; in other word, the process was going on while doing nothing. I monitored the utilizaton of CPU and memory. The utilization of CPU was 100%, but after a while, it was 0%, even though process was still alive. The state which the process was doing nothing continued forever.
Frankly speaking, I used this code for constructing my own data structure from a large text file. While debugging my code, I realized that the method, readLine() of BufferedReader class didn't load all the data of the input file, so I made the code for testing.
Anyway, I am just fully depending on your answer. Please help me!!!!
Your quick response will be appreciated.

Redirect system.out.println() to a file

hi all,
how can i redirect all the console prints to a txt file in java application? i have used system.out oftenly in many class throught the
application. is there any way to redirect all those console prints to a
txt file by converting or assigning the System.out stream to a stream for filewriter or
somthing like that, so that whenever system.out.println() is executed
the content is written to a file insted of on the console.
thanks in advance
Sojan

Actually,System.setOut(new PrintStream(new FileOutputStream("output.txt"), true));
System.setErr(System.out);since setOut wants a PrintStream and not just some OuputStream...

How does System.out.println(). Work inside src.zip file !

Hello guyz,
I was just wondering how System.out.println() worked so i opened up the src.zip file and checked the source code. But could not understand it. As written i remember
"out is an object encapsulated in the System class."
Thats ok. But i could not understand the code.
    public final static PrintStream out = nullPrintStream();
    private static PrintStream nullPrintStream() throws NullPointerException {
     if (currentTimeMillis() > 0) {
         return null;
     throw new NullPointerException();
    }Also when i ran the DJ Decompiler it decompiled it to this:
public class One
     public static void main(String args[])
          System.out.println("hello world");
import java.io.PrintStream;
public class One
    public One()
    public static void main(String args[])
        System.out.println("hello world");
}Also, why does it need to import PrintStream ?

Peter__Lawrey wrote:
I was just wondering how System.out.println() worked so i opened up the src.zip file and checked the source code.This value is a place holder. This value is changed as soon as enough of the JVM is initialised for printing to work.
Also, why does it need to import PrintStream ? It doesn't, but it is used in the code so DJ is including it just in case.Sorry,
But i don't understand at all.

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:
        if (isTRACE_ENABLED()){
            try {
                setTrace_out_log(new PrintStream(
                          new BufferedOutputStream(
                                new FileOutputStream(props.getProperty("TRACE_OUTLOG_FILE")),128), true));
                System.setOut(getTrace_out_log());
                setTrace_err_log(new PrintStream(
                        new BufferedOutputStream(
                              new FileOutputStream(props.getProperty("TRACE_ERRLOG_FILE")),128), true));
                System.setErr(getTrace_err_log());
            } catch(IOException e) {
                e.printStackTrace();
        }This works file but... all system.out and system.err is redirected to same file... which is not what i want.
Example:
debug property for menu application = enabled
debug property for app 1 = disabled
debug property for app 2 = enabled
In above case i want to have 4 new files:
- menuapp_out
- menuapp_err
- app2_out
- app2_err
This doesn't work, the files are created but after starting app2, the print-statements for the menu application are alse redirected to the app_2_xxx files. And when i finish app2, i do not get any print-output anymore
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
Are there any (free) tools availabe to read/analyze the logfiles created by above tools?

How to open the server log file that displays messages of System.out.print

Hi,
I am working on a j2ee project. How can we access the default log file? I have put many System.out.println(..) method in different classes in order to get the program flow and to track the origin of the error.
I opened the a log file named "defaultTrace.0.trc" in usr\sap\J2E\JC00\j2ee\cluster\server0\log installation directory. Although it shows the ecxeptions, It is not showing the messages that i have written to console with the help of System.out.println(..) method.
Can anybody tell me the location of the log file where i can find my messages sent through System.out.println(..) function?
Regards,
Sudheesh...

System.out.println goes to console, which is not a file... This whole thing is much easier if you use standard logging:
http://help.sap.com/saphelp_nw04/helpdata/en/d2/5c830ca67fd842b2e87b0c341c64cd/frameset.htm

System.out.println in jar files

hi i have created by jar file all works fine it is a swing application and is some places for debugging i have used System.out.println but when run my jar file and it should print out somthing o System.out.println it dose not how do i get this to work... if it can on windows.
thanks

Previous is correct, but not always the easiest.
Sysouts go to the java console. In IE, View / Java Console. In netscape, Tools / Web Development / Java Console.

System.out.println in which log file

          We are using weblogic 51 server.
          We have System.out.println's in the servlets but don't see
          it in any log file. Which log file would/should
          it go to.


If you are running a shell script (not as as service) you will see it in
          that shell window, if you run it without a console window (service), you
          usually see nothing.
          If you are using a third party tool to run the server as a service (e.g.
          ServiceMill for Win2k/NT) you usually can set files where you would like
          your output to be redirected.
          If you run the server as a service and don't have this option you can do
          it yourself by setting System.setErr / System.setOut, e.g. in a
          startup-class
          Daniel
          -----Ursprüngliche Nachricht-----
          Von: smita [mailto:[email protected]]
          Bereitgestellt: Mittwoch, 6. Juni 2001 18:54
          Bereitgestellt in: servlet
          Unterhaltung: System.out.println in which log file
          Betreff: System.out.println in which log file
          We are using weblogic 51 server.
          We have System.out.println's in the servlets but don't see
          it in any log file. Which log file would/should
          it go to.

System.out and System.err to files

Hi !
Could somebody tell me, how I can forward all System.out.println and System.err.println Messages from
my Java modules (EJB, Servlets) to different files respectively.
Thanks
Steve

I think you could create PrinStreamS from your desired output files and then use System.setOut(<...>) and System.setErr(<...>). Place this code in a servlet that you load at startup...

System.out/err log file redirection

Hi,
Do u know if System.out/err are redirected in
a log file with Oracle 9ias 9.0.4 (Production Release) ?
If yes, which one ?
Thanks

You may be looking for the stdout/stderr process output.
Almost all components in Oracle Application Server 10g
(9.0.4) are managed (at the process level) by OPMN. To
preserve the stdout and stderr of every process, all
processes started by OPMN have their stdout/stderr
redirected to a file (one file for each running process).
This file is sometimes referred to as the "console log".
Console logs are located in $OH/opmn/logs and have a
filenames containing '~' chars. Identifying which
console log file is associated with which process
should be intuitive.
When a process terminates and is replaced by a new
process, console log output from the previous process is
preserved and the replacement process appends to the
end of the console log file.

URGENT : System.out AND OACorexx files! log files more than 4Giga

Hi all,
I have a client with a custom done in OAF where there are a lot of System.out... and System.err "logs" print.
The problem is that these logs are written in OACorexxx files under Apache/Jserv/logs/jvm directory: in only 4 days more than 4G size!
Is possible to disable this logs?
Thanks,
Carlo

Calling java.lang.System.setOut(PrintStream out) will allow you to redirect the System.out calls. You can direct them to null.
--Shiv

System.out.println and log file

          I am developing jsp on BEA Weblogic 613 on Solaris.
          What if i run the following statement
          System.out.println("Hello world");
          I understand that Hello World will be printed to the server console. I do not
          have access to this console. Is there any log file or temporary log file it gets
          sent to? If not, is there anyway to redirect output from the console to someplace
          else?
          Thanks!


You can redirect console output for stdout on Solaris like so:
          java weblogic.Server > consoleoutput.txt
          then in a terminal window you can see whats going on with
          tail -f consoleoutput.txt
          Sam
          Brian Schneider wrote:
          > I am developing jsp on BEA Weblogic 613 on Solaris.
          >
          > What if i run the following statement
          > System.out.println("Hello world");
          >
          > I understand that Hello World will be printed to the server console. I do not
          > have access to this console. Is there any log file or temporary log file it gets
          > sent to? If not, is there anyway to redirect output from the console to someplace
          > else?
          >
          > Thanks!

System.out to file

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