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.

Similar Messages

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)

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...

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!

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.

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.println("....") doesn't show by run invoiceMail.jar on command

Hi,
I tried to run invoiceMail.jar and expected print out System.out.println("....") on command line ,
I works on java -jar invoiceMail.jar -date 08/08/2008, but not invoiceMail.jar -date 08/08/2008
How to do that?
Thanks
C:\Documents and Settings\fsze88\桌面>invoiceMail.jar -date 08/08/2008
C:\Documents and Settings\fsze88\桌面>java -jar invoiceMail.jar -date 08/08/2008
args[0] : -date
args[1] : 08/08/2008
email sent 關於 2008年8月8日 前仍未收到的 Invoice

fsze88 wrote:
run java -jar invoiceMail.jar -date 08/08/2008 on prompt command, it gave me output by System.out.println("....");
args[0] : -date
args[1] : 08/08/2008
email sent 關於 2008年8月8日 前仍未收到的 Invoicerun invoiceMail.jar -date 08/08/2008 on prompt command, it gave me nothing.
C:\Documents and Settings\fsze88\桌面>invoiceMail.jar -date 08/08/2008
C:\Documents and Settings\fsze88\桌面>java -jar invoiceMail.jar -date 08/08/2008
args[0] : -date
args[1] : 08/08/2008
email sent 關於 2008年8月8日 前仍未收到的 InvoiceHope this clear..
Thank you!That is how it is and that's how it's supposed to be.

Java Beans System.out.println Log file

Helllo,
I have Forms 11.1.2 installed on linux. I developed a java bean and put some System.out.println() statements. The bean itself is working but where do i look for the debug statement logs that i am generating via System.out.println() statements.
Please let me know if you need more information, I will post asap.
thanks in advance,
Prasad.

Prabodh,
thanks, added the following line to the implementation class in java bean:
private final static Logger logger = Logger.getLogger(MyBean.class.getName());
and then in the init() method, i put
logger.info("Prasad .... in init);
Does this automatically goes into weblogic managed server WLS_FORMS (in my case) standard out?
Or do i need to do anything else, i know weblogic comes up with its own diagnostic logging and is famous for supressing other loggers.... just want to run this by you as well.
thanks,
Prasad,

32-bit JDK 7 System.out.println not working in IDE

Hi folks,
I have a 64-bit Windows 7 OS.
Due to 3rd party library/jar dependencies, i had to install the 32-bit Java JDK 1.7 and Eclipse IDE.
I also installed NetBeans.
So i have a 64-bit OS and am running 32-bit Java JDK/JRE & IDEs.
The problem I am having is that my program's System.out.println("...") statements are not outputting strings to either IDE debug console.
Executing the compiled program from a command line/prompt produces the expected string output.
The basic "Hello, World" program is enough to cause this behaviour to start occurring.
I have not manually / intentionally changed any IDE-specific Debug Console or Windows environment settings.
One caveat: This same environment has worked successfully in the past ?! Yes, this is one of those "..it worked last week & yesterday and today it isn't and i swear i didn't do anything..." issue.
Thoughts ?

Thanks for the reply.
The 64-bit versions of Java & Eclipse were installed first.
When i discovered I had to use the 32-bit versions, i un-installed the 64-bit ones & installed the 32-bits.
Even after that initial un-install 64-bit/install 32-bit process, it was working.
I have also been installing the Windows 7 64-bit OS updates when i am informed of them.
I'm not sure if any of these would affect how the Eclipse / NetBeans IDEs behave.
Behaviour has been inconsistent.
Initially it was always working.
But over the past several days, it has been working less and less.
I don't have any large data structures.
This isn't a large complicated program, couple hundred lines, so i highly doubt that i'm doing anything to the resources, but something has changed.
The main project I am working on takes command line parameters, does some initial processing, produces output using System.out.printlns [SOP] then depending on the parameters, branches into 2 different processing paths, let's call them A & B. Each of these processing paths also use SOPs. When i run the program in the IDE going thru path A, sometimes the initial SOP statements will work and the SOP statements specific to path A will also work. If i immediately change the parameters to go thru path B & re-run it, not even the initial SOP statements before the branching decision work.
I've tried doing System.flush()s too - no affect.
I haven't tried the re-direction option to a file option you mentioned yet.
It always works from a command prompt - that is telling me that the Java SOPs are working properly, correct ?
Inside an Eclipse or NetBeans IDE, SOP output to the debug console is inconsistent.
Running from a command prompt, the SOPs always work.
It'd help to know if this an IDE issue, a Java issue, a Windows 7 issue so i can narrow down where to try and correct the situation.
I have a Windows XP VM set up, i'll try running the program there and see if there's a difference.
Thanks for your reply.

System.out.println() problem

When I use operator + for concatenate the following Strings
md.getDriverName() + md.getDriverVersion()
as follow in a try block:
try {
con = DriverManager.getConnection(sourceURL,user,pass);
md = con.getMetaData();
System.out.println(md.getDriverName().+md.getDriverVersion());
when I have tried run java -cp postgresql.jar errors message appers :
Exception in thread "main" java.lang.NoClassDefFoundError: while resolving class: conx
at java.lang.VMClassLoader.transformException(java.lang.Class, java.lang.Throwable) (/usr/lib/libgcj.so.6.0.0)
at java.lang.VMClassLoader.resolveClass(java.lang.Class) (/usr/lib/libgcj.so.6.0.0)
at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.6.0.0)
at java.lang.Class.forName(java.lang.String, boolean, java.lang.ClassLoader) (/usr/lib/libgcj.so.6.0.0)
at gnu.java.lang.MainThread.run() (/usr/lib/libgcj.so.6.0.0)
Caused by: java.lang.ClassNotFoundException: java.lang.StringBuilder not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:postgresql.jar,file:./], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
at java.net.URLClassLoader.findClass(java.lang.String) (/usr/lib/libgcj.so.6.0.0)
at java.lang.ClassLoader.loadClass(java.lang.String, boolean) (/usr/lib/libgcj.so.6.0.0)
at java.lang.ClassLoader.loadClass(java.lang.String) (/usr/lib/libgcj.so.6.0.0)
at java.lang.Class.forName(java.lang.String, boolean, java.lang.ClassLoader) (/usr/lib/libgcj.so.6.0.0)
But when I have used netBeans IDE v 4.0 it works fine.
Might somebody help me for solve it.

Caused by: java.lang.ClassNotFoundException: java.lang.StringBuilder not found in
gnu.gcj.runtime.SystemClassLoader{urls=[file:postgresql.jar,file:./],
As I noted in your other post, your computer is configured to use gnu.gcj, not Sun's Java - and it appears that gcj doesn't have the StringBuilder class; it was added to Sun Java in Java 5.

General question regarding System.out.println

Just for my knowledge fellas,
When you have a few System.out.println's in your code, what happens to the lines written to standard out when you run your application from the executable jar file? I know if you run your app in cmd prompt, then the lines are outputted to the cmd screen, and in Netbeans, in the output section...but where do those lines go when you run the app as an executeable? Are they still written, but there's nothing to show the written lines?
Thanks.
...DJVege...

Just for my knowledge fellas,
When you have a few System.out.println's in your
code, what happens to the lines written to standard
out when you run your application from the executable
jar file?They get written to standard out, usually the console... doesn't matter at all if it's a JAR or not.
I know if you run your app in cmd prompt,
then the lines are outputted to the cmd screen, and
in Netbeans, in the output section...but where do
those lines go when you run the app as an
executeable?cmd screen. Or Java console if you run javaw.

Is there a way to make system.out.println() scroll down as it goes?

I am writing a program where I want to be able to read what's printed out in the console of my IDE through System.out.println() as the program runs/after the program runs. However, right now I run the program, the message prints out, and then when I go to read it the scroll bar is all the way up so I can see only the top of the print-out (the first thing printed out). Is there any way I can get the console to scroll along with the text, kind of like floating boxes you see on various websites for various reasons? In other words, can I get it so that when I look in the console at any given moment of the program running, I am looking at the newest text printed out (the text at the bottom of the "page")? Thank you!

That would be an IDE problem and not a Java one. You could redirect output into a text file so you can read at your leisure and scroll up and down as much as you like.

System.out.println in Web Dynpro Java

I call System.out.println in some components in web dynpro java. But I cannot find the standard console output file of SAP J2EE Engine. Anyone know where is the location of standard output file?

Thanks Deepak. Your link blog is working.
Sreeni: I cannot find a start-up log file. Could you please tell me the real path?
Edited by: Nuttakorn Boonthamtanarung on Apr 1, 2010 6:58 AM

Where to see the System.out.println() messages

I deploy my application in Oracle9ias . I have some System.out.println() statements in java class files.
When I run the application I need to know where I can see those println() statements.

The Member Feedback forum is for suggestions and feedback for OTN Developer Services. This forum is not monitored by Oracle support or product teams and so Oracle product and technology related questions will not be answered. We recommend that you post this thread to the Application Server-General forum. The URL is:
Oracle Application Server - General

Where to see the System.out.println statements on soa server.

Hi,
I have generated some proxy classes in my jdeveloper. And I have deployed that project to the admin server on my soa_domain.
Now my java files have some System.out.println statements. I want to see those values.
Can anyone please let me know where I can see those statements on server.
What s the file name where i can see.
do i have to enable some debigging on the server. if yes then for what level i need to enable the log at what level.
Thanks
Anoop

Hi,
System.out.println is not really a good way to debug in weblogic... If you didn't configure where the stdout will go those messages can end up going nowhere...
I suggest you use one of these...
This will go to the soa*diagnostic logs... for example DOMAIN_HOME/servers/soa_server1/soa_server1-diagnostic.log...
import java.util.logging.Level;
import java.util.logging.Logger;
import oracle.fabric.logging.LogFormatter;
    private static final Logger soa_logger = Logger.getLogger("oracle.soa.Logger");
    static {
        LogFormatter.configFormatter(soa_logger);
        soa_logger.log(Level.INFO, message);
        soa_logger.log(Level.INFO, message, t);or
This will go to the server logs... for example DOMAIN_HOME/servers/soa_server1/soa_server1.log...
import weblogic.logging.NonCatalogLogger;
    private static NonCatalogLogger weblogic_logger = new NonCatalogLogger("SomeMeaningfulNameHere");
        weblogic_logger.notice(message);
        weblogic_logger.notice(message, t);Usually info and notice will go to the logs by default, you can try with higher levels (error,warning) as well or you can tweek the server debug level to use lower levels...
Cheers,
Vlad

System.out.println in jar files

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