Not getting System.out.println output in Web Start Log File

I am new to this but I'm running through the examples in Mauro Marinilli's "Java Deployment with JNLP and WebStart" and the install-win and install-win2 examples are not writing properly to a user-specified log file on my desktop (chosen location). I have several versions of j2re/jre installed on my client computer and have started several of the javaws.exe files on my computer to specify that I wish to Show Java Console and Log Output but
1) no Java console pops up when I subsequently run the JNLP from my web server
AND
2) no log file is written
I do see the batch file left in place for install-win2 so I believe that the application is being run (such as it is... lol)...
Any ideas what the problem might be? All reasonable suggestions (i.e. not PEBKAC) welcomed...
Regards

How about in Solaris?
May I use the similar method to redirect the stdout to a specific file? What is the syntax for this?
Or, I can only start server with interactive mode (without watchdog) and use ">" to redirect the logs?
Thx a lot.

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Need to hide System.out.println output in console

class Hide{
public void test(){
System.out.println("hai");
public static void main(String[] args){
Hide obj=new Hide();
obj.test();
Output is : hai
But I don't want to display hai. How i can hide this
kindly help me on this........

class Hide {
     public void test() {
          System.out.println("hai");
     public static void main(String[] args) {
          System.out.println("before");
          java.io.PrintStream old_out = System.out;
          try {
               java.io.PrintStream pw = new java.io.PrintStream("test.txt");
               System.setOut(pw);
          } catch (java.io.IOException e) {
               e.printStackTrace();
          Hide obj=new Hide();
          obj.test();
          System.setOut(old_out);
          System.out.println("after");
}

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 not showing up in the console

Hi,
I've some System.out.println statements in a static block in a Stateless
Session Bean. I could not see these outputs in the Weblogic console. I'm
using Weblogic 5.1 Any one faced this problem before? any help is
appreciated.
Thanks & Regards,
Nithi.

Take a look in the weblogic log files they might be redirecting std out.
"Ryan LeCompte" <[email protected]> wrote:
>
Hello Nithi,
I'm all out of ideas, unfortunately! However, check out the following
links for
some possible insight into the problem:
http://groups.google.com/groups?q=System.out.println+5.1+WebLogic&start=60&hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=3d3df18e%40newsgroups.bea.com&rnum=69
http://groups.google.com/groups?q=System.out.println+5.1+WebLogic&start=70&hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=3977417b%40newsgroups.bea.com&rnum=71
http://groups.google.com/groups?q=System.out.println+5.1+WebLogic&start=200&hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=3bc20346%241%40newsgroups.bea.com&rnum=209
Best regards,
Ryan LeCompte
[email protected]
http://www.louisiana.edu/~rml7669
"Nithi Rajan" <[email protected]> wrote:
Hi Ryan,
Thanks for your reply and sorry for the long silence. I was on vocation.
Thre problem still remains.I'm very sure that the EJB
is deployed by WebLogic as I'm able to call some methods.
and I'm also calling EJB methods from Servlet. But my
System.out.println statments work fine in the Servlet and
not inside EJB (or anyother classes used by EJB).
Any one has faced similar problems? BTW am using WebLogic 5.1
Thanks in advance,
Regards,
Nithi.
"Ryan LeCompte" <[email protected]> wrote in message
news:[email protected]...
Hello Nithi,
I find it strange that your System.out.println statements are beingexecuted from
within your servlets, but not in your stateless session bean. Are
you
positive
that your EJB is being located and deployed by WebLogic? The statementsin
your
static { } block should be executed as soon as the WebLogic class
loader
finds
the class and loads it into the JVM. I would suggest examining theconsole
and
try to determine if your EJB is in fact being deployed. Are you invokingmethods
on the EJB inside of your servlets? Are you using any logging frameworkfrom within
the EJBs which would redirect output to a file?
Best regards,
Ryan LeCompte
[email protected]
http://www.louisiana.edu/~rml7669
"Nithi Rajan" <[email protected]> wrote:
Hi Ryan,
Thanks for your reply. The setting in the weblogic.properties is
as
follows.
weblogic.system.enableConsole=true
So, that tells me that I should see all the System.out.printlns right?
(Pleasecorrect me if I'm wrong). I can see all the System.out.println
from
my
servletand not from the Session Bean (even if the System.out.println
is
outside
static block).
Please let me know your thoughts.
Thanks & Regards,
Nithi.
"Ryan LeCompte" <[email protected]> wrote in message
news:[email protected]...
Hello Nithi,
Are you sure that you don't have WebLogic configured to redirect
all
messages
to a file instead of the console? Are you able to see yourSystem.out.println
statements when placed within other methods of your stateless sessionbean? Please
be a bit more specific.
Thank you,
Ryan LeCompte
[email protected]
http://www.louisiana.edu/~rml7669
"Nithi Rajan" <[email protected]> wrote:
Hi,
I've some System.out.println statements in a static block in a
Stateless
Session Bean. I could not see these outputs in the Weblogic console.
I'm
using Weblogic 5.1 Any one faced this problem before? any helpis
appreciated.
Thanks & Regards,
Nithi.

Lost System.out.println statements.

Hi
I have few system.out.println in my jsp which i am using in my JSP provider channel. but when I look at the portal server's /var/opt/SUNWam/debug/desktop.debug file, none are there.. I looked at the web server's access and error logs too, but it is not there also.. can somebody tell me how do it get those ?? do we have any other mechanism to put debug logs ?

By default the binary which web server runs is uxwdog which eats up System.out.println output. If you want to see the System.out.println then you need to change the product binary from the start script of the portal server instance.
- Go to <portal-install-dir>/SUNWam/servers/https-<instance-name> and open the start script
- Change the PRODUCT_BIN=uxwdog to PRODUCT_BIN=ns-httpd , save the file
- Run the script ./start to start the portal server
Note : with ns-httpd ON the server will not leave that shell, and in the same window/shell you will be able to see all your System.out.println statements. To close the server you have to kill the server process with "kill -9 pids" command
Alternate way is to use api inside your application or jsp:
<%@page import="com.sun.portal.providers.jsp.JSPProvider, com.sun.portal.providers.*, com.sun.portal.providers.containers.*, com.sun.portal.providers.context.*" %>
<% JSPProvider p=(JSPProvider)pageContext.getAttribute("JSPProvider");
ProviderContext pc = p.getProviderContext(); %>
<%-- after that you can use these lines any where in your jsp --%>
<%
pc.debugError("your error msg");
pc.debugMessage("your msg");
pc.debugWarning("your warning msg");
%>
The perticular mgs will be shwon in /var/opt/SUNWam/debug/desktop.debug file as per your "debugLevel" parameter setting in /etc/opt/SUNWps/desktop/desktopconfig.properties file. By default the debugLevel is set to error so only pc.debugError("error msg") will be shown.
Sanjeev

System.out.println - Hello World Example

Hi All
I am using Apache Tomcat and trying t produce a simple output to the browser. Cannot get System.out.println to work. See code and out below:
begin code
<HTML>
<HEAD><TITLE>hello jsp</TITLE></HEAD>
<BODY>
<%@ page language='java' contentType='text/html' %>
<%
String message = "Hello World";
message = message + "\nAFTER";
System.out.println("BEFORE");
%>
<%= (message) %>
</BODY>
</HTML>
END code
--begin browser output
Hello World AFTER
end browser ouput
Would be grateful if someone could explain why the System.out.print statement cannot be seen in the browser output.
many thanks
Naresh

System.out prints to System.out. What that is depends:
In applets, (which the OP was not talking about) it is the Java Console.
In JSP, it's the same as any application by default.
You can change in Java what System.out prints to, but you don't often do this. But in JSP it doesn't print to the browser. JSP is not CGI, which does you the standard out as the destination for written data.

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.

How to :Logging or System.out.println????

Hi,
Iam not able to see any System.out.println output in SAP? where exactly can i see it? any configuration required to enable logging? if so how?? please help

Hi Sujesh,
see https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/events/webinars/using logging and tracing on the sap web as java.pdf pages 12-17 and pages 22-24.
Also see http://help.sap.com/saphelp_nw04/helpdata/en/e2/75a74046033913e10000000a155106/frameset.htm for portal specific logging issues.
Hope it helps
Detlev

Where does System.out.println go?

Hi Everyone: I know I've seen this topic before, but I'm still having some trouble. I would like to debug my EJBs, and so I've added some System.out.println statements to them. Where does that go? I've looked at the defaultTrace.trc files in the
C:\usr\sap\P48\JC00\j2ee\cluster\server0\log
folder, and haven't found any of the text that I think I am writing. I appreciate any guidance! Ian.

Hi lan,
I was facing the same question earlier, and now I think I have figured out one possible answer. Actually, where the System.out.println goes is up to the Server Admin to config. There is a default SYSTEM.OUT log controller ( under location controller side) pre-defined to cater for all System.out.println(). All the System.out.println() output is considered as INFO type log message. However, this default SYSTEM.OUT controller is not assigned with any real log destination, thus, we cannot find the output anywhere.
If you goes to the log configurator (using Visual Admin), you can locate this SYSTEM.OUT controller , and add in a default (Anonymous) destionation for it . (you need to toggle on the advance edit mode from the top menu , then you can add modify the destination settings of a Controller).
For Anonymous destionation, the println() output will sure go to the defaultTrace.trc (better view it using Log Viewer, instead of viewing it from the log file ).
Or , you can define a separate file (e.g. c:\temp\myStd.log ) as the log destination ..
Last but not the least, you need to set the ForceSingleTraceFile setting from 'YES' to 'NO' , then you can see your "myStd.log".
To change the ForceSingleTraceFile , go to Visual Admin, J2EE server --> Kernel --> LogManager.
Hope you find the above useful.

Difference between System.out.println() and out.println()

Hi,
In JSP we want to write the JNLP file contents to a ouput stream using "out.printl()".
The content of the JNLP file i am having in a String.
The "System.out.println()" is printing the correct JNLP file contents but "out.println()" writing wrong contents which are taken from Server JNLP file.
How to solve this problem?
Please guide me in this.
Thanks and Regards:
Dheeraj

Where is the "System.out.println()" running from? I don't think your problem has anything to do with the difference between System.out.println and out.println. Both methods print what is passed to them. It sounds like you are printing two different files because you are running in two different environments.
JSPs run on a server and only have access to files on the server or on a network the server is on. If you are trying to print a file on a user's system, JSP can't do it.

Need help getting information out of array and into text/object files

Im having alot of trouble with this i have the classes for the array, text reader and writer, and object reader and writer mostly done. I originally had a getInfo method in my object and text classes to input the data needed, but that wasnt how the instructor wanted. So my question is how do i take the infomation in the array in class studentarray and send that information to the text and object classes? I have looked online for an example and cant seem to find one that looks like it would work. I am pretty sure what i need will be put in the class StudentArray
here is requirements i havent figured out how to implement
- read student records from a �text� file
- write student records into a �text� file (new data after sorting)
- read student records from an �object� file
- write student records into an �object� file (new data after sorting)
I have sorting methods below in StudentArray just didnt post them
public class StudentArray {
private static Scanner input = new Scanner(System.in);
private static student sArray[] = new student[5];
public static void insert() throws NegativeIDException
for(int i = 0; i < 5; i++)
System.out.println("Please enter firstname:");
String Fname = input.next();
System.out.println("Please enter lastname:");
String Lname = input.next();
System.out.println("Please enter id:");
int Id = 0;
try
Id = input.nextInt();
NegativeIDException nide = new NegativeIDException("No negative number for id.");
if(Id < 0)
throw nide;
scanner.nextLine();
System.out.println("you must enter a positive number try again");
catch(InputMismatchException ime)
System.err.printf("\nException: %s\n", ime);
scanner.nextLine();
System.out.println("you must enter an integer try again");
System.out.println("Please enter year admitted:");
int Admitted = 0;
try
Admitted = input.nextInt();
NegativeIDException nide = new NegativeIDException("No negative number for id.");
if(Admitted < 0)
throw nide;
scanner.nextLine();
System.out.println("you must enter an integer try again");
catch(InputMismatchException ime)
System.err.printf("\nException: %s\n", ime);
scanner.nextLine();
System.out.println("you must enter an integer try again");
System.out.println("Please enter Gpa:");
double Gpa = input.nextDouble();
int t = 0;
          int q = 0;
          System.out.println("Please select your track");
               System.out.println("1 for doctoral student");
               System.out.println("2 for graduate student");
               System.out.println("3 for major student");
               System.out.println("4 for minor student");
               t = input.nextInt();
               if (t == 1)
                         System.out.println( "Please select your doctoral topic");
                         System.out.println("1 for Video Games");
                         System.out.println("2 for CPU History");
                         System.out.println("3 for Other");
                         int c = input.nextInt();
                         String diss = "";
                         if (c == 1)
                              diss = "Video Games";
                         else if (c == 2)
                              diss = "CPU History";
                         else if (c == 3)
                              diss = "Other";
                         sArray[i] = new CSDoctStudent(Fname, Lname, Id, Admitted, Gpa, diss);
                         q++;
                    else if (t == 2)
                    System.out.println( "Please enter the number for your graduate course");
                    System.out.println("1 for Software Engineering");
                    System.out.println("2 for Theory");
                    System.out.println("3 for Other");
                    int b = input.nextInt();
                    String Theory = "";
                    if (b == 1)
                         Theory = "Software Engineering";
                    else if (b == 2)
                         Theory = "Theory";
                    else if (b == 3)
                         Theory = "Other";
                    sArray[i] = new CsGradStudent(Fname, Lname, Id, Admitted, Gpa, Theory);
               q++;
                    else if (t == 3)
                         System.out.println( "Please enter the number for your major course");
                         System.out.println("1 for Hardware");
                         System.out.println("2 for IS");
                         System.out.println("3 for Theory");
                         int m = input.nextInt();
                         String track = "";
                         if (m == 1)
                         track = "Hardware";
                    else if (m == 2)
                         track = "IS";
                    else if (m == 3)
                         track = "Theory";
                         sArray[i] = new CSMajorStudent(Fname, Lname, Id, Admitted, Gpa, track);
                         q++;
               else if ( t == 4)
                         System.out.println( "Please enter the number for your minor course");
                         System.out.println("1 for Computer Application");
                         System.out.println("2 for Multimedia");
                         System.out.println("3 for Web Technology");
                         int d = input.nextInt();
                         String Hardware = "";
                         if (d == 1)
                              Hardware = "Computer Application";
                         else if (d == 2)
                              Hardware = "Multimedia";
                         else if (d == 3)
                              Hardware = "Web Technology";
                         sArray[i] = new CSMinorStudent(Fname, Lname, Id, Admitted, Gpa, Hardware);
                         q++;
               else;
sArray= new student(Fname,Lname,Id,Admitted, Gpa);
//trying to write it to a text file with this
import java.io.PrintWriter;
import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
public class TStream {
private Scanner input = null;
private PrintWriter output = null;
private student [] sArray = new student[5];
public TStream()
public void write()
try
output = new PrintWriter("tdatabase.txt");
for(int i = 0; i < 5; i++)
output.print(sArray[i].getFname() + "\t");
output.print(sArray[i].getLname() + "\t");
output.print(sArray[i].getId() + "\t");
output.print(sArray[i].getAdmitted() + "\t");
output.print(sArray[i].getGpa() + "\t");
output.println();
output.close();
catch(FileNotFoundException fnfe)
System.err.printf("\nException: %s\n", fnfe);
System.out.println("Can not open this file.\n");
public void read()
try
input = new Scanner(new File("tdatabase.txt"));
for(int i = 0; i < 5; i++)
String Fname = input.next();
String Lname = input.next();
int Id = input.nextInt();
int Admitted = input.nextInt();
double Gpa = input.nextDouble();
sArray[i] = new student(Fname,Lname,Id,Admitted,Gpa);
input.close();
catch(FileNotFoundException fnfe)
System.err.printf("\nException: %s\n", fnfe);
System.out.println("Can not open this file.\n");

Use the [url http://forum.java.sun.com/help.jspa?sec=formatting]Code Formatting Tags so the code retains its original formatting.

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 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

System.out.println not working in Tomcat-4.1.x

System.out.println not working in Tomcat-4.1.24. Any settings has to be enabled??? I am using tomcat for Solaris

I think u can use ServletContext.log() to output info instased.

Is it possible not to use System.out.println?

Hi guyz,
Can anyone tell me if there is a way not to use System.out.println but produce the output on the command prompt? I need to add two numbers which are accepted through the args(command prompt). I have to add them and show them on command prompt without using System.out.println. Can ANYONE HELP?

Hi guyz,
Can anyone tell me if there is a way not
s a way not to use System.out.println but produce the
output on the command prompt? I need to add two
numbers which are accepted through the args(command
prompt). I have to add them and show them on command
prompt without using System.out.println. Can ANYONE
HELP?Why can't you use System.out.println? What's the reason?
Kaj

Not getting System.out.println output in Web Start Log File

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