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!

Similar Messages

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.

System.out.println and out.println

Sir,
i wana know the diff between System.out.println() and println plz help in this regard. how they work in jsp .
thanks

Hi
System.out.println is a method of PrintStream in IO which is used to print the output on console in java progs.Here in jsp ,the o/p is printed on server's console window.But out.println is totally different as, out is implicit object derived from JspWriter and is used sly to PrinWriter 's object is used in servlets.It's work is to write upon Browser.
System.out.println() is normally used in jsp for debugging purposes only.
Ashish

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
System.out.println() Sends the output to the 'stdout' stream
and System.err.println() ?sends the output to the 'stderr' stream.
http://en.wikipedia.org/wiki/Standard_input

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 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 and Network Adapter problem

Hello,
I am encountering a 2 strange problems. I have 2 oracle application server instances, one dev and one production.
The first problem is when I type System.out.println in the JSP's i am able to see the output in both \opmn\logs\oc4jinstance. But the System.out.println in the java classes or bean show up only in development logs but not in production box.
Is there a setting I am missing here?
The second problem is on our development machine the application works fine, but as soon as we deploy the application on production I encounter:
could not open new connection: Io exception: The Network Adapter could not establish the connection
I have a class called DBUtils, which uses a 3rd party library to get connections from the connection pool as below. Using JSP I call the getConnection(). On my dev Oracle Application Server Instance it works fine, but on production I get the error. Can it be there is a setting that I am missing on the production box?
When I use a JSP and connect to the database without using the DBUtil class. I can connect to the database fine. Also using the DBUtil class with production oracle IP address on the development machine lets me connect with no problem, but production machine does not let me.
public class DBUtils {
static ConnectionPoolBean pool;
static {
System.out.println("DBUtils() - before connection pool bean");
pool = new ConnectionPoolBean();
pool.setDriverClassName("oracle.jdbc.driver.OracleDriver");
pool.setdbURL("jdbc:oracle:thin:@IPADDRESS:PORT:SID");
pool.setUser("USERNAME");
pool.setPassword("PASSWORD");
pool.setInitialConnections(1);
pool.setIncrement(1);
pool.setSoftMaxConnections(40);
public static Connection getConnection() throws SQLException {
System.out.println("Getting Oracle Connection");
return pool.getConnection();
public static void returnConnection(Connection conn) throws SQLException {
System.out.println("Returning Connection");
pool.returnConnection(conn);
Thanks for your help in advance.

Hi
System.out.println is a method of PrintStream in IO which is used to print the output on console in java progs.Here in jsp ,the o/p is printed on server's console window.But out.println is totally different as, out is implicit object derived from JspWriter and is used sly to PrinWriter 's object is used in servlets.It's work is to write upon Browser.
System.out.println() is normally used in jsp for debugging purposes only.
Ashish

System.out.println and EJBs

Hi,
I'm trying to develop an application that has 2 main components:
1) A stateless session EJB, which is called by the container timer service periodically and makes some DB uptades.
2) A servlet which basically calls the create method in the EJB.
I've implemented a prototype of the app and the servlet code looks like this:
try {
Context context = new InitialContext();
MyClassLocalHome home = (MyClassLocalHome)PortableRemoteObject.narrow(
               context.lookup("java:comp/env/ejb/MyClass"),
          MyClassLocalHome.class);
System.out.println("Narrowed");
MyClassLocal timer;
// create a new instance
timer = home.create();
System.out.println("Created!");
In the ejbCreate() in MyClass callback, all I have is a System.out.println("ejbCreate() called") to show the method was called.
My problem is the even though the servlet code runs without errors and I can see the output in the application server's SystemOut.log, I can't find "ejbCreate() called" message. Am I looking in the wrong place? Am I doing something wrong?
Thanks in advance.
Pedro

Hi Pedro,
You're not necessarily doing something wrong. Where are you actually invoking a business method on the Stateless Session bean? In the Stateless Session Bean lifecycle, the actual bean instance creation is not required to be linked to the Home.create() call. That's because Stateless Session bean instances have no client-specific state. The container can delay the bean instance creation until an actual business method is called. Only then would the bean instance's ejbCreate method be called.
--ken

System.out.println and OAS

Hello All,
I have few System.out.println statements in my J2EE application which is running on OAS. I'm not sure where it is writing. I couldn't find anything in the server.log. Really appreciate any ideas.
Thanks

I know this is a couple of months old but it's a useful tip for anyone else having the same problem.
You can't see the System.out.println statements in any logs through the administration web pages of the OAS. You have to go through the filesystem, which is annoying and in my opinion a massive error by Oracle. But never mind.
The filepath is:
%ORACLE_HOME%/opmn/logs/default_group~***~default_group~1.log
replace *** with the name of your oc4j instance
HTH
Paul

What is the different between System.out.println and out.print

we move a project , jsp form to servlet to mysql db
suddenly we get Chinese input problem
on meantime only Thing I know is
if( chineseName!=null) {
                       chineseName= new String( chineseName.getBytes("ISO-8859-1"),"UTF-8");
                     out.print(chineseName); //display Chinese
                      System.out.println("Hello1"+chineseName ); // display unread symbol
             }I don't know why when we insert the value into db by StudentInsert(university_ID, surName, english_Name, chineseName, Address)
the db get the value from System.out.println
what setting decide my out put through System.out.println

Thank you for the reply!
after two days of search and guess.... I found out
for Web application , which under glassfish , you need to put your jsp page under WEB-INF,
other wise the server jsp turn your Chinese character that come from jsp request form to UTF8 symbol.
not ideal how to change the configuration in glassfish yet!

What is the difference between System.out.println() and System.out.print()?

Hi everyone,
I am only a new comer and know very little about Java. I will appreciate a lot if anyone teaches me what the difference between two method println and print is? Thank you so much.

The PrintStream class defines a number of print() methods that ... print
things. System.out is a commonly used PrintStream.
The difference between the print(...) and println(...) methods is that the
second one prints a new line at the end. What it actually prints varies
from system to system: sometimes it will output a '\n' sometimes not.
There is a system property called line.separator that determines
how a new line is output.

Print System.out.println messages into logs of Weblogic Application Server

Hi,
I use Weblogic Application Server 10.3.6 on Windows 7. The Enterprise Application (J2EE) is deployed into the 'AdminServer' of Weblogic. For debugging purpose, I have added a few System.out.println statements.
I am unable to see the print messages on any of log files available in path 'user_projects > domains > base_domain > servers > AdminServer > logs'. However, I can see them on the 'command' prompt which was used to start the server. How can I get them into one of the log files? What am I missing?
I tried reading other threads on the forum and as per them 'System.out.println' gets logged onto *.out logs which I am unable to find. Only base_domain.log, AdminServer.log, access.log are available in the location.
More Specifics:
Configuration on WLS console 'Home > Servers > AdminServer > Logging'
Log file name: logs/AdminServer.log
Min. Severity to log: Notice (tried with Debug as well)
Advanced Options:
Logging Implementation: JDK
Redirect stdout logging enabled: False (tried both options)
Log file Severity Level: Notice (tried with Debug as well)
Standard Out Severity Level: Notice (tried with Debug as well)
Thanks

Paul,
I just found this on google:
'Generally, developers put a lot of System.out.println statements in their code to perform application debugging. Normally, all standard outputs and error outputs are routed to the console where the OC4J server is started. If you want to capture the standard output and error outputs to files for logging/debugging purposes, then you can use the -out and -err options while starting up the Oc4J server to specify which files to use.'.
http://www.onjava.com/pub/a/onjava/2002/01/16/oracle.html?page=2

Log4j and System.out.println

I have to implement log4j onto a running application, the whole application uses System.out.println for logging.
Can implement log4j without changing the code.
Regards,
Sabari

Create a PrintStream which writes to log4j. Make sure the PrintStream writes to the current System.out if called when it is already being called.
Set this as the default out and err with System.setOut() and setErr().

System.out.println in Servlets/JSPs

Hi,
Which file and directory in JDeveloper 10g (10.1.3.0) on windows does the output of System.out.println get logged to? THanks in advance.
regards,

Goes to standard out, not a file. So if you're running the embedded server you will see it in your Embedded Server Console window. However, you should never be using system.out.println in a servlet/jsp. Instead use commons logging or log4j to get log messages.

System.out.println and log file

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