How To Create A Error Log File In Java
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and how to write into a log file in java policies of this site About Us Learn more about Stack Overflow the how to write log file in java using log4j company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users
Java Filehandler
Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes
How To Create A Log File In Java Code
a minute: Sign up How to write logs in text file when using java.util.logging.Logger up vote 64 down vote favorite 29 I have a situation in which i want to write all logs created by me to write into a text file. we are using java.util.logging.Logger API for generating the logs. I tried private static Logger logger = Logger.getLogger(className.class.getName()); FileHandler fh; how to create log file in java web application fh = new FileHandler("C:/className.log"); logger.addHandler(fh); But still getting my logs on console only.... Kindly help. Thanks in Advance java logging share|improve this question edited Oct 1 '13 at 7:20 Raedwald 17.6k1265104 asked Apr 2 '13 at 7:41 Pankaj 371259 possible duplicate of java logging API, disable logging to standard output –Raedwald Oct 1 '13 at 7:21 add a comment| 6 Answers 6 active oldest votes up vote 119 down vote accepted Try this sample. It works for me. public static void main(String[] args) { Logger logger = Logger.getLogger("MyLog"); FileHandler fh; try { // This block configure the logger with handler and formatter fh = new FileHandler("C:/temp/test/MyLogFile.log"); logger.addHandler(fh); SimpleFormatter formatter = new SimpleFormatter(); fh.setFormatter(formatter); // the following statement is used to log any messages logger.info("My first log"); } catch (SecurityException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } logger.info("Hi How r u?"); } Produces the output at MyLogFile.log Apr 2, 2013 9:57:08 AM testing.MyLogger main INFO: My first log Apr 2, 2013 9:57:08 AM testing.MyLogger main INFO: Hi How r u? Edit: To remove the console handler, use logge
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or
Java Logging Configuration File
posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss java log file location Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes java simpleformatter a minute: Sign up (Java) writing events to log text file up vote 5 down vote favorite 3 I am trying to write the events in a log file but no file is being created. I am getting no error http://stackoverflow.com/questions/15758685/how-to-write-logs-in-text-file-when-using-java-util-logging-logger at all. Here is the log class: public class Logs { static FileHandler fileTxt; static SimpleFormatter formatterTxt; static public void logging() throws IOException { Logger logger = Logger.getLogger(""); logger.setLevel(Level.INFO);//Loget Info, Warning dhe Severe do ruhen fileTxt = new FileHandler("c:/SimleTaskEvents.txt"); formatterTxt = new SimpleFormatter(); fileTxt.setFormatter(formatterTxt); logger.addHandler(fileTxt); } } java logging text-files share|improve this question edited Dec 20 '12 at 10:59 a_horse_with_no_name 186k24234311 asked Dec 20 '12 at 10:55 Han 152229 1 In the future please post your exact error message –Wojtek http://stackoverflow.com/questions/13970595/java-writing-events-to-log-text-file Dec 20 '12 at 10:58 I am getting no error at all. Only that no file is being created in "c:/" –Han Dec 20 '12 at 11:00 Tested your code and it works fine. The problem is somewhere else. –svz Dec 20 '12 at 11:17 add a comment| 5 Answers 5 active oldest votes up vote 3 down vote accepted fileTxt = new FileHandler("c:/SimleTaskEvents.txt"); This line only creates a handler. It does not create the file. What you need to do is, create the file(SimleTaskEvents.txt) in the directory "C:/". after that when u execute your program, the same program that u have put here, you will see logs being written to it. share|improve this answer edited Oct 5 '13 at 14:52 MichaC 9,04222342 answered Oct 5 '13 at 14:26 manick 513 add a comment| up vote 4 down vote You need to write to the log first logger.info("this is a line of logging"); and maybe check this tutorial share|improve this answer answered Dec 20 '12 at 10:58 emeraldjava 4,6351061113 Yes I am doing that through another class. I declare: –Han Dec 20 '12 at 11:01 private final static Logger lgs = Logger.getLogger(Logs.class.getName()); –Han Dec 20 '12 at 11:02 and I use the lgs object than. The problem is that no file is being created! –Han Dec 20 '12 at 11:02 add a comment| up vote 0 down vote You need to ad
This Site Careers Other all forums Forum: Beginning Java Writing into log file Gopu Akraju Ranch Hand Posts: 242 posted 8 years ago I have finished developing a swing application and I https://coderanch.com/t/410260/java/java/Writing-log-file would like to change all my System.out.println statements into log. I would like to write these lines into a log file for that application. I am planning to concatenate all these strings into one string and finally opening a log file to write everything in one step before the program exit. B'cos I feel it would be cumbersome to open many times to log file write the System.out into log file (With as many as try catch.. as many as System.out statements). Any other nicer way to do this? [ April 28, 2008: Message edited by: Gopu Akraju ] Gopu Akraju Ranch Hand Posts: 242 posted 8 years ago Hi after googling I came to know about the class Logger. I treid a small example from the web log file in as below. import java.io.IOException; import java.util.logging.FileHandler; import java.util.logging.Level; import java.util.logging.Logger; import java.util.logging.SimpleFormatter; public class MyLogger { public static void main(String[] args) { Logger logger = Logger.getLogger("MyLog"); FileHandler fh; try { // This block configure the logger with handler and formatter fh = new FileHandler("C:/temp/test/MyLogFile.log"); logger.addHandler(fh); //logger.setLevel(Level.ALL); SimpleFormatter formatter = new SimpleFormatter(); fh.setFormatter(formatter); // the following statement is used to log any messages logger.info("My first log"); } catch (SecurityException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } logger.info("Hi How r u?"); } } The output looks like below: Apr 29, 2008 9:57:08 AM testing.MyLogger main INFO: My first log Apr 29, 2008 9:57:08 AM testing.MyLogger main INFO: Hi How r u? Is there any better of doing this? Thanks. Gopu Akraju Ranch Hand Posts: 242 posted 8 years ago logger works fine. How do I limit the size of the log file. After the file size has reached by 51MB, I want to flush the contents and starts writing again in the same file. Thanks in advance. Laxman Guru Greenhorn Posts: 17 posted 8 years ago Refer Here Laxman Gopu Akraju Ranch Hand Posts: 242 poste