Logger + FileHandler problems

[JonJacobs]

I tried to create a logger that logs to a file. I expected simple text, but it came out xml.


logger = Logger.getLogger("MyConnect");
fh = new FileHandler(fn);
logger.addHandler(fh);
logger.setLevel(Level.ALL);

All my entries to the log were at the info level.

Strangely, I did get simple text like I wanted, but in the command window instead of in the file. I didn't expect that.

What am I doing wrong? (probably a lot).

Thanks,

[Eranga]

How about the configurations of the logger?

[JonJacobs]

I don't know about that. How do I examine or set that? On a freshly created logger and file handler, the configurations have to be whatever the defaults are.

Thanks,

[JosAH]

I don't know about that. How do I examine or set that? On a freshly created logger and file handler, the configurations have to be whatever the defaults are.

Thanks,

Maybe there's a default configuration file in your jre directory, named logging.properties. It configures the Handlers for the Logger(s); check if it has a line as:

handlers= java.util.logging.ConsoleHandler

If so, a ConsolerHandler is configured, hence the stderr output. Read all about it in the API for the Logger framework.

kind regards,

Jos

[JonJacobs]

Okay, that would explain why I also get console output as well as file output. I'm okay with that; I just thought it strange. My main concern is that I added a FileHandler, not an XML handler, so why is my file output in xml format?

Thanks,

[JosAH]

Okay, that would explain why I also get console output as well as file output. I'm okay with that; I just thought it strange. My main concern is that I added a FileHandler, not an XML handler, so why is my file output in xml format?

Thanks,

I bet you didn't read the API documentation for the FileHandler class because it reads:

•java.util.logging.FileHandler.formatter specifies the name of a Formatter class to use (defaults to java.util.logging.XMLFormatter)

kind regards,

Jos

[JonJacobs]

Actually I was reading documentation for the Logger class, which is what I thought you were sending me to. Formatter class. That's what I needed, I'm sure.

Thank you,

[JonJacobs]

I searched the Web for info on the Formatter class and accidentally found the API documentation you were talking about. I see now. I found the SimpleFormatter class and used that, and got exactly what I wanted.

Thanks for your help,

[JosAH]

I searched the Web for info on the Formatter class and accidentally found the API documentation you were talking about. I see now. I found the SimpleFormatter class and used that, and got exactly what I wanted.

Thanks for your help,

You should never attempt to program any Java code without having the complete API documentation available. Here it is. Bookmark it or download the entire thing.

kind regards,

Jos

[Eranga]

You should never attempt to program any Java code without having the complete API documentation available. Here it is. Bookmark it or download the entire thing.

kind regards,

Jos

I've miss lots of discussion over here, but I wants add something on this.

I agreed with Jos, and I've seen that Jos and most of the other members are mentioned highlighting about this. My suggestion is better to keep an offline of the doc in the PC, and it's possible to attach with most of the IDEs available nowadays.

[JonJacobs]

>having the complete API documentation available

>better to keep an offline of the doc

Done.

Thanks,

[Eranga]

That's great. And also if you've solve the problem, please mark the thread solved. :)