Well, I don't know if it's possible... It's from memories about C/C++.

Is it possible to define global variable, like DEBUG, DISPLAY, which could tune displayed information... Typically, while debugging, I want to see every thing but later on, no time for that.

I don't know how to do that, except of course, by adding an extra variable to all my methods but it would be neither tractable nor handy.

Thanks. Cheers,
Pierre-Yves

As far as I know, java does not work with Global Variables. You could defined a static variable at your highest class and all other class would inheritance that variable, but that is it

Thanks Megaman... My programs won't have the possibility to change their log level...

Cool, my pleasure. I could be wrong though That has been a long since I last touched Java. I might start at it again, it was so cool

I always trust someone who says 'There's no point to try, get some rest'... ;-)

Java still has no concept of true global variables, but as far as I'm concerned it shouldn't anyway cuz it's pure OO by design (as a rule), and thus every variable should have a scope. You might serve better to do something like setting what System.out is with System.setOut(java.io.PrintWriter) at convenient times... like:

if(System.getProperty("debug") == null) {
System.setOut(new NullPrintWriter());
}

...

class NullPrintWriter extends PrintWriter {
(some code to do nothing when you write to it)
}

This is all from memory but I'm sure it's not that far off... it might be an outputstream instead of a printwriter.

HTH

B.

One way you can achieve is that, create a new class and define a static variables inside.
For example,

public class LogLevel {
public static final int DISPLAY = 0;
public static final int DEBUG = 1;
public static final int RELEASE = 2;
}

and you can refer to these variables from anywhere in your program like,

LogLevel.DEBUG
LogLevel.RELEASE

so it's the same as the global variables in C++ except that you need to add the class name in front.


But the more efficient way is that, you can use the logging facilities. Jdk1.4 and onwards have the build-in logging features with different levels.
And there is more powerful, and feature-rich 3rd party tool available for logging from http://www.apache.org , which is called log4j under the jakarta project which is very popular and a lot of ppl using it.

Thanks very much... I'll have a look... ;-)