Whoops, I neglected one thing...
java -cp .;log4j-1.2-17.jar Hello
Notice I added the current directory to the classpath. Change the classpath
separator character to a colon if needed.
Jake
On Tue, 14 May 2013 09:00:57 -0700
Mary Laude <[email protected]> wrote:
Here is what I just did. Note I am actually inside a Win VM, at a cygwin
prompt.
Mary@WinServ2008-Enterprise /home/Mary/apache-log4j-1.2.17
$ ls
build.properties.sample INSTALL log4j-1.2.17.jar site
build.xml JarDir.class NOTICE src
contribs JarDir.java NTEventLogAppender.amd64.dll tests
examples KEYS NTEventLogAppender.dll
Hello.java LICENSE pom.xml
Mary@WinServ2008-Enterprise /home/Mary/apache-log4j-1.2.17
$ echo $CLASSPATH
/home/Mary/apache-log4j-1.2.17/
Mary@WinServ2008-Enterprise /home/Mary/apache-log4j-1.2.17
$ javac -cp ./log4j-1.2.17.jar Hello.java
Mary@WinServ2008-Enterprise /home/Mary/apache-log4j-1.2.17
$ java -cp ./log4j-1.2.17.jar Hello
Error: Could not find or load main class Hello
Mary@WinServ2008-Enterprise /home/Mary/apache-log4j-1.2.17
$ ls
build.properties.sample Hello.java LICENSE pom.xml
build.xml INSTALL log4j-1.2.17.jar site
contribs JarDir.class NOTICE src
examples JarDir.java NTEventLogAppender.amd64.dll tests
Hello.class KEYS NTEventLogAppender.dll
Any ideas?
Thx.
Mary
On Tue, May 14, 2013 at 8:36 AM, Jacob Kjome <[email protected]> wrote:
No, Mary is just running an example from the install documentation. And
since the code is calling BasicConfigurator.configure(), there is no need
for a config file in the classpath (though it is generally recommended to
use a config file rather than configure via code).
Mary, please provide an example of your java command line when you run
this. It should look something like...
java -cp log4j-1.2-17.jar Hello
Jake
On Tue, 14 May 2013 10:41:18 +0900
Remko Popma <[email protected]> wrote:
Mary,
Gary was referring to log4j-2.0. While generally more awesome (ahem), it
does need those 2 jars to run.
You seem to be using log4j-1.2. Then you should only need the one jar.
You also need a log4j.properties or log4j.xml file in a directory that is
in the classpath. The site should have some sample config files.
In your code, I don't think you need to call
BasicConfigurator.configure();
I think you can safely remove that line; log4j will pick up your config
file from the classpath.
Sent from my iPhone
On 2013/05/14, at 10:30, Mary Laude <[email protected]> wrote:
Hey - thanks for the quick reply! Ya know, I read that bit
but the jar file I have is named log4j-1.2-17.jar, and I thought
it comprised everything. When I downloaded the code, that's
the only jar file there was. Clearly, I was delusional! I'll go
look for the corresponding API and core jar files...
Thanks again!
On Mon, May 13, 2013 at 6:00 PM, Gary Gregory <[email protected]
>wrote:
You need the API and core jar files on your classpath for compilation
and runtime.
Gary
On May 13, 2013, at 20:46, Mary Laude <[email protected]> wrote:
Hello -
I can write, compile, and successfully run a Java program
to look at a .jar file and list the classes defined therein, but
I can't for the life of me get your "Using log4j" java code shown
in 1-2.17's INSTALL doc to work.
Perhaps there's some other magic that needs to happen to get
this code snippet you wrote to yield output?
------------------------------**------------------------------**
----------------------------
You can now test your installation by first compiling the following
simple program.
import org.apache.log4j.Logger;
import org.apache.log4j.**BasicConfigurator;
public class Hello {
private static final Logger logger =
Logger.getLogger(Hello.class);
public
static
void main(String argv[]) {
BasicConfigurator.configure();
logger.debug("Hello world.");
logger.info("What a beatiful day.");
}
}
------------------------------**------------------------------**
-----------------------------
I understand how CLASSPATH works, etc. I can get it to compile but
even if I again (with option -cp) specify exactly where the .class file
is
that it just created from the compile, it still can't find what it
needs.
Depending on where I've put things and what I tell it, I get one of
these
failing results when I try to run the executable:
(1)
java.lang.**NoClassDefFoundError: org/apache/log4j/Logger
at Hello.<clinit>(Hello.java:6)
Caused by: java.lang.**ClassNotFoundException: org.apache.log4j.Logger
at java.net.URLClassLoader$1.run(**URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(**URLClassLoader.java:355)
at java.security.**AccessController.doPrivileged(**Native
Method)
at java.net.URLClassLoader.**findClass(URLClassLoader.java:**
354)
at java.lang.ClassLoader.**loadClass(ClassLoader.java:**423)
at sun.misc.Launcher$**AppClassLoader.loadClass(**
Launcher.java:308)
at java.lang.ClassLoader.**loadClass(ClassLoader.java:**356)
... 1 more
Exception in thread "main"
or (2)
Error: Could not find or load main class Hello
Please, I am an old UNIX geek but this is really really frustrating me.
I have looked literally EVERYWHERE to find out what the problem is
but of course I am apparently the first and only person to ever have
this
problem. Ha!
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