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! > > > > > > -- > > Please test what you build. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > -- Please test what you build.
