title: How do I configure log4j logging for a jar?
body: <p>I have a project A with log4j.jar on its build path. I have a number of classes that have logging statements in the form of:</p>
  
  <pre><code>Logger _log = Logger.getLogger(A.&lt;&gt;.class);
  ...
  _log.info("...");
  </code></pre>
  
  <p>I am exporting the project as a jar into another project B. Project B already has its own log4j jar and it's own .xml configuration file. I want to configure particular classes from A to log to Console Apender at varying "levels". How do I do this, please?</p>