title: Adding log4j to build.gradle
body: <p>Trying to create simple Gradle Java project in my Eclipse. I'm using LOG4J library, so my build.gradle looks:</p>
  <pre><code>plugins {
      // Apply the java-library plugin to add support for Java Library
      id 'java-library'
  }
  
  repositories {
      // Use jcenter for resolving dependencies.
      // You can declare any Maven/Ivy/file repository here.
      jcenter()
  }
  
  dependencies {
      compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.13.3'
      compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.13.3'
      
      // This dependency is exported to consumers, that is to say found on their compile classpath.
      api 'org.apache.commons:commons-math3:3.6.1'
  
      // This dependency is used internally, and not exposed to consumers on their own compile classpath.
      implementation 'com.google.guava:guava:28.2-jre'
  
      // Use JUnit test framework
      testImplementation 'junit:junit:4.12'
  }
  </code></pre>
  <p><br />
  I added two lines in this file that I expect will allow to download log4j library:</p>
  <pre><code>compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.13.3'
  compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.13.3'
  </code></pre>
  <p>But looks this not help, because in case I build project with gradle I have compile errors.</p>
  <pre><code>The compile configuration has been deprecated for dependency declaration. This will fail with an error in Gradle 7.0. Please use the implementation or api configuration instead. Consult the upgrading guide for further information: https://docs.gradle.org/6.3/userguide/upgrading_version_5.html#dependencies_should_no_longer_be_declared_using_the_compile_and_runtime_configurations
          at build_d9ael385qeshfiepcaw3797hi$_run_closure2.doCall(/home/a/Documents/workspace-sts/l4j/build.gradle:21)
          (Run with --stacktrace to get the full stack trace of this deprecation warning.)
  
  &gt; Task :compileJava FAILED
  </code></pre>
  <p>I suppose I declared log4j in deprecated way (I took these lines from log4j manual). But how to declare <code>log4j</code> in <code>build.gradle</code> in order to use them in my project?</p>
  <p>Build command:</p>
  <pre><code>./gradlew build --refresh-dependencies --warning-mode all
  </code></pre>
  <p>And my main class:</p>
  <pre><code>package l4j;
  import org.apache.log4j.Logger;
  import org.apache.log4j.PropertyConfigurator;
  
  public class aa {
  
      static Logger logger = Logger.getLogger(Log4jPropertiesConfigurationExample.class);
      public static void main(String[] args)
      {
          //PropertiesConfigurator is used to configure logger from properties file
          PropertyConfigurator.configure(&quot;log4j.properties&quot;);
   
          //Log in console in and log file
          logger.debug(&quot;Log4j appender configuration is successful !!&quot;);
      }
  
  }
  </code></pre>