title: Javac compilation error
body: <p>I am trying to compile a Java class but I get this error:</p>
  
  <pre><code> TestRunner.java
  TestRunner.java:3: error: package org.junit.runner does not exist
  import org.junit.runner.JUnitCore;
                         ^
  TestRunner.java:4: error: package org.junit.runner does not exist
  import org.junit.runner.Result;
                         ^
  TestRunner.java:5: error: package org.junit.runner.notification does not exist
  import org.junit.runner.notification.Failure;
                                      ^
  TestRunner.java:9: error: cannot find symbol
                  Result result = JUnitCore.runClasses(ApplicationIT.class);
                  ^
    symbol:   class Result
    location: class TestRunner
  TestRunner.java:9: error: cannot find symbol
                  Result result = JUnitCore.runClasses(ApplicationIT.class);
  </code></pre>
  
  <p>It is unable to resolve any of the import packages and classes. </p>
  
  <p>I'm not sure what is wrong? </p>
  
  <p>Thanks</p>