title: adding java core libraries from maven central repository
body: <p>I am new to maven.
  I was trying a simple maven project in which i want to include the core java library from maven central repository.
  I found this dependency from search.maven.org</p>
  
  <pre><code>&lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
  &lt;groupId&gt;com.sun&lt;/groupId&gt;
  &lt;artifactId&gt;rt&lt;/artifactId&gt;
  &lt;version&gt;1.5.0_06&lt;/version&gt;
  &lt;name&gt;Sun Java Runtime Environment&lt;/name&gt;
  &lt;description&gt;Java Runtime Environment that can be found in Sun's JRE lib folder&lt;/description&gt;
  </code></pre>
  
  <p>But maven stores rt's pom in local repository, i am not able to access rt jar which has java core libraries.</p>