title: check whether a library has already been loaded with System.load(...)
body: <p>In my java program, I loaded a library built from native code by:</p>
  
  <pre><code>System.load(PATH_TO_LIB_FILE);
  </code></pre>
  
  <p>I am wondering in Java, how could I check whether this specific library has been loaded already before I execute the above code? </p>