title: error: exception IOException is never thrown in body of corresponding try statement
body: <p>I receive an error each time. What am I doing wrong? </p>
  
  <p>My Code:</p>
  
  <pre><code> public static void hashMap(String crnString)
  {
      try
      {
          if (mMap.containsKey(crnString))
          {
              int count = mMap.get(crnString);
              count++;
              mMap.put(crnString, count);
          }
          else
          {
              mMap.put(crnString, 1);
          }
      }
      catch (IOException e)
      {
          e.printStackTrace();
      }
      finally
      {
      }
  }
  </code></pre>