title: What does line.split(",")[1] mean [Java]?
body: <p>I came across code where i had encountered with <code>Double.valueOf(line.split(",")[1])</code>
  I am familiar with <code>Double.valueOf()</code> and my problem is to understand what does <code>[1]</code> mean in the sentence. Searched docs didn't find anything.</p>
  
  <pre><code>while ((line = reader.readLine()) != null)
                  double crtValue = Double.valueOf(line.split(",")[1]);
  </code></pre>