title: Unable to get String.split() to work as expected on android
body: <p>I want to split an email string in java (android) but it not work correctly. </p>
  
  <pre><code>Input: "ihnel48@gmail.com"
  String[] pattens = email.split("@.");
  Expected: "ihnel48", "gmail", "com"
  Output: "ihnel48" "mail.com"
  </code></pre>