title: Regex doesn't work in String.matches()
body: <p>I have this small piece of code</p>
  
  <pre><code>String[] words = {"{apf","hum_","dkoe","12f"};
  for(String s:words)
  {
      if(s.matches("[a-z]"))
      {
          System.out.println(s);
      }
  }
  </code></pre>
  
  <p>Supposed to print </p>
  
  <pre><code>dkoe
  </code></pre>
  
  <p>but it prints nothing!!</p>