title: Parse multiple doubles from a String
body: <p>I would like to know how to parse several double numbers from a string, but string can be mixed, for instance: <code>String s = "text 3.454 sometext5.567568more_text"</code>.</p>
  
  <p>The standard method (<code>Double.parseDouble</code>) is unsuitable.  I've tried to parse it using the <code>isDigit</code> method, but how to parse other characters and <code>.</code>?</p>
  
  <p>thanks.</p>