title: Does UUID.randomUUID() contain any special characters?
body: <p>ok, see</p>
  
  <pre><code>String myUniversalString=String.valueOf(UUID.randomUUID());
  </code></pre>
  
  <p>My question is that </p>
  
  <p>Does <code>myUniversalString</code> contain any special characters such as <code>"#","@","!","~", etc</code>?</p>