title: How do I convert only the special characters of a String to unicode?
body: <p>It's simple, I would like to convert the string characters into Unicode.</p>
  
  <p>E.G:</p>
  
  <pre><code>String txt = "fiancé bla";
  System.out.println("Converted: " +  someMethod(txt) );
  </code></pre>
  
  <p>The output I'm looking for is: <code>Converted: fianc\u00e9 bla</code>. How can I do that?</p>
  
  <p>Thanks in advance.</p>