title: default locale and numberformat
body: <p>Hi I am struggling to format numbers like the documentation for NumberFormat.getInstance() says. 
  (Windows 7, NetBeans, Java 7)</p>
  
  <p>I have first gone into regional settings and removed us english, us english keyboards and everything. I set it all to French and France. I even rebooted my pc. My code is:</p>
  
  <pre><code>System.setProperty("user.language", "fr");
  System.setProperty("user.country", "FR");
  System.setProperty("user.language.display", "fr");
  System.setProperty("user.country.display", "FR");
  System.setProperty("user.language.format", "fr");
  System.setProperty("user.country.format", "FR");
  Locale locale = new Locale("French", "France");
  Locale.setDefault(locale);
  Locale.setDefault(Locale.Category.DISPLAY, locale);
  Locale.setDefault(Locale.Category.FORMAT, locale);
  java.text.NumberFormat nf = java.text.NumberFormat.getInstance();
  System.out.println(nf.format(4.5));
  </code></pre>
  
  <p>Despite all of this, the program prints "4.5". I don't understand, for French France this should be "4,5". What more do I need to do?</p>