Adding linebreak in xml file before root node

Question

I am trying to add line break after my comments above the root node in XML document.

I need something like this:

Answer 1

There is a JDK bug concerning this. It was not fixed (as you would expect) because that would likely cause many problems to users' existing applications.

Adding the following output property fixes this:

transformer.setOutputProperty("http://www.oracle.com/xml/is-standalone", "yes");