Actually, the following is the cleanest implementation I have seen so far. It uses an annotation to convert a comment into a string variable...
/**
<html>
<head/>
<body>
<p>
Hello<br/>
Multiline<br/>
World<br/>
</p>
</body>
</html>
*/
@Multiline
private static String html;
So, the end result is that the variable html contains the multiline string. No quotes, no pluses, no commas, just pure string.
This solution is available at the following URL... http://www.adrianwalker.org/2011/12/java-multiline-string.html
Hope that helps!