debug variables in play framework

Question

How can I debug or inspect variables and classes in Play framework or simple Java?

In specific:

Which ways are better in application?
eg. in Ruby on Rails I would do one of the following:

raise myvar.to_yaml        # halts everything for inspect
Rails.logger.debug myvar   # log
puts myvar                 # log

And which one would be better in groovy templates?
eg. in Ruby on Rails:

<%= debug myvar %>
<%= myvar.inspect %>

Please note I'm new to Play framework and Java develoment.

Answer 1

In eclipse, you have an option "Connect JDPA [applicationname].lanuch" to debug. Right click and enable debug.

you can refer the below document for other IDE. It has detailed explanation for debugging.

http://www.playframework.org/documentation/1.0.1/ide