A Question About java_import

jason_sam · June 8, 2014, 7:54pm

Does anyone know why I sometimes need to use quotations when using
java_import?

For instance, this works fine:

java_import com.badlogic.gdx.Gdx

But if I try and use this,

java_import box2dLight.RayHandler

it tells me it can’t find the library. But it works fine if I add the
quotes:

java_import 'box2dLight.RayHandler'

Is there something missing from the setup of the .jar? It’s not a big
deal, but I have no idea what’s going on.

mcampbell · June 8, 2014, 8:18pm

My guess is this line of code:

github.com

jruby/jruby/blob/master/core/src/main/ruby/jruby/java/core_ext/kernel.rb#L3


      
          # frozen-literal-string: true
          
          
# Convenience methods for top-level packages without the need to prefix e.g. `Java::java.util.ArrayList`.
          # @note These methods are undef-ed within Java package stubs (in case of *com.foo.com*).
          module Kernel
            # Java package short-cut method.
            # @example
            #    java.lang.System
            def java
              JavaUtilities.get_package_module_dot_format('java') # stub
            end
            # Java package short-cut method.
            # @example

So packages that start with java, javax, javafx, com, and org will work
without quotes, but for any other packages you will need to quote.

mcampbell · June 9, 2014, 2:14am

Ahh, thanks. That makes a lot of sense.