Re: One more question about invoking java methods from Clojure
You are likely passing a string to the function, not a java.io.File object. On Thu, Mar 27, 2014 at 1:16 AM, Brandon Barret mrbarret...@gmail.com wrote: I am working on a project that requires me to get the size of a file and access it's last date of modification. It seems like the java methods .length and .lastmodified could be pretty handy in this situation. I am, however, having a bit of trouble wrapping my head around how to access a java method from a clojure project. Some examples I have seen import the java classes directly, as you would in a standard java project, whereas others seem to take a different approach. I decided to import java.io.File and try to get the length of a file: (defn get-length [file] (println (.length file---a rather crude representation of my effort. When I ran this, no exceptions were thrown and it gave me a length, only that length was the number of words in the file name I provided, not the actual size of the file. It seems as though clojure may have a different length function built-in, but I'm not sure. So to get to the overall point: what is the standard way to access java methods from clojure (if there is one)? Do I simply need to import the java class, or is there much more to it that I am not yet understanding? Any tips would be great. I am new and loving the language, but a bit confused. Thanks! -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: One more question about invoking java methods from Clojure
Also, when I run either method, it returns 0. Do I need to set up the function so it can return a long value or date value, respectively? The .getName method seems to work fine. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: One more question about invoking java methods from Clojure
Wow...I am..wow, you are right. Thanks for the quick reply! -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: One more question about invoking java methods from Clojure
On Wednesday, March 26, 2014 8:24:15 PM UTC-4, Brandon Barret wrote: Wow...I am..wow, you are right. Thanks for the quick reply! So I would set up the parameter as a file Object first and then it should work okay? I think I am seeing the error of my ways quite clearly! -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
