Function handle invoking Java reports syntax error?

1 view (last 30 days)
Ahmed Fasih
Ahmed Fasih on 6 Mar 2012
Why does
d='.'; mylength = length(java.io.File(d).listFiles(org.apache.commons.io.filefilter.WildcardFileFilter('*.dat')))
work, but a function handle for input "d" fail with a syntax error?
length_func = @(d) length(java.io.File(d).listFiles(org.apache.commons.io.filefilter.WildcardFileFilter('*.dat')))
??? Error: Expression or statement is incorrect--possibly unbalanced (, {, or [.
  1 Comment
Ahmed Fasih
Ahmed Fasih on 7 Mar 2012
This following does work:
helper=@(f) f.listFiles(org.apache.commons.io.filefilter.WildcardFileFilter('*.dat'))
length_func = @(d) length(helper(java.io.File(d)))

Sign in to comment.

Sign in to answer this question.

Answers (1)

Laurens Bakker
Laurens Bakker on 7 Mar 2012
Hi Ahmed,
anonymous functions are not allowed to store any data, and accessing a field of java.io.File(d) probably implicitly does this.
Cheers,
Laurens

Categories

Find more on Call Java from MATLAB in Help Center and File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!