I'm looking for Java program code that accurately computes the
Flesch-Kincaid, Dale-Challe, or Spache readability of a text passage.

There are several web sites where you can paste a text passage into
the web browser and it will compute the readability for you. These do
not fit my needs, I need actual program code that does the
calculations.

You can find code for numerous readability measures, including
Flesck-Kincaid readability scores, at this site:


http://www.rfp-templates.com/What-are-Readability-Statistics.html
What readability statistics exactly are?


Use the code in the blue box about 2/3 of the way down the page.  

Let me know if there's anything more you need on this.


David