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Java

Lukas Baumgartner
Lukas Baumgartner
14,817 Points
Posted by Lukas Baumgartner
Lukas Baumgartner
14,817 Points

Java 8 Streams | Average word count

Hy!

I'm trying to do some exercise on Streams and encountered following problem:

I have a textfile, and i want to count the average number of words, for each line of the text file. Can someone tell me if my way of thinking is correct: Here's some pseudocode I think should do the trick once implemented:

double wordCount(String filepath){
  return Files.lines(Paths.get(filepath))
                          // make a wordarray of the line
                          // average the size of every wordarray with something like that
                              (collect(Collectors.averagingDouble())

Can someone please help me with that? How can I convert a line to a String array of words? How do I get the size of that array?

Thanks in advance!

1 Answer

Lukas Baumgartner
Lukas Baumgartner
14,817 Points
Lukas Baumgartner
Lukas Baumgartner
14,817 Points

I solved it myself like this:

double wordcount(String filepath){
    return Files.lines(Paths.get(filepath))
                                  .map(line -> line.split("\\s")
                                  .map(array -> array.length)
                                  .collect(Collectors.averagingDouble(Double::new));
}