CODEWITHSUNDEEP
javaarraysstringindexing
Sune
Sune

Reputation: 1

How to find last non-empty index in an array

I am using an input file to populate my array with different strings. how do I check up to where the array is filled? I initialize the size of my array to 30000, but how do I check up to which index it contains a string?

Thank you for your help!

Upvotes: 0

Views: 609

Answers (1)

Ralf Kleberhoff
Ralf Kleberhoff

Reputation: 7290

Low-level approach: while populating the array, maintain a count variable, adding 1 to it on every element you insert into the array.

Professional approach: instead of an array, use a java.util.List, e.g. a java.util.ArrayList. List instances do the counting for you (and by the way, don't waste 25000 empty elements if your file only contains 5000).

Upvotes: 1

Related Questions