Number of lines in a file in Java

Question

I use huge data files, sometimes I only need to know the number of lines in these files, usually I open them up and read them line by line until I reach the end of the file<

Answer 1

I tested the above methods for counting lines and here are my observations for Different methods as tested on my system

File Size : 1.6 Gb Methods:

1. Using Scanner : 35s approx
2. Using BufferedReader : 5s approx
3. Using Java 8 : 5s approx
4. Using LineNumberReader : 5s approx

Moreover Java8 Approach seems quite handy :

Files.lines(Paths.get(filePath), Charset.defaultCharset()).count()
[Return type : long]