Question

Lets say I have 10 lines in a file. I have 2 parameters that specify the beginning and ending of a index.

StartIndex = 2 // specifies the first 2 lines

EndIndex = 3 // specifies the last 3 lines

I need to read the lines in between. I know maintaining index and skipping is one of the ways…but are there any other efficient ways (even with external libraries)?

Thanks

Answer 1

Using the commons IO you can do it easily, but it is not efficient because it will load the whole file in memory.

File file = new File("myfile.txt");
List lines = FileUtils.readLines(file).subList(2,3);

http://commons.apache.org/io/