API for simple File (line count) functions in Java

Question

Hi : Given an arbitrary file (java), I want to count the lines.

This is easy enough, for example, using Apache\'s FileUtils.readLines(...) method...

Howeve

Answer 1

Here's a version that makes use of Apache Commons IO library. You can pass null for encoding to pick the platform default.

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.LineIterator;

public static long countLines(String filePath, String encoding)
throws IOException {
    File file = new File(filePath);
    LineIterator lineIterator = FileUtils.lineIterator(file, encoding);
    long lines = 0;
    try {
        while ( lineIterator.hasNext() ) {
            lines++;
            lineIterator.nextLine();
        }
    } finally {
        LineIterator.closeQuietly( lineIterator );
    }
    return lines;
}