import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class BufferedReaderExample {
    public static void main(String[] args) {
        long startTime = System.nanoTime();
        try (BufferedReader reader = new BufferedReader(new FileReader("largefile.txt"))) {
            String line;
            while ((line = reader.readLine()) != null) {
                // Process the line
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        long endTime = System.nanoTime();
        System.out.println("BufferedReader Time: " + (endTime - startTime) + " ns");
    }
}

import org.apache.commons.io.FileUtils;
import java.io.File;
import java.io.IOException;
import java.util.List;

public class ApacheCommonsIOExample {
    public static void main(String[] args) {
        long startTime = System.nanoTime();
        File file = new File("largefile.txt");
        try {
            List<String> lines = FileUtils.readLines(file, "UTF-8");
            // Process the lines
        } catch (IOException e) {
            e.printStackTrace();
        }
        long endTime = System.nanoTime();
        System.out.println("Apache Commons IO Time: " + (endTime - startTime) + " ns");
    }
}

For large files: BufferedReader might offer better performance due to lower overhead.
For many small files: BufferedReader can be more efficient as the overhead of Apache Commons IO might add up.
For convenience and simplicity: Apache Commons IO is often preferred despite the potential slight performance hit.

具体结果明天给