Split a large txt file in several files containing x lines in java 7

SplitLargeTxt.java

/*
Copyright (c) 2013, Gheorghita Stanciu gheorghita(dot)stanciu(at)gmail(dot)com
All rights reserved.
 
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import java.io.File;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

class SplitLargeTxt {
    
    public static void main(String[] args) throws IOException {
        if (args.length < 2) {
            System.out.println("Usage: java SplitLargeTxt filename numberOfLinesPerfile");
            return;
        }
        
        String fileName = args[0];
        int n = Integer.valueOf(args[1]);
        int i = 0;
        int fileNumber = 0;
        
        String name;
        
        File file = new File(fileName);
        String absolutePath = file.getAbsolutePath();
        name = file.getName();
        name = name.substring(0, name.lastIndexOf(".txt"));
        String filePath = absolutePath.substring(0, absolutePath.lastIndexOf(name));
        
        Path path = Paths.get(fileName);
        try (BufferedReader reader = Files.newBufferedReader(path, StandardCharsets.UTF_8)) {
            
            while (true) {
                String line = null;
                
                Path newPath = Paths.get(filePath + name + String.format("%04d", fileNumber) + ".txt");
                try (BufferedWriter writer = Files.newBufferedWriter(newPath, StandardCharsets.UTF_8)) {
                    while ((line = reader.readLine()) != null) {
                        i++;
                        
                        writer.write(line);
                        writer.newLine();
                        
                        if (i == n) {
                            i = 0;
                            fileNumber++;
                            break;
                        }
                    }
                }
                
                if (line == null)
                    break;
            }
        }
    }
}