AddLineNumbers.java

package org.wikijava.files;
 
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
 
/**
 * @author giulio
 * 
 */
public class AddLineNumbers {
 
    /**
     * @param args
     */
    public static void main(String[] args) {
	if (args.length < 1) {
	    System.out.println("usage: java -jar AddLineNumbers [file]+");
	    return;
	}
 
	File[] files = new File[args.length];
	for (int i = 0; i < args.length; i++) {
	    files[i] = new File(args[i]);
	}
 
	for (int i = 0; i < files.length; i++) {
	    if (files[i].isFile()) {
		try {
		    BufferedReader bufferedReader = new BufferedReader(
			    new FileReader(files[i]));
		    String cur = null;
		    long count = 1;
		    while ((cur = bufferedReader.readLine()) != null) {
 
			System.out.println(count + " " + cur);
			count++;
		    }
 
		    bufferedReader.close();
		} catch (IOException e) {
		    // TODO Auto-generated catch block
		    e.printStackTrace();
		}
	    }
	}
 
    }
 
}