// org.greggordon.util LineNumbers.java
// Outputs command line file.ext to new fileNUM.ext with lines numbered.
package org.greggordon.util;
import java.io.*;

public class LineNumbers {
	public static void main(String[] args) throws IOException {
		if(args.length != 1) {
			System.out.println("Usage: enter filename");
			System.exit(0);
		}
		String file = args[0];
		BufferedReader in = new BufferedReader(
			new FileReader(file));
		String[] temp = args[0].split("\\.");
		String fileOut = temp[0] + "NUM." + temp[1]; 
		PrintWriter out = new PrintWriter(fileOut);
		int lineCount = 1;
		String s;
		while((s = in.readLine()) != null )
			out.println(lineCount++ + " " + s);
		in.close();
		out.close();
		System.out.println("See file " + fileOut);
	}
}