My code below works perfect, just not sure how to promt user \"No Command line a

Question

My code below works perfect, just not sure how to promt user "No Command line arguments. Cannot proceed" if they dont enter there input and output from the command line.

import java.io.File;

import java.util.Formatter;

import java.util.Scanner;

public class question3b {

public static void main(String[] args)

{

String inpuFileName = args[0];

String outpuFileName = args[1];

System.out.printf("Processing Complete");

try {

Scanner input = new Scanner(new File(inpuFileName));

Formatter output = new Formatter(outpuFileName);

while (input.hasNext()) {

String line = input.nextLine();

String[] tokens = line.split("//");

output.format("%s ", tokens[0]); }

input.close(); output.close(); }

catch (Exception e) { e.printStackTrace();

System.exit(1); }

}

}

Explanation / Answer

you gotta check the length of the arguments... include this in your code... hope it helps. if(args.length == 0) { System.out.println("No Command line arguments. Cannot proceed."); System.exit(0); }

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