// WordCount.java
// Count how many words are in a file of text
// P. Conrad, for UCSB CS5JA, 03/05/2008

import java.util.Scanner; // for Scanner
import java.io.*; // for reading from files


public class WordCount
{
    public static void main(String args[])
    {
	Scanner fileInput = null;

	// Make sure there is exactly one argument

	if (args.length!=1) {
	    System.out.println("Error: you should pass exactly one argument");
	    System.out.println("That argument should be the filename");
	    System.exit(1); // non zero status code signifies an error
	}

	// Store the first argument in the variable "filename"

	String filename = args[0];

	// Try to open the file

	try {
	    fileInput =
		new Scanner(new BufferedReader(new FileReader(filename)));
	} catch (IOException e) {
	    System.out.println("Error: could not open " + filename);
	    System.out.println("The error was " + e.toString());
	    System.exit(2); // error number two!
	}		   

	System.out.println("Successfully opened the file " + filename);
	System.out.println("Now, we'll count the lines...");

	// If that worked, read through every line in the file
	// and count how many there are

	int lines = 0; // start counter at zero
	int words = 0; // start counter at zero

	while (fileInput.hasNextLine()) {
	    lines++; // count this line
	    String thisLine = fileInput.nextLine(); // read it and move past it

	    // count the words
	    int thisLinesWordCount =  howManyWords(thisLine);
	    System.out.println("the line |" + thisLine + "| has " +
			       thisLinesWordCount + " words");
	    
	    // add that to the count
	    
	    words += thisLinesWordCount;
	}

	// Output the result

	System.out.println("This file has " + lines + " lines of text");
	System.out.println("This file has " + words + " words of text");

    }
    
    // return how many words are on a given line

    int howManyWords(String line) {
	String theWords[] = line.split("\\s"); // splits on 'whitespace'
	return theWords.length;
    }
	

}