Java Program to calculate number of characters, words and lines while reading from a input stream (file or console)

import java.io.*;

class WordCount{

    public static int words = 0;

    public static int lines = 0;

    public static int chars = 0;

    public static void wc(InputStreamReader isr) throws IOException{

        int c = 0;

        boolean lastWhite = true;

        String WhiteSpace = " \t\n\r";

        while((c = isr.read()) != -1){

            chars++;

            if(c == '\n')

                lines++;

            int index = WhiteSpace.indexOf(c);

            if(index == -1){

                if(lastWhite == true){

                    ++words;

                }

            lastWhite = false;

            }

            else

                lastWhite = true;

        }

        if(chars != 0)

            ++lines;

    }

    public static void main(String args[]){

        FileReader fr;

        try{

            if(args.length == 0) {

                wc(new InputStreamReader(System.in));

            }

             

            else{

                for(int i=0; i

                    fr = new FileReader(args[i]);

                    wc(fr);

                }

            }

        }

        catch(IOException e){

            return;

        }

        System.out.println(lines + " " + words + " " + chars);

    }

}