Word, Character And Line Count Program In Java

Introduction

• In this blog, I am going to explain the program for word, character and line count in Java.

Software Requirements

• Java, Notepad.

Program

import java.io.*;

public class  WordCount{
    private static void linecount(String fName, BufferedReader in) throws IOException{
    long numChar = 0;
    long numLine=0;
    long numWords = 0;
    String line;
        do{
            line = in.readLine();
            if (line != null){
                numChar += line.length();
                numWords += wordcount(line);
                numLine++;
            }
        }while(line != null);
        System.out.println("File Name: " + fName);
        System.out.println("Number of characters: " + numChar);
        System.out.println("Number of words: " + numWords);
        System.out.println("Number of Lines: " + numLine);
    }
    private static void linecount(String fileName){
        BufferedReader in = null;
        try{
            FileReader fileReader = new FileReader(fileName);
            in = new BufferedReader(fileReader);
            linecount(fileName,in);
        }
        catch(IOException e){
            e.printStackTrace();
        }
    }
    private static long wordcount(String line){
        long numWords = 0;
        int index = 0;
        boolean prevWhiteSpace = true;
        while(index < line.length()){
            char c = line.charAt(index++);
            boolean currWhiteSpace = Character.isWhitespace(c);
            if(prevWhiteSpace && !currWhiteSpace){
                numWords++;
            }
            prevWhiteSpace = currWhiteSpace;
        }
        return numWords;
    }
    public static void main(String[] args){
        long numChar = 0;
        long numLine=0;
        String line;
        try{
            if (args.length == 0)
            {
                BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
                line = in.readLine();
                numChar = line.length();
                if (numChar != 0){
                    numLine=1;
                }
                System.out.println("Number of characters: " + numChar);
                System.out.println("Number of words: " + wordcount(line));
                System.out.println("Number of lines: " + numLine);
            }else{
                for(int i = 0; i < args.length; i++){
                    linecount(args[i]);
                }
            }
        }
        catch(IOException e){
            e.printStackTrace();
        }
    }
}

Output