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Counting number of lines, words, characters and paragraphs in a text file using Java

  • Difficulty Level : Medium
  • Last Updated : 23 Aug, 2021

Counting the number of characters is important because almost all the text boxes that rely on user input have certain limit on the number of characters that can be inserted. For example, the character limit on a Facebook post is 63, 206 characters. Whereas, for a tweet on Twitter the character limit is 140 characters and the character limit is 80 per post for Snapchat.

Determining character limits become crucial when the tweet and Facebook post updates are being done through api’s. 

Note: This program would not run on online compilers. Please make a txt file on your system and give its path to run this program on your system.  


// Java program to count the
// number of characters in a file
public class Test {
    public static void main(String[] args)
        throws IOException
        File file = new File(
        FileInputStream fileInputStream
            = new FileInputStream(file);
        InputStreamReader inputStreamReader
            = new InputStreamReader(fileInputStream);
        BufferedReader bufferedReader
            = new BufferedReader(inputStreamReader);
        String line;
        int wordCount = 0;
        int characterCount = 0;
        int paraCount = 0;
        int whiteSpaceCount = 0;
        int sentenceCount = 0;
        while ((line = bufferedReader.readLine()) != null) {
            if (line.equals("")) {
                paraCount += 1;
            else {
                characterCount += line.length();
                String words[] = line.split("\\s+");
                wordCount += words.length;
                whiteSpaceCount += wordCount - 1;
                String sentence[] = line.split("[!?.:]+");
                sentenceCount += sentence.length;
        if (sentenceCount >= 1) {
        System.out.println("Total word count = "
                           + wordCount);
        System.out.println("Total number of sentences = "
                           + sentenceCount);
        System.out.println("Total number of characters = "
                           + characterCount);
        System.out.println("Number of paragraphs = "
                           + paraCount);
        System.out.println("Total number of whitespaces = "
                           + whiteSpaceCount);


Total word count = 5
Total number of sentences = 3
Total number of characters = 21
Number of paragraphs = 2
Total number of whitespaces = 7

In-built functions used 

1. File(String pathname): Creates a new File instance by converting the given pathname string into an abstract pathname. 


public File(String pathname)
pathname - A pathname string

2. FileInputStream(File file): Creates a FileInputStream by opening a connection to an actual file, the file named by the File object file in the file system. 


public FileInputStream(File file) throws FileNotFoundException
file - the file to be opened for reading.
FileNotFoundException - if the file does not exist, is a directory
rather than a regular file, or for some other reason
 cannot be opened for reading.
SecurityException - if a security manager exists and its
checkRead method denies read access to the file.

3. InputStreamReader(InputStream in): Creates an InputStreamReader that uses the default charset. 


public InputStreamReader(InputStream in)
in - An InputStream

4. BufferedReader(Reader in): Creates a buffering character-input stream that uses a default-sized input buffer. 


public BufferedReader(Reader in)
in - A Reader

This article is contributed by Mayank Kumar. If you like GeeksforGeeks and would like to contribute, you can also write an article using or mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

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