Counting number of paragraphs in text file using java

Java Programming Java8Object Oriented Programming

We can read paragraphs in a file by reading it in a string and then spilting based on "\r\n" pattern. See the example below −

Example

Consider the following text file in the classpath.

test.txt

This is Line 1

This is Line 2
This is Line 3

This is Line 4
This is Line 5

This is Line 6
This is Line 7

This is Line 8
This is Line 9
This is Line 10

Tester.java

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class Tester {
   public static void main(String args[]) throws IOException {
      FileUtil fileUtil = new FileUtil();
      System.out.println("No. of paragraphs in file: " + fileUtil.getParaCount());
   }
}

class FileUtil {
   private static final String FILE_PATH = "data.txt";
   
   public static int getParaCount() throws IOException {
      File file = new File(FILE_PATH);
      FileInputStream fileStream = new FileInputStream(file);
      byte[] byteArray = new byte[(int)file.length()];
      fileStream.read(byteArray);
      String data = new String(byteArray);

      String[] paragraphs = data.toString().split("\r\n\r\n");

      return paragraphs.length;
   }
}

This will produce the following result −

Output

No. of paragraphs in file: 5
raja
Published on 26-Jul-2018 12:37:23
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