In this article, we will count and print number of lines and words in a text file i.e.;
Counting & printing from text file:
- Number of lines
- Number of words
Sample text file:
Already, in one of the previous article we have discussed about counting & printing number of lines & words using Java 1.7 version
1. Count & Print number of Lines in a text file
- First, read file from source location using java.nio.file.Path & java.nio.file.Paths
- Then, read lines one-by-one using java.nio.file.Files
- Invoking count() method on static lines() method will return number of lines in the provided text file
- Finally, print line count to the console
CountLinesInFileUsingJava8.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | package in.bench.resources.count.lines.words;import java.io.IOException;import java.nio.file.Files;import java.nio.file.Path;import java.nio.file.Paths;public class CountLinesInFileUsingJava8 { public static void main(String[] args) { // local variables long lineCount = 0; Path path = null; // read file from root folder path = Paths.get("BRN.txt"); try { // read file and count no. of lines lineCount = Files.lines(path).count(); } catch (IOException ioex) { // handle exception ioex.printStackTrace(); } // print to console System.out.println("Number of lines is : " + lineCount); }} |
Output:
1 | Number of lines is : 4 |
2. Count & Print number of Words in a text file
- First, read file from source location using java.nio.file.Path & java.nio.file.Paths
- Then, read lines one-by-one using java.nio.file.Files and invoke parallel stream to process stream and count number of lines
- Inside Stream.flatMap() method, pass lines one-by-one and split on the basis of space which returns Arrays of Stream
- Invoking count() method on the above stream will return number of words in the provided text file
- Finally, print word count to the console
CountWordsInFileUsingJava8.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | package in.bench.resources.count.lines.words;import java.io.IOException;import java.nio.file.Files;import java.nio.file.Path;import java.nio.file.Paths;import java.util.Arrays;public class CountWordsInFileUsingJava8 { public static void main(String[] args) { // local variables long wordCount = 0; Path path = null; // read file from root folder path = Paths.get("BRN.txt"); try { // read file and count no. of words wordCount = Files.lines(path) .parallel() .flatMap(line -> Arrays.stream(line.trim().split(" "))) .count(); } catch (IOException ioex) { // handle exception ioex.printStackTrace(); } // print to console System.out.println("Number of words is : " + wordCount); }} |
Output:
1 | Number of words is : 41 |
Related Articles:
- Java 8 – Count and print number of lines and words in a text file
- Java 8 – Count and print number of repeated word occurrences in a text file
- Java 8 – Count and print number of repeated character occurrences in a String
- Java – Count and print number of words and lines in a text file
- Java – Count and print number of repeated word occurrences in a String
- Java – Count and print number of repeated character occurrences in a String
References:
- Files (Java Platform SE 8 ) (oracle.com)
- Paths (Java Platform SE 8 ) (oracle.com)
- Path (Java Platform SE 8 ) (oracle.com)
- Java – Count and print number of words and lines in a text file
Happy Coding !!
Happy Learning !!