Thread: Program to find the number of occurrences of words in the text file

Originally Posted by Sambit

As per previous replies, nested for-loop needs modification for calculating the occurance of words in a file.

Once you get all the words from file, try using either a map or java class (i.e. haivng 2 members as WORD and COUNT) to store word and its count. This would be easy for writing the logic.

If you want to calculate the words of same root (i.e. words starting with a fixed character set. Ex- TALL, TALLer, TALLest), then you can try Regular Expression. There can be other better approach for such scenario. Please could you clarify if I misunderstood you?

Yes you are right you have understood my need correctly here is my updated code still i am confused about using Regular Expression.

import java.io.*;
import java.util.*;
 
class FrequencyCounter {
 
    public static void main(String[] args) {
        System.out.println("Enter the file path to analyse:");
        Scanner scan = new Scanner(System.in);
        String path = scan.nextLine();//Files present in this path will be analysed to count frequency
        File directory = new File(path);
        File[] listOfFiles = directory.listFiles();//To get the list of file-names found at the "directoy"
        BufferedReader br = null;
        String words[] = null;
        String line;
        String files;
        Map<String, Integer> wordCount = new HashMap<String, Integer>();
        for (File file : listOfFiles) {
            if (file.isFile()) {
                files = file.getName();
                if (files.endsWith(".txt") || files.endsWith(".TXT")) {
                    try {
                        br = new BufferedReader(new FileReader(files));
                        try {
                            while ((line = br.readLine()) != null) {
                                line = line.toLowerCase();
                                words = line.split("\\s+");
                            }
                        } catch (NullPointerException e) {
                            System.out.println("I could'nt read your files:" + e);
                        }
                    } catch (IOException e) {
                        System.out.println("I could'nt read your files:" + e);
                    }
                }
            }
        }
 
        for (String read : words) {
 
            Integer freq = wordCount.get(read);
            wordCount.put(read, (freq == null) ? 1 : freq + 1);
        }
 
        System.out.println(wordCount.size() + " distinct words:");
        System.out.println(wordCount);
    }
}

Now also posted here.

What about how to search in text file any word and count how many it were repeated? Can try this one...

public int countWord(String word, File file) {
int count = 0;
Scanner scanner = new Scanner(file);
while (scanner.hasNextLine()) {
String nextToken = scanner.next();
if (nextToken.equalsIgnoreCase(word))
count++;
}
return count;
}