Java Program to find the most repeated word in a text file

In this program, we need to find the most repeated word present in given text file. This can be done by opening a file in read mode using file pointer. Read the file line by line. Split a line at a time and store in an array. Iterate through the array and find the frequency of each word and compare the frequency with maxcount. If frequency is greater than maxcount then store the frequency in maxcount and corresponding word that in variable word. The content of data.txt file used in the program is shown below.

data.txt

A computer program is a collection of instructions that performs specific task when executed by a computer.

Computer requires programs to function.

Computer program is usually written by a computer programmer in programming language.

A collection of computer programs, libraries, and related data are referred to as software.

Computer programs may be categorized along functional lines, such as application software and system software.

Algorithm

STEP 1: START
STEP 2: DEFINE String line, word = ""
STEP 3: SET count =0, maxCount =0
STEP 4: DEFINE ArrayList<String> words
STEP 5: USE File Reader to open file in read mode.
STEP 6: READ line from file
STEP 7: By looping, CONVERT each line into lower case.
STEP 8: REMOVE the punctuation marks.
STEP 9: SPLIT the lines and STORE in array string[].
STEP 10: ADD all words generated in previous step into words.
STEP 11: SET i=0.REPEAT STEP 12 to STEP 17 UNTIL i<words.size()
STEP 12: SET count =1
STEP 13: SET j=i+1.REPEAT STEP 14 to 15 STEP UNTIL j<words.size()
STEP 14: IF(words.get(i).equals(words.get(j))) then count = count+1.
STEP 15: j = j+1
STEP 16: IF count>maxCount
then
maxCount = count
word =words.get(i)
STEP 17: i=i+1
STEP 18: PRINT word
STEP 19: END

Program:

import java.io.BufferedReader;  
import java.io.FileReader;  
import java.util.ArrayList;  
   
public class MostRepeatedWord {  
      
    public static void main(String[] args) throws Exception {  
        String line, word = "";  
        int count = 0, maxCount = 0;  
        ArrayList<String> words = new ArrayList<String>();  
          
        //Opens file in read mode  
        FileReader file = new FileReader("data.txt ");  
        BufferedReader br = new BufferedReader(file);  
          
        //Reads each line  
        while((line = br.readLine()) != null) {  
            String string[] = line.toLowerCase().split("([,.\\s]+) ");  
            //Adding all words generated in previous step into words  
            for(String s : string){  
                words.add(s);  
            }  
        }  
          
        //Determine the most repeated word in a file  
        for(int i = 0; i < words.size(); i++){  
            count = 1;  
            //Count each word in the file and store it in variable count  
            for(int j = i+1; j < words.size(); j++){  
                if(words.get(i).equals(words.get(j))){  
                    count++;  
                }   
            }  
            //If maxCount is less than count then store value of count in maxCount   
            //and corresponding word to variable word  
            if(count > maxCount){  
                maxCount = count;  
                word = words.get(i);  
            }  
        }  
          
        System.out.println("Most repeated word: " + word);  
        br.close();  
    }  
}  

Output: