Find specific word in text file and count it

Question

someone can help me with code? How to search in text file any word and count how many it were repeated?

For example test.txt:

hi
hola
hey
hi
bye
hoola
hi

And if I want to know how many times are repeated in test.txt word "Hi" program must say "3 times repeated"

I hope you understood what I want, thank you for answers.

Answer 1

public class Wordcount 
{
   public static void main(String[] args)
   {       
       int count=0;

       String str="hi this is is is line";

       String []s1=str.split(" ");

       for(int i=0;i<=s1.length-1;i++)
       {
          if(s1[i].equals("is"))
           {
               count++; 
           }
       }

       System.out.println(count);
   }
}

Answer 2

package com.test;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.Scanner;

public  class Test {

    public static void main(String[] args)  throws Exception{

        BufferedReader bf= new BufferedReader(new FileReader("src/test.txt"));
        Scanner sc = new Scanner(System.in);
        String W=sc.next();
        //String regex ="[\\w"+W+"]";
        int count=0;

        //Pattern p = Pattern.compile();
        String line=bf.readLine();
        String s[];
        do
        {
            s=line.split(" ");
            for(String a:s)
            {
                if(a.contains(W))
                    count++;

            }


            line=bf.readLine();


        }while(line!=null);
        System.out.println(count);
    }



}

Answer 3

Use MultiSet collection from google guava library.

Multiset<String> wordsMultiset = HashMultiset.create();
Scanner scanner = new Scanner(fileName);
while (scanner.hasNextLine()) {
    wordsMultiset.add(scanner.nextLine());
}
for(Multiset.Entry<String> entry : wordsMultiset ){
     System.out.println("Word : "+entry.getElement()+" count -> "+entry.getCount());
}

Answer 4

You can read text file line by line. I assume that each line can contain more than one word. For each line, you call:

String[] words = line.split(" "); 
for(int i=0; i<words.length; i++){
   if(words[i].equalsIgnoreCase(searhedWord))
         count++;
}

Answer 5

import java.io.*;
import java.util.*;

class filedemo
{
public static void main(String ar[])throws Exception
BufferedReader br=new BufferedReader(new FileReader("c:/file.txt"));
 System.out.println("enter the string which you search");
 Scanner ob=new Scanner(System.in);
 String str=ob.next();
 String str1="",str2="";
 int count=0;
while((str1=br.readLine())!=null)
 {
 str2 +=str1;

}  

 int index = str2.indexOf(str);

 while (index != -1) {
 count++;
 str2 = str2.substring(index + 1);
 index = str2.indexOf(str);
}

System.out.println("Number of the occures="+count);
}
}  

Answer 6

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;
}