Вроде считает "world'
package com.javarush.task.task19.task1907;
/*
Считаем слово
*/
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String fileName = reader.readLine();
//String fileName = "D:\\sdg.txt";
reader.close();
BufferedReader bf = new BufferedReader(new FileReader(fileName));
int count = 0;
while (bf.ready()) {
String data = bf.readLine();
String[] strings = data.split(",");
for (String s : strings) {
if (s.equals("world")) count += 1;
}
}
System.out.println(count);
bf.close();
}
}