помогите пж решить задачку
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 name = reader.readLine();
FileReader filereader = new FileReader(name);
reader.close();
String res = "";
while (filereader.ready()) {
res = res + (char) filereader.read();
}
filereader.close();
String[] array = res.split("\\bworld\\b");
System.out.println(array.length);
}
}