помогите
package com.javarush.task.task19.task1907;
/*
Считаем слово
*/
import java.io.*;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
String file1 = r.readLine();
r.close();
FileReader fr = new FileReader(file1);
StringBuilder sb = new StringBuilder();
while(fr.ready()){
sb.append((char)fr.read());
}
fr.close();
String text = sb.toString();
Pattern p = Pattern.compile("world");
Matcher m = p.matcher(text);
int count = 0;
while (m.find()){
count++;
}
System.out.println(count);
}
}