Еще одну решил , надо-же ...

import java.io.*; import java.util.*; /* Считаем слово */ public class Solution { public static void main(String[] args) { try{ BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String fn1=br.readLine(); br.close(); String s=read(fn1); StringTokenizer st=new StringTokenizer(s," .,?!;:+-*=/()[]{}<>|``\n\r\t"); int x=0; while(st.hasMoreTokens()){ if(st.nextToken().equals("world")){ x++; } } System.out.println(x); }catch(Exception e){} } public static String read(String fn){ String s=""; try{ BufferedReader br=new BufferedReader(new FileReader(fn)); while(br.ready()){ s+=(char)br.read(); } br.close(); }catch(Exception e){} return s; } public static void write(String fn, String s){ try{ BufferedWriter bw=new BufferedWriter(new FileWriter(fn)); bw.write(s.toCharArray()); bw.close(); }catch(Exception e){} } }