java - How to read a txt file as my system.in using eclipse -

i'm working through problems on code chef. i'm stuck problem , says have wrong answer. want test program see output reads input text file , can't figure out how eclipse, code below:

import java.io.*; class holes {  public static void main(string[] args) throws ioexception{     // todo auto-generated method stub     bufferedreader r = new bufferedreader(new inputstreamreader(system.in));     int testcases = integer.parseint(r.readline());      (int =0; i<testcases; i++)     {         int holes = 0;         string s = r.readline();         (int j= 0; j< s.length(); j++)         {             char c = s.charat(j);             if (c == 'b')                 holes += 2;             else if (c== 'a' || c== 'd' ||c== 'o' ||c== 'p' ||c== 'q' ||c== 'r' )             {                 holes +=1;             }             system.out.println(holes);         }     }    }  } 

add folder eclipse project in folder add input file , read using bufferreader follows bufferedreader br = null;

try {      string scurrentline;      br = new bufferedreader(new filereader("yourfolder/theinputfile.txt"));      while ((scurrentline = br.readline()) != null) {         system.out.println(scurrentline);     }  } catch (ioexception e) {     e.printstacktrace(); } {     try {         if (br != null)br.close();     } catch (ioexception ex) {         ex.printstacktrace();     } } 

this 1 way other way pass path argument program shown bellow

try {          string scurrentline;          br = new bufferedreader(new filereader(args[0]));          while ((scurrentline = br.readline()) != null) {             system.out.println(scurrentline);         }      } catch (ioexception e) {         e.printstacktrace();     } {         try {             if (br != null)br.close();         } catch (ioexception ex) {             ex.printstacktrace();         }     } 

how when run application run configuration , there find args can add ever path in example c:\myinput.txt