java - String functions not working properly -

this program.it shouldnt print sentences starting word "ltp" or sentences containing word "trailing" ,but doesnt that..i dont understand why.please me this.

import java.io.*;  public class fileinputdemo {     public static void main(string args[]) {         // args.length equivalent argc in c         try {             // open file first             // command line parameter             fileinputstream fstream = new fileinputstream(                     "c:\\documents , settings\\work\\desktop\\new folder\\new folder\\02apr2013log1.txt");             // convert our input stream             // datainputstream             datainputstream in = new datainputstream(fstream);             // continue read lines while             // there still left read             while (in.available() != 0) {                 string s=in.readline();                 // print file line screen             if(s.startswith("ltp") || s.contains("trailing"))             {                 continue;             }              system.out.println(in.readline());             }              in.close();         } catch (exception e) {             system.err.println("file input error");         }     } } 

and output

long trade managers in list (from limit removal process) 2 ltp 9708.0 current stop 9723.0 order id baa0001 mode:- trailing 9711.0 9716.0 9707.0 9707.0 9710.62 bullishfactor [openbullishfactor=neutral, closebullishfactor=bearish, closetoopenfactor=moderate_bearish] barsharing [sharingtype=lllh, bodysharing=0.44] ltp 9707.0 current stop 9717.0 order id baa0001 mode:- trailing 

do not read line again in system.out.println(in.readline());. read next line , not check if ltp | trailing available on line. replace system.out.println(s);