error in retrieving from file.

[gayathri murugesan]

 
  File myF=new File("folderwithmsg.txt");
                 FileReader is1=new FileReader(myF);
                 BufferedReader reader1=new BufferedReader(is1);
                 String line1=null;
                 check=reader1.read();
                 if(!(check==-1))
                 {
                 System.out.println("THE FILE IS NOT EMPTY");
                 while((line1=reader1.readLine())!=null)
                 {
                   System.out.println("THE CONTENTS FROM FILE IS:"+line1);
                  if(line1.equals(fName))
                  {
                   
                    System.out.println("THEY ARE EQUAL");
                    flag=false;
                    break;
                  } 
                 }
                 }
                 else
                 {
                 System.out.println("THE FILE IS EMPTY");
                 flag=true;
                 }  

tha actual contents of the file is

business
personal

but my output is

THE CONTENTS FROM FILE IS:usiness
THE CONTENTS FROM FILE IS:personal

so that when i enter business it doesn't go in to the loop which checks for equality.

please help.

[Ulf Dittmer]

The first character is eaten by the "check=reader1.read()" statement. I don't think you need that anyway - you can check the file for being empty via "myF.length() == 0".

[David Newton]

Look at the Javadocs for BufferedReader's read() method: what do you expect to happen?

[gayathri murugesan]

i would like to retrieve the contents from folderwithmsg.txt file and then compare with the fileName given by user.if the filename is not present in the text file,i should write in the text file.otherwise i should not.as the first character is being omitted,whenever the filename equals the first name in the text file ,it is writing in the file.

[David Newton]

You were already told why the first character is being read, given a link to the documentation to prove it, and provided a workaround--what else do you need?

[gayathri murugesan]

with length method also i m getting the same type of problem.

[David Newton]

I think you should take a step back and re-examine the problem, and the hints you've been given.

[pramod reddy]

Hello gayathri murugesan ;

just go through my code and find mistake..
this code is working........

import java.util.*;
import java.io.*;
public class FileCompare {
	                  String line1=null; 
                      Boolean flag ;
                      String fname ="filecompare"; 
	             
	                  File myf;
public static void main(String [] args)
	{
	    FileCompare fc = new FileCompare();
	}
	       FileCompare()
	          {
	            try
	            {
	            	 myf=new File("filecompare.txt");  
	                 BufferedReader reader1=new BufferedReader(new FileReader(myf));  
	            	
	            	
	            if(!(myf.length()==0)) 
	              {  
	                 System.out.println("THE FILE IS NOT EMPTY");  
	                  while((line1=reader1.readLine())!=null)  
                      {  
	                    System.out.println("THE CONTENTS FROM FILE IS:"+line1);  
	                   if(line1.equals(fname))  
                       {  
                      
	                     System.out.println("THEY ARE EQUAL");  
                         flag=false;  
	                     break;  
                       }   
	              }  
	                  }  
	                
	            	else  
                  {  
	                 System.out.println("THE FILE IS EMPTY");  
	                 flag=true;  
                 }    
	            	   }
	            	   catch(Exception ex)
	            	   {ex.printStackTrace();}
	  }
}