BufferedReader??

[rikstar]

How do I create a buffered reader and how do I use them???
Cheers,
Rikstar

[Terence Doyle]

HI,
Basic Explanation
A BufferedReader is a "high-level" reader, that is it can't connect directly to a file or input stream. It is used to make more efficient use of low-level readers because they only read in bytes and chars whereas a BufferedReader can read Strings with the readLine() method. It also has some utility methods like skip(), reset() etc.
The code below demonstrates searching a file for a string - it could be a list of passwords or something -. To make this work create a file called "MyFile.dat" in notepad and write a word or words on some lines. one of the lines should contain just "hello" (without the inverted commas). Put this file in the same directory as the BuffRead file.

import java.io.*;
public class BuffRead
{
    public static void main( String[] args )
    {
        try
        {
            //Create low-level FileReader to read in bytes
            // and convert to chars
            FileReader isr = new FileReader( "MyFile.dat" ) ;
            // Create high-level BufferedReader to handle lines 
            // and 'connect' the FileReader to it 
            BufferedReader buff = new BufferedReader( isr ) ;
            //The connection to the file is now open
            // so I can now procede to read in the lines
            // and search for the text I want example: "hello"
            int lineCounter = 1 ;
            while( buff.ready() )
            {
                if( buff.readLine().equals( "hello" ) )
                {
                    System.out.println( " Found it on line number " + lineCounter ) ;
                    break ; 
                }
                else
                {
                    System.out.print( ". " ) ; 
                    lineCounter ++;
                }
            }
            //Tidy up by closing the Readers in reverse order
            buff.close() ;
            isr.close() ;     
        }
        catch ( Exception e )
        {
            System.out.println( "Trouble! : " + e ) ;
        }
    }
}

Hope that helps,
------------------
Terry Doyle
Sun Certified Programmer for Java 2 Platform
[This message has been edited by Terence Doyle (edited October 10, 2001).]

[Cindy Glass]

rikstar,
I have asked you to change your ID before. Please change your name to be compliant with JavaRanch's naming policy.
Your ID should be 2 separate names with more than 1 letter each. We really want this to be a professional forum and would prefer that you use your REAL name.
Thanks,
Cindy