BufferedReader

[vidhya.sk]

Hi everyone!

I am using BufferedReader to read a textfile and finding the time taken to read the file.

The time taken to read kept varying from one run to another in a random
manner.Can anyone tell me what could be the reason behind it?
code:

import java.io.*;
class fileread{
public static void main(String args[]) throws IOException
{
BufferedReader br = new BufferedReader(new FileReader("c:\\\\sourcefile.dat"));
long start;
long end;
String str;
start = System.currentTimeMillis();
while((str = br.readLine()) != null)
{

}
end = System.currentTimeMillis();

System.out.println("time taken " + (end-start));


}
}

Run1 - 938 ms
Run2 - 929 ms
Run3 - 923 ms
Run4 - 939 ms
Run5 - 922 ms.


Thank you!

[nishant]

hi....this what i understood from your last message.....might this help!
to check the time taken to read the file.



public class TokenizeFile {

public static void main(String[] args) throws Exception {
File file = new File("hugefile.txt");
BufferedReader br = new BufferedReader(new FileReader(file));

StopWatch stopWatch = new StopWatch();

stopWatch.start();

String line = null;
long totalLinesProcessed = 0l;

while((line=br.readLine())!=null){
totalLinesProcessed ++;
StringUtils.split(line, "|");
}


stopWatch.stop();

br.close();

System.out.println("Total lines processed = "+totalLinesProcessed+" Time taken = "+stopWatch.getTime() +" ms");
}
}

[Norm]

time taken to read kept varying

What else was your OS doing while the program was running? If the OS does something during your program, that will change the timings.