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Thread: BufferedReader
- 09-18-2008, 12:40 PM #1
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BufferedReader
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!
- 09-18-2008, 12:57 PM #2
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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");
}
}
- 09-18-2008, 02:57 PM #3
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