Java File Handling

Question

Hi Genious,
I m maintaining a error log file in my java application.now i want as soon log file exceed size limit 1024 kb. a new file should be created in same folder with datetime stamp.
pls give any me any idea how to achieve same ASAP.

Answer 1

long fileSize = currentLogFile.length();
// bytes to kb - 1048576 = 1024 * 1024
if (filesize >= 1048576)
To continue to log, depending on your code...you would probably need to close your streams from the old file, close the file, then create a new file with the new stamp.
For example, if you had a simple log method:
private void log (String tempString)
if (logFile.length > 1048576)
pbuffer.close();
logFile.close();
DateFormat df = new SimpleDateFormat("ddMMyy");
String tempString = df.format(calendar.getTime());
File file = new File("C:/log" + tempString + System.currentTimeMillis() + ".txt");
pbuffer = new BufferedWriter(new FileWriter(file.getName()));
pbuffer.write(tempString);
}The example depends on what you are using to write the file...here I am just using a simple BufferedWriter to do all the file writing. Maybe this will help you however. :)