Writing Log Records to a Log File
This section demonstrates for writing log records to a
log file. Logger provides different types of level like: warning, info and
severe that have log records. Log records are written into a log file that
follows certain steps to given bellow:
Description of program:
This program takes a file name and check it through the
exists() method. If the file
is exist then log records will be written into a log file and it displays a
message "Operation successfully!".
Otherwise shows a message "File is not
exist" and log records don't written into
a log file.
Description of code:
LogRecord(Level level, String message):
The above is a constructor of LogRecord
class of the java.util.logging package.
This class extends Object and implements Serializable. This constructor creates a LogRecord to specified
level and message.
hand.publish(LogRecord rec):
Above method takes LogRecord and publish it into
specific file that means log records are written into the given file.
Here is the code of program:
import java.io.*;
import java.util.logging.*;
public class WriteRecordsToLogFile{
public static void main(String[] args) {
WriteRecordsToLogFile w = new WriteRecordsToLogFile();
}
public WriteRecordsToLogFile(){
try{
BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter file name which has '.log' extension");
String str = buf.readLine();
File file = new File(str + ".log");
if(file.exists())
{
FileHandler hand = new FileHandler(str + ".log", true);
Logger log = Logger.getLogger("aman raj");
LogRecord rec1 = new LogRecord(Level.WARNING,"Do something here!");
LogRecord rec2 = new LogRecord(Level.INFO,"Do something here!");
LogRecord rec3 = new LogRecord(Level.SEVERE,"Do something here!");
hand.publish(rec1);
hand.publish(rec2);
hand.publish(rec3);
log.addHandler(hand);
System.out.println("Operation successfully!");
}
else{
System.out.println("File is not exist");
}
}
catch (IOException e){}
}
}
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Current Comments
1 comments so far (post your own) View All Comments Latest 10 Comments:When I tried to write to a log file using loggers, I am having a issue of creating new set of file. For an example if my initial file name is test.log, when my service restart, its creating new log file as test.log.1 and all the data is written to this new file. If there any solution to avoid that and make it to also written to my initial file.
Posted by diasmvds on Friday, 02.29.08 @ 13:38pm | #50691