Java by API/java.util.logging/StreamHandler

extends StreamHandler

   <source lang="java">
 

import java.util.logging.Handler; import java.util.logging.Level; import java.util.logging.LogRecord; import java.util.logging.Logger; import java.util.logging.StreamHandler; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main {

 public static void main(String args[]) {
   Logger log = Logger.getAnonymousLogger();
   setLoggerhandler(log);
   log.finest(new Exception().toString());
 }
 public static void setLoggerhandler(Logger logger) {
   Handler handler = new ExceptionHandler();
   logger.addHandler(handler);
   logger.setLevel(Level.ALL);
 }

} class ExceptionHandler extends StreamHandler {

 public void publish(LogRecord record) {
   String msg = record.getMessage();
   int exceptionIndex = msg.indexOf("Exception");
   if (exceptionIndex > -1) {
     Pattern pattern = Pattern.rupile("(.*Exception.*)");
     Matcher matcher = pattern.matcher(msg);
     if (matcher != null && matcher.find()) {
       String err = "EXCEPTION FOUND " + matcher.group(1);
       System.out.println(err);
     }
   }
 }

}

 </source>
   
  
 
  

StreamHandler: flush()

   <source lang="java">
 

import java.util.logging.FileHandler; import java.util.logging.Level; import java.util.logging.LogRecord; import java.util.logging.XMLFormatter; public class Main {

 public static void main(String args[]) throws Exception{
   XMLFormatter formatter = new XMLFormatter();
   LogRecord record = new LogRecord(Level.INFO, "XML message..");
   FileHandler handler = new FileHandler("newxml.xml");
   handler.setFormatter(formatter);
   handler.publish(record);
   handler.flush();
 }

}

 </source>