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Write Log Records to Standard Error in Java

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This section demonstrates how to write log records to standard error in Java. Java provides the facility for handling an error through the help of ConsoleHandler class.

Write Log Records to Standard Error in Java

     

This section demonstrates how to write log records to standard error in Java. Java provides the facility for handling an error through the help of ConsoleHandler class. This program constructs a logger and prints or publishes log records on the standard error which is written in the log file by user. In this section section, you can learn the procedure of writing log records to standard error for displaying in the console.

Description of code:

ConsoleHandler:
This is the class of the java.util.logging package. This class is used for constructing the log file and write some log records to standard error publishing in the console. This type of error is published through the System.err which are written to log records i.e. handled by the ConsoleHandler class.

log.addHandler(Handler err)
This is the method of the Logger class which is used to add handler for receiving logging messages. This method takes a parameter which is the Handler type argument whether a console handle or any other.

Here is the code of program:

import java.util.logging.*;

public class WriteRecordsToStdError{
  public static void main(String[] args) {
  WriteRecordsToStdError r = new WriteRecordsToStdError();
  }
  public WriteRecordsToStdError(){
  ConsoleHandler err = new ConsoleHandler();
  Logger log = Logger.getLogger("");
  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!");
  err.publish(rec1);
  err.publish(rec2);
  err.publish(rec3);
  log.addHandler(err);
  }
}

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Posted on: February 22, 2008

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