Logging Levels : Log « Language Basics « Java

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Logging Levels

    
// : c15:LoggingLevels.java
//From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
//www.BruceEckel.com. See copyright notice in CopyRight.txt.

import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.Handler;
import java.util.logging.LogManager;

public class LoggingLevels {
  private static Logger lgr = Logger.getLogger("com"), lgr2 = Logger
      .getLogger("com.bruceeckel"), util = Logger
      .getLogger("com.bruceeckel.util"), test = Logger
      .getLogger("com.bruceeckel.test"), rand = Logger
      .getLogger("random");

  private static void logMessages() {
    lgr.info("com : info");
    lgr2.info("com.bruceeckel : info");
    util.info("util : info");
    test.severe("test : severe");
    rand.info("random : info");
  }

  public static void main(String[] args) {
    lgr.setLevel(Level.SEVERE);
    System.out.println("com level: SEVERE");
    logMessages();
    util.setLevel(Level.FINEST);
    test.setLevel(Level.FINEST);
    rand.setLevel(Level.FINEST);
    System.out.println("individual loggers set to FINEST");
    logMessages();
    lgr.setLevel(Level.SEVERE);
    System.out.println("com level: SEVERE");
    logMessages();
  }
} ///:~



           
         
    
    
    
  

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