OnJava8-Examples/logging/LoggingLevels.java
Bruce Eckel bc0026c3e1 Radically reorganized
Plus many new examples in "streams" chapter.
2015-11-11 20:20:04 -08:00

56 lines
1.6 KiB
Java

// logging/LoggingLevels.java
import java.util.logging.Level;
import java.util.logging.Logger;
public class LoggingLevels {
private static Logger
lgr = Logger.getLogger("com"),
lgr2 = Logger.getLogger("com.mindviewinc"),
util= Logger.getLogger("onjava"),
test= Logger.getLogger("com.mindviewinc.test"),
rand = Logger.getLogger("random");
private static void logMessages() {
lgr.info("com : info");
lgr2.info("com.mindviewinc : 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();
}
}
/* Output:
com level: SEVERE
individual loggers set to FINEST
com level: SEVERE
___[ Error Output ]___
Jun 15, 2015 3:47:52 PM LoggingLevels logMessages
SEVERE: test : severe
Jun 15, 2015 3:47:52 PM LoggingLevels logMessages
INFO: random : info
Jun 15, 2015 3:47:52 PM LoggingLevels logMessages
INFO: util : info
Jun 15, 2015 3:47:52 PM LoggingLevels logMessages
SEVERE: test : severe
Jun 15, 2015 3:47:52 PM LoggingLevels logMessages
INFO: random : info
Jun 15, 2015 3:47:52 PM LoggingLevels logMessages
INFO: util : info
Jun 15, 2015 3:47:52 PM LoggingLevels logMessages
SEVERE: test : severe
Jun 15, 2015 3:47:52 PM LoggingLevels logMessages
INFO: random : info
*/