// validating/SLF4JLevels.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import org.slf4j.*;

public class SLF4JLevels {
  private static Logger log =
    LoggerFactory.getLogger(SLF4JLevels.class);
  public static void main(String[] args) {
    log.trace("Hello");
    log.debug("Logging");
    log.info("Using");
    log.warn("the SLF4J");
    log.error("Facade");
  }
}
/* Output:
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[main] TRACE SLF4JLevels - Hello
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[main] DEBUG SLF4JLevels - Logging
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[main] INFO  SLF4JLevels - Using
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[main] WARN  SLF4JLevels - the SLF4J
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[main] ERROR SLF4JLevels - Facade
*/