logginglevelmanipulation.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 45 行

//: X1:LoggingLevelManipulation.java
import com.bruceeckel.simpletest.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.Handler;
import java.util.logging.LogManager;

public class LoggingLevelManipulation {
  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");

  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) {
    SimpleTest monitor =
      new SimpleTest("LoggingLevelManipulation");
    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();
    monitor.expect(new String[] {
      "com level: SEVERE",
      "individual loggers set to FINEST",
      "com level: SEVERE"
    });
  }
} ///:~