Java.util.logging.Level的JavaDocs中提到:
按降序排列的级别依次为:
SEVERE
(最高值)WARNING
INFO
CONFIG
FINE
FINER
FINEST
(最低值)
来源
import java.util.logging.*;
class LoggingLevelsBlunder {
public static void main(String[] args) {
Logger logger = Logger.getAnonymousLogger();
logger.setLevel(Level.FINER);
System.out.println("Logging level is: " + logger.getLevel());
for (int ii=0; ii<3; ii++) {
logger.log(Level.FINE, ii + " " + (ii*ii));
logger.log(Level.INFO, ii + " " + (ii*ii));
}
}
}
输出
Logging level is: FINER
Jun 11, 2011 9:39:23 PM LoggingLevelsBlunder main
INFO: 0 0
Jun 11, 2011 9:39:24 PM LoggingLevelsBlunder main
INFO: 1 1
Jun 11, 2011 9:39:24 PM LoggingLevelsBlunder main
INFO: 2 4
Press any key to continue . . .
问题陈述
我的示例将Level
设置为FINER
,所以我期望每次循环都会看到2条消息。但实际上,每次循环只显示一条消息(Level.FINE
的消息消失了)。
问题
需要进行哪些更改才能看到FINE
(或FINER
或FINEST
)输出?
更新(解决方案)
感谢Vineet Reynolds的答案,这个版本符合我的预期。它显示3 x INFO
消息和3 x FINE
消息。
import java.util.logging.*;
class LoggingLevelsBlunder {
public static void main(String[] args) {
Logger logger = Logger.getAnonymousLogger();
// LOG this level to the log
logger.setLevel(Level.FINER);
ConsoleHandler handler = new ConsoleHandler();
// PUBLISH this level
handler.setLevel(Level.FINER);
logger.addHandler(handler);
System.out.println("Logging level is: " + logger.getLevel());
for (int ii=0; ii<3; ii++) {
logger.log(Level.FINE, ii + " " + (ii*ii));
logger.log(Level.INFO, ii + " " + (ii*ii));
}
}
}