![]() ![]() The logging output can be configured according to your needs. It generates textual messages, attaches some meta information like tags (describing the originating subsystem), a log level (describing the importance of the message), and time stamps before printing them somewhere. ![]() The JVM-internal, unified logging infrastructure is very similar to known logging frameworks like Log4j or Logback that you might have used for your application. The -Xlog option can be a bit intimidating, so in this post we will master it step by step, learning how to use it to select which messages and information to show. This gives uniform access to log messages from different subsystems such as class loading, threading, the garbage collector, the module system, or the interaction with the underlying operating system. Java 9 comes with a unified logging architecture ( JEP 158) that pipes a lot of messages that the JVM generates through the same mechanism, which can be configured with the -Xlog option. ![]()
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