Logger why static

This allows you to configure which message types are written. The java. Logback is a logging framework for Java applications, created as a successor to the popular log4j project. In fact, both of these frameworks were created by the same developer. There are several reasons why Logback is a great choice for a logging framework. This method is used to forward logs to all the registered output Handler objects.

INFO message: Info is for the use of administrators or advanced users. It denotes mostly the actions that have lead to a change in state for the application.

Logging is used to store exceptions, information, and warnings as messages that occur during the execution of a program. Logging helps a programmer in the debugging process of a program. Java provides logging facility in the java. If you want to print the value of a variable at any given point, you might call Logger. This combination of a configurable logging level and logging statements within your program allow you full control over how your application will log its activity.

Log4j , Logback , and Log4j2 are good logging frameworks that are broadly used. So which one should you use? I recommend using Log4j2 because it's the fastest and most advanced of the three frameworks. Logback is still a good option, if performance is not your highest priority. A Logger object is used to log messages for a specific system or application component. Loggers are normally named, using a hierarchical dot-separated namespace. Logger names can be arbitrary strings, but they should normally be based on the package name or class name of the logged component, such as java.

Typically, the steps to use log4j in your Java application are as follows: Download latest log4j distribution.

Add log4j's jar library into your program's classpath. Create log4j's configuration. Initialize log4j with the configuration. Create a logger. Why are the buttons shifted left?

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In the example above there are two Loggers declared. One is static and one is non-static. When looking at the results it is clear that the outcomes would be exactly the same regardless of whether how the loggers are declared.

The name of the logger will always originate from the class in which it is created and the Class name in each log event will always reflect the Class from which the logging method was called. It should be noted that there is a substantial performance penalty for printing the location information class name, method name, and line number.

If the method name and line number are not important it is usually better to make sure that each class has its own Logger so the logger name accurately reflects the class performing the logging. Usage Static vs Non-Static Loggers As with any variable in Java, Loggers may be declared as static variables or class member variables. Once a Logger is created it will not be deleted until the LoggerContext it is associated with is deleted.

Typically, this will only happen when the application is shut down or un-deployed. Each call to getLogger with the same logger name will return the same Logger instance. Thus, there is very little difference between a static or non-static Logger.

There is no behavioral difference between a static and non-static Logger.