Module java.logging

Class ConsoleHandler

public class ConsoleHandler
extends StreamHandler
This Handler publishes log records to System.err. By default the SimpleFormatter is used to generate brief summaries.

Configuration: By default each ConsoleHandler is initialized using the following LogManager configuration properties where <handler-name> refers to the fully-qualified class name of the handler. If properties are not defined (or have invalid values) then the specified default values are used.

  • <handler-name>.level specifies the default level for the Handler (defaults to Level.INFO).
  • <handler-name>.filter specifies the name of a Filter class to use (defaults to no Filter).
  • <handler-name>.formatter specifies the name of a Formatter class to use (defaults to java.util.logging.SimpleFormatter).
  • <handler-name>.encoding the name of the character set encoding to use (defaults to the default platform encoding).

For example, the properties for ConsoleHandler would be:

  • java.util.logging.ConsoleHandler.level=INFO
  • java.util.logging.ConsoleHandler.formatter=java.util.logging.SimpleFormatter

For a custom handler, e.g., the properties would be:

  • Constructor Details

    • ConsoleHandler

      public ConsoleHandler()
      Create a ConsoleHandler for System.err.

      The ConsoleHandler is configured based on LogManager properties (or their default values).

  • Method Details

    • publish

      public void publish​(LogRecord record)
      Publish a LogRecord.

      The logging request was made initially to a Logger object, which initialized the LogRecord and forwarded it here.

      publish in class StreamHandler
      record - description of the log event. A null record is silently ignored and is not published
    • close

      public void close()
      Override StreamHandler.close to do a flush but not to close the output stream. That is, we do not close System.err.
      close in class StreamHandler