Package java.util.logging

Class Level

  • public class Level
extends Object
    Level defines a set of standard logging levels. The Level objects are ordered thanks to integer values. Levels are used to control logging output. Enabling logging at a given level also enables logging at all higher levels.

    Clients should normally used the predefined Level constants provided by this class. These levels are, from highest to lowest:

    • SEVERE
    • WARNING
    • INFO
    • CONFIG
    • FINE
    • FINER
    • FINEST
    There are also two special levels:
    • ALL to enable logging all messages.
    • OFF to turn off logging.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static Level ALL
      ALL indicates that all messages should be logged.
      static Level CONFIG
      CONFIG is a message level for static configuration messages.
      static Level FINE
      FINE is a message level providing tracing information.
      static Level FINER
      FINER indicates a fairly detailed tracing message.
      static Level FINEST
      FINEST indicates a highly detailed tracing message.
      static Level INFO
      INFO is a message level for informational messages.
      static Level OFF
      OFF is a special level that can be used to turn off logging.
      static Level SEVERE
      SEVERE is a message level indicating a serious failure.
      static Level WARNING
      WARNING is a message level indicating a potential problem.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected Level​(String name, int value)
      Creates a named Level with the given integer value.

    • Field Detail

      • OFF

        public static final Level OFF
        OFF is a special level that can be used to turn off logging. This level is initialized to Integer.MAX_VALUE.

      • SEVERE

        public static final Level SEVERE
        SEVERE is a message level indicating a serious failure.

        In general SEVERE messages should describe events that are of considerable importance and which will prevent normal program execution. They should be reasonably intelligible to end users and to system administrators. This level is initialized to 1000.

      • WARNING

        public static final Level WARNING
        WARNING is a message level indicating a potential problem.

        In general WARNING messages should describe events that will be of interest to end users or system managers, or which indicate potential problems. This level is initialized to 900.

      • INFO

        public static final Level INFO
        INFO is a message level for informational messages.

        Typically INFO messages will be written to the console or its equivalent. So the INFO level should only be used for reasonably significant messages that will make sense to end users and system admins. This level is initialized to 800.

      • CONFIG

        public static final Level CONFIG
        CONFIG is a message level for static configuration messages.

        CONFIG messages are intended to provide a variety of static configuration information, to assist in debugging problems that may be associated with particular configurations. For example, CONFIG message might include the CPU type, the graphics depth, the GUI look-and-feel, etc. This level is initialized to 700.

      • FINE

        public static final Level FINE
        FINE is a message level providing tracing information.

        All of FINE, FINER, and FINEST are intended for relatively detailed tracing. The exact meaning of the three levels will vary between subsystems, but in general, FINEST should be used for the most voluminous detailed output, FINER for somewhat less detailed output, and FINE for the lowest volume (and most important) messages.

        In general the FINE level should be used for information that will be broadly interesting to developers who do not have a specialized interest in the specific subsystem.

        FINE messages might include things like minor (recoverable) failures. Issues indicating potential performance problems are also worth logging as FINE. This level is initialized to 500.

      • FINER

        public static final Level FINER
        FINER indicates a fairly detailed tracing message. By default logging calls for entering, returning, or throwing an exception are traced at this level. This level is initialized to 400.

      • FINEST

        public static final Level FINEST
        FINEST indicates a highly detailed tracing message. This level is initialized to 300.

      • ALL

        public static final Level ALL
        ALL indicates that all messages should be logged. This level is initialized to Integer.MIN_VALUE.

    • Constructor Detail

      • Level

        protected Level​(String name,
                int value)
        Creates a named Level with the given integer value.
        Parameters:
        name - the name of the level. For example "SEVERE".
        value - must be one the value above.

    • Method Detail

      • getName

        public String getName()
        Return the name of the level.
        Returns:
        the name.

      • intValue

        public int intValue()
        Return the integer value of the level. This value is useful to compare to level objects. The greater this number is, the highest the level is.
        Returns:
        the integer value for this level.

      • toString

        public String toString()
        Description copied from class: Object
        Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

        The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of: 

         getClass().getName() + '@' + Integer.toHexString(hashCode())
        Overrides:
        toString in class Object
        Returns:
        a string representation of the object.