Skip to content

Most visited

Recently visited

navigation

Level

public class Level
extends Object implements Serializable

java.lang.Object
   ↳ java.util.logging.Level


The Level class defines a set of standard logging levels that can be used to control logging output. The logging Level objects are ordered and are specified by ordered integers. Enabling logging at a given level also enables logging at all higher levels.

Clients should normally use the predefined Level constants such as Level.SEVERE.

The levels in descending order are:

  • SEVERE (highest value)
  • WARNING
  • INFO
  • CONFIG
  • FINE
  • FINER
  • FINEST (lowest value)
In addition there is a level OFF that can be used to turn off logging, and a level ALL that can be used to enable logging of all messages.

It is possible for third parties to define additional logging levels by subclassing Level. In such cases subclasses should take care to chose unique integer level values and to ensure that they maintain the Object uniqueness property across serialization by defining a suitable readResolve method.

Summary

Fields

public static final Level ALL

ALL indicates that all messages should be logged.

public static final Level CONFIG

CONFIG is a message level for static configuration messages.

public static final Level FINE

FINE is a message level providing tracing information.

public static final Level FINER

FINER indicates a fairly detailed tracing message.

public static final Level FINEST

FINEST indicates a highly detailed tracing message.

public static final Level INFO

INFO is a message level for informational messages.

public static final Level OFF

OFF is a special level that can be used to turn off logging.

public static final Level SEVERE

SEVERE is a message level indicating a serious failure.

public static final Level WARNING

WARNING is a message level indicating a potential problem.

Protected constructors

Level(String name, int value)

Create a named Level with a given integer value.

Level(String name, int value, String resourceBundleName)

Create a named Level with a given integer value and a given localization resource name.

Public methods

boolean equals(Object ox)

Compare two objects for value equality.

String getLocalizedName()

Return the localized string name of the Level, for the current default locale.

String getName()

Return the non-localized string name of the Level.

String getResourceBundleName()

Return the level's localization resource bundle name, or null if no localization bundle is defined.

int hashCode()

Generate a hashcode.

final int intValue()

Get the integer value for this level.

static Level parse(String name)

Parse a level name string into a Level.

final String toString()

Returns a string representation of this Level.

Inherited methods

From class java.lang.Object

Fields

ALL

Added in API level 1
Level ALL

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

CONFIG

Added in API level 1
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

Added in API level 1
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

Added in API level 1
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

Added in API level 1
Level FINEST

FINEST indicates a highly detailed tracing message. This level is initialized to 300.

INFO

Added in API level 1
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 administrators. This level is initialized to 800.

OFF

Added in API level 1
Level OFF

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

SEVERE

Added in API level 1
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

Added in API level 1
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.

Protected constructors

Level

Added in API level 1
Level (String name, 
                int value)

Create a named Level with a given integer value.

Note that this constructor is "protected" to allow subclassing. In general clients of logging should use one of the constant Level objects such as SEVERE or FINEST. However, if clients need to add new logging levels, they may subclass Level and define new constants.

Parameters
name String: the name of the Level, for example "SEVERE".
value int: an integer value for the level.
Throws
NullPointerException if the name is null

Level

Added in API level 1
Level (String name, 
                int value, 
                String resourceBundleName)

Create a named Level with a given integer value and a given localization resource name.

Parameters
name String: the name of the Level, for example "SEVERE".
value int: an integer value for the level.
resourceBundleName String: name of a resource bundle to use in localizing the given name. If the resourceBundleName is null or an empty string, it is ignored.
Throws
NullPointerException if the name is null

Public methods

equals

Added in API level 1
boolean equals (Object ox)

Compare two objects for value equality.

Parameters
ox Object: the reference object with which to compare.
Returns
boolean true if and only if the two objects have the same level value.

getLocalizedName

Added in API level 1
String getLocalizedName ()

Return the localized string name of the Level, for the current default locale.

If no localization information is available, the non-localized name is returned.

Returns
String localized name

getName

Added in API level 1
String getName ()

Return the non-localized string name of the Level.

Returns
String non-localized name

getResourceBundleName

Added in API level 1
String getResourceBundleName ()

Return the level's localization resource bundle name, or null if no localization bundle is defined.

Returns
String localization resource bundle name

hashCode

Added in API level 1
int hashCode ()

Generate a hashcode.

Returns
int a hashcode based on the level value

intValue

Added in API level 1
int intValue ()

Get the integer value for this level. This integer value can be used for efficient ordering comparisons between Level objects.

Returns
int the integer value for this level.

parse

Added in API level 1
Level parse (String name)

Parse a level name string into a Level.

The argument string may consist of either a level name or an integer value.

For example:

  • "SEVERE"
  • "1000"

Parameters
name String: string to be parsed
Returns
Level The parsed value. Passing an integer that corresponds to a known name (e.g., 700) will return the associated name (e.g., CONFIG). Passing an integer that does not (e.g., 1) will return a new level name initialized to that value.
Throws
NullPointerException if the name is null
IllegalArgumentException if the value is not valid. Valid values are integers between Integer.MIN_VALUE and Integer.MAX_VALUE, and all known level names. Known names are the levels defined by this class (e.g., FINE, FINER, FINEST), or created by this class with appropriate package access, or new levels defined or created by subclasses.

toString

Added in API level 1
String toString ()

Returns a string representation of this Level.

Returns
String the non-localized name of the Level, for example "INFO".
This site uses cookies to store your preferences for site-specific language and display options.

Hooray!

This class requires API level or higher

This doc is hidden because your selected API level for the documentation is . You can change the documentation API level with the selector above the left navigation.

For more information about specifying the API level your app requires, read Supporting Different Platform Versions.

Take a one-minute survey?
Help us improve Android tools and documentation.