Level (Java 2 Platform SE v1.4.1)

java.util.logging
Class Level
java.lang.Object
  |
  +--java.util.logging.Level
All Implemented Interfaces:
Serializable

public class Level
extends Object
implements Serializable

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.

Since:

1.4

See Also:
Serialized Form

Field Summary
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
protected Level(String name, int value)
    Create a named Level with a given integer value.
protected Level(String name, int value, String resourceBundleName)
    Create a named Level with a given integer value and a given localization resource name.

Method Summary
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.
int intValue()
    Get the integer value for this level.
static Level parse(String name)
    Parse a level name string into a Level.
String toString()
    Returns a string representation of the object.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

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)
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 - the name of the Level, for example "SEVERE".
value - an integer value for the level.

Level
protected Level(String name,
                int value,
                String resourceBundleName)
Create a named Level with a given integer value and a given localization resource name.

Parameters:
name - the name of the Level, for example "SEVERE".
value - an integer value for the level.
resourceBundleName - name of a resource bundle to use in localizing the given name (may be null).

Method Detail

getResourceBundleName
public String getResourceBundleName()
Return the level's localization resource bundle name, or null if no localization bundle is defined.

Returns:
localization resource bundle name

getName
public String getName()
Return the non-localized string name of the Level.

Returns:
non-localized name

getLocalizedName
public 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:
localized name

toString
public final 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:
the non-localized name of the Level, for example "INFO".
intValue
public final int intValue()
Get the integer value for this level. This integer value can be used for efficient ordering comparisons between Level objects.

Returns:
the integer value for this level.

parse
public static Level parse(String name)
                   throws IllegalArgumentException
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"

Returns:
parsed value
Throws:
NullPointerException - if the name is null
IllegalArgumentException - if the value is neither one of the known names nor an integer.

equals
public boolean equals(Object ox)
Compare two objects for value equality.

Overrides:
equals in class Object

Parameters:
ox - the reference object with which to compare.
Returns:
true if and only if the two objects have the same level value.
See Also:
Object.hashCode(), Hashtable

hashCode
public int hashCode()
Generate a hashcode.

Overrides:
hashCode in class Object

Returns:
a hashcode based on the level value
See Also:
Object.equals(java.lang.Object), Hashtable

Field Summary
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.

Method Summary
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.
int	intValue() Get the integer value for this level.
static Level	parse(String name) Parse a level name string into a Level.
String	toString() Returns a string representation of the object.

java.util.logging Class Level

Field Summary

Constructor Summary

Method Summary

Field Detail

OFF

SEVERE

WARNING

INFO

CONFIG

FINE

FINER

FINEST

ALL

Constructor Detail

Level

Level

Method Detail

getResourceBundleName

getName

getLocalizedName

toString

intValue

parse

equals

hashCode

java.util.logging
Class Level