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:
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.
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
| |
Level ALL
ALL indicates that all messages should be logged.
This level is initialized to Integer.MIN_VALUE.
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.
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.
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.
Level FINEST
FINEST indicates a highly detailed tracing message.
This level is initialized to 300.
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.
Level OFF
OFF is a special level that can be used to turn off logging.
This level is initialized to Integer.MAX_VALUE.
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.
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.
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 (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 |
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. |
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 |
String getName ()
Return the non-localized string name of the Level.
| Returns | |
|---|---|
String |
non-localized name |
String getResourceBundleName ()
Return the level's localization resource bundle name, or null if no localization bundle is defined.
| Returns | |
|---|---|
String |
localization resource bundle name |
int hashCode ()
Generate a hashcode.
| Returns | |
|---|---|
int |
a hashcode based on the level value |
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. |
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:
| 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. |
String toString ()
Returns a string representation of this Level.
| Returns | |
|---|---|
String |
the non-localized name of the Level, for example "INFO". |
Developers