- java.lang.Object
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- java.util.logging.Level
 
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- 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)
 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
 
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Field SummaryFields Modifier and Type Field Description static LevelALLALL indicates that all messages should be logged.static LevelCONFIGCONFIG is a message level for static configuration messages.static LevelFINEFINE is a message level providing tracing information.static LevelFINERFINER indicates a fairly detailed tracing message.static LevelFINESTFINEST indicates a highly detailed tracing message.static LevelINFOINFO is a message level for informational messages.static LevelOFFOFF is a special level that can be used to turn off logging.static LevelSEVERESEVERE is a message level indicating a serious failure.static LevelWARNINGWARNING is a message level indicating a potential problem.
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Constructor SummaryConstructors Modifier Constructor Description protectedLevel(String name, int value)Create a named Level with a given integer value.protectedLevel(String name, int value, String resourceBundleName)Create a named Level with a given integer value and a given localization resource name.
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Method SummaryAll Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description booleanequals(Object ox)Compare two objects for value equality.StringgetLocalizedName()Return the localized string name of the Level, for the current default locale.StringgetName()Return the non-localized string name of the Level.StringgetResourceBundleName()Return the level's localization resource bundle name, or null if no localization bundle is defined.inthashCode()Generate a hashcode.intintValue()Get the integer value for this level.static Levelparse(String name)Parse a level name string into a Level.StringtoString()Returns a string representation of this Level.
 
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Field Detail- 
OFFpublic static final Level OFF OFF is a special level that can be used to turn off logging. This level is initialized toInteger.MAX_VALUE.
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SEVEREpublic 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.
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WARNINGpublic 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.
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INFOpublic 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 administrators. This level is initialized to 800.
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CONFIGpublic 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.
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FINEpublic 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.
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FINERpublic 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 to400.
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FINESTpublic static final Level FINEST FINEST indicates a highly detailed tracing message. This level is initialized to300.
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ALLpublic static final Level ALL ALL indicates that all messages should be logged. This level is initialized toInteger.MIN_VALUE.
 
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Constructor Detail- 
Levelprotected 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.
- Throws:
- NullPointerException- if the name is null
 
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Levelprotected 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. If the resourceBundleName is null or an empty string, it is ignored.
- Throws:
- NullPointerException- if the name is null
 
 
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Method Detail- 
getResourceBundleNamepublic String getResourceBundleName() Return the level's localization resource bundle name, or null if no localization bundle is defined.- Returns:
- localization resource bundle name
 
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getNamepublic String getName() Return the non-localized string name of the Level.- Returns:
- non-localized name
 
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getLocalizedNamepublic 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
 
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toStringpublic final String toString() Returns a string representation of this Level.
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intValuepublic 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.
 
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parsepublic 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"
 - Parameters:
- name- string to be parsed
- Returns:
- 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_VALUEand- 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.
 
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equalspublic boolean equals(Object ox) Compare two objects for value equality.- Overrides:
- equalsin 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(),- HashMap
 
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hashCodepublic int hashCode() Generate a hashcode.- Overrides:
- hashCodein class- Object
- Returns:
- a hashcode based on the level value
- See Also:
- Object.equals(java.lang.Object),- System.identityHashCode(java.lang.Object)
 
 
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