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Summary: Fields | Protected Ctors | Methods | Inherited Methods

# 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`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Fields

### ALL

    public static final Level ALL

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

### 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`.

### 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 administrators. This level is initialized to `800`.

### 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`.

## Protected constructors

### 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` | `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

    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` | `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

    public 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

    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
`String` | localized name

### getName

    public String getName ()

Return the non-localized string name of the Level.

Returns
`String` | non-localized name

### getResourceBundleName

    public 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

    public int hashCode ()

Generate a hashcode.

Returns
`int` | a hashcode based on the level value

### 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
`int` | the integer value for this level.

### parse

    public static 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

    public final String toString ()

Returns a string representation of this Level.

Returns
`String` | the non-localized name of the Level, for example "INFO".

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