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. 

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. 

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. 

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. 

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. 

 protected Level(String name,
    int value) 
{
        this(name, value, null);
}

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

 protected Level(String name,
    int value,
    String resourceBundleName) 
{
        if (name == null) {
            throw new NullPointerException();
        }
        this.name = name;
        this.value = value;
        this.resourceBundleName = resourceBundleName;
        synchronized (Level.class) {
            known.add(this);
        }
}

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

 public boolean equals(Object ox) 
{
        try {
            Level lx = (Level)ox;
            return (lx.value == this.value);
        } catch (Exception ex) {
            return false;
        }
}

Compare two objects for value equality.

 public String getLocalizedName() 
{
        try {
            ResourceBundle rb = ResourceBundle.getBundle(resourceBundleName);
            return rb.getString(name);
        } catch (Exception ex) {
            return name;
        }
}

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.

 public String getName() 
{
        return name;
}

Return the non-localized string name of the Level.

 public String getResourceBundleName() 
{
        return resourceBundleName;
}

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

 public int hashCode() 
{
        return this.value;
}

Generate a hashcode.

 public final int intValue() 
{
        return value;
}

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

 public static synchronized Level parse(String name) throws IllegalArgumentException 
{
        // Check that name is not null.
        name.length();
        // Look for a known Level with the given non-localized name.
        for (int i = 0; i <  known.size(); i++) {
            Level l = known.get(i);
            if (name.equals(l.name)) {
                return l;
            }
        }
        // Now, check if the given name is an integer.  If so,
        // first look for a Level with the given value and then
        // if necessary create one.
        try {
            int x = Integer.parseInt(name);
            for (int i = 0; i <  known.size(); i++) {
                Level l = known.get(i);
                if (l.value == x) {
                    return l;
                }
            }
            // Create a new Level.
            return new Level(name, x);
        } catch (NumberFormatException ex) {
            // Not an integer.
            // Drop through.
        }
        // Finally, look for a known level with the given localized name,
        // in the current default locale.
        // This is relatively expensive, but not excessively so.
        for (int i = 0; i <  known.size(); i++) {
            Level l =  known.get(i);
            if (name.equals(l.getLocalizedName())) {
                return l;
            }
        }
        // OK, we've tried everything and failed
        throw new IllegalArgumentException("Bad level \"" + 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"

 public final String toString() 
{
        return name;
}

Returns a string representation of this Level.