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<TITLE>Logging an Exception
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    <B><A HREF="../java.util.logging/pkg.html">java.util.logging</A></B><font color="#666666" SIZE="-2">
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  <h3>
    e388.  
    Logging an Exception</h3>

The logger method <code>log()</code> can be used to log an exception.  Also, the
convenience method <code>Logger.throwing()</code> can be used by a method about to
throw an exception.


<pre>
    package <font color="#0066ff"><i>com.mycompany</i></font>;
    class <font color="#0066ff"><i>MyClass</i></font> {
        public void <font color="#0066ff"><i>myMethod</i></font>() {
            Logger logger = Logger.getLogger(<font color="#0066ff"><i>"com.mycompany.MyClass"</i></font>);
    
            // This method should be used when an exception is encounted
            try {
                // Test with an exception
                throw new IOException();
            } catch (Throwable e){
                // Log the exception
                logger.log(Level.SEVERE, "Uncaught exception", e);
            }
    
            // When a method is throwing an exception, this method should be used
            Exception ex = new IllegalStateException();
            logger.throwing(this.getClass().getName(), <font color="#0066ff"><i>"myMethod"</i></font>, ex);
        }
    }
</pre>
Here is a sample of the output generated by the example:

<pre>
    Jan 11, 2002 5:16:49 PM com.mycompany.MyClass myMethod
    SEVERE: Uncaught exception
    java.io.IOException
            at com.mycompany.MyClass.myMethod(com.mycompany.MyClass.java:32)
            at com.mycompany.MyClass.main(com.mycompany.MyClass.java:18)
    Jan 11, 2002 5:16:50 PM com.mycompany.MyClass myMethod
    FINER: THROW
    java.lang.IllegalStateException
            at com.mycompany.MyClass.myMethod(com.mycompany.MyClass.java:25)
            at com.mycompany.MyClass.main(com.mycompany.MyClass.java:18)
</pre>
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            &nbsp;Related Examples
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e385. <a class="eglink" href="BasicLogging.html?l=rel">
    The Quintessential Logging Program
</a>
<br>

e386. <a class="eglink" href="IsLog.html?l=rel">
    Determining If a Message Will Be Logged
</a>
<br>

e387. <a class="eglink" href="LogMethod.html?l=rel">
    Logging a Method Call
</a>
<br>

e389. <a class="eglink" href="Minimize.html?l=rel">
    Minimizing the Impact of Logging Code
</a>
<br>

e390. <a class="eglink" href="NoParent.html?l=rel">
    Preventing a Logger from Forwarding Log Records to its Parent
</a>
<br>

e391. <a class="eglink" href="LogFile.html?l=rel">
    Writing Log Records to a Log File
</a>
<br>

e392. <a class="eglink" href="LogConsole.html?l=rel">
    Writing Log Records to Standard Error
</a>
<br>

e393. <a class="eglink" href="LogMemory.html?l=rel">
    Writing Log Records Only After a Condition Occurs
</a>
<br>

e394. <a class="eglink" href="SetFilter.html?l=rel">
    Setting a Filter on a Logger Handler
</a>
<br>


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        See also: 
<a class="eglink" href="/egs/java.util.logging/pkg.html?l=rel#Configuration">
    Configuration
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util.logging/pkg.html?l=rel#File%20Size">
    File Size
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util.logging/pkg.html?l=rel#Formatters">
    Formatters
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.util.logging/pkg.html?l=rel#Levels">
    Levels
</a>&nbsp;&nbsp;

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