wiki-export/wiki-content/DevFaqWeakListenerWhen.xml

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  <page>
    <title>DevFaqWeakListenerWhen</title>
    <id>14372</id>
    <revision>
      <id>32810</id>
      <timestamp>2010-01-24T06:12:14Z</timestamp>
      <contributor>
        <username>Tboudreau</username>
        <id>108</id>
      </contributor>
      <comment>Created page with '__NOTOC__ ==When should I use a WeakListener==  You should use a [[DevFaqWeakListener| WeakListener]] any time you are adding a listener to an object, but there is no code - and …'</comment>
      <text xml:space="preserve">__NOTOC__
==When should I use a WeakListener==

You should use a [[DevFaqWeakListener| WeakListener]] any time you are adding a listener to an object, but there is no code - and possibly no opportunity - to explicitly remove it.

If the thing you are listening to does have some kind of observable life-cycle, it is preferable to explicitly add and detach listeners.

But in the case that you are adding a listener which is never explicitly removed, it is good form to use &lt;code&gt;[http://bits.netbeans.org/dev/javadoc/org-openide-util/org/openide/util/WeakListeners.html WeakListeners]&lt;/code&gt;</text>
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