Dispose pattern: Difference between revisions

Revision as of 15:59, 30 January 2013

Revision as of 16:42, 6 February 2013

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{{Unreferenced|date=May 2009}}

{{redirect|Dispose||Disposal (disambiguation)}}

{{Refimprove|date=February 2013}}

In [[computer programming]], the '''dispose pattern''' is a [[design pattern (computer science)|design pattern]] which is used to handle resource cleanup in [[runtime environment]]s that use [[automatic garbage collection]]. The fundamental problem that the dispose pattern aims to solve is that, because objects in a garbage-collected environment have [[finalizer]]s rather than [[destructor (computer science)|destructors]], there is no guarantee that an object will be destroyed at any deterministic point in time. The dispose pattern works around this by giving an object a [[method (computer science)|method]] (usually called <code>Dispose</code> or similar) which frees any resources the object is holding onto.

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The [[Java (programming language)|Java]] language introduced a new syntax called <code>try</code>-with-resources in Java version 7 .<ref>Oracle Java tutorial: [http://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html The try-with-resources Statement]</ref>. It can be used on objects that implement the AutoCloseable interface (that defines method close()):

<source lang="java">

try ( OutputStream x = new OutputStream(...) ){