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1 2 3 4 5 6 7 8 9 10 11 12 13 | <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 4. Autoboxing and Unboxing</title><link rel="stylesheet" type="text/css" href="aspectj-docs.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><link rel="home" href="index.html" title="The AspectJTM 5 Development Kit Developer's Notebook"><link rel="up" href="index.html" title="The AspectJTM 5 Development Kit Developer's Notebook"><link rel="prev" href="generics-inAspectJ5.html" title="Generics in AspectJ 5"><link rel="next" href="autoboxing-in-aspectj5.html" title="Autoboxing and Join Point matching in AspectJ 5"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 4. Autoboxing and Unboxing</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="generics-inAspectJ5.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="autoboxing-in-aspectj5.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="autoboxing"></a>Chapter 4. Autoboxing and Unboxing</h1></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl class="toc"><dt><span class="sect1"><a href="autoboxing.html#boxing-inJava5">Autoboxing and Unboxing in Java 5</a></span></dt><dt><span class="sect1"><a href="autoboxing-in-aspectj5.html">Autoboxing and Join Point matching in AspectJ 5</a></span></dt><dt><span class="sect1"><a href="autoboxing-and-method-dispatch.html">Inter-type method declarations and method dispatch</a></span></dt></dl></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="boxing-inJava5"></a>Autoboxing and Unboxing in Java 5</h2></div></div></div><p>
Java 5 (and hence AspectJ 1.5) supports automatic conversion of
primitive types (int, float, double etc.) to their object equivalents
(Integer, Float, Double,...) in assignments and method and constructor
invocations. This conversion is know as autoboxing.
</p><p>Java 5 also supports automatic unboxing, where wrapper types
are automatically converted into their primitive equivalents if
needed for assignments or method or constructor invocations.</p><p>For example:</p><pre class="programlisting">
int i = 0;
i = new Integer(5); // auto-unboxing
Integer i2 = 5; // autoboxing
</pre></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="generics-inAspectJ5.html">Prev</a> </td><td width="20%" align="center"> </td><td width="40%" align="right"> <a accesskey="n" href="autoboxing-in-aspectj5.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Generics in AspectJ 5 </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Autoboxing and Join Point matching in AspectJ 5</td></tr></table></div></body></html>
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