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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>Injecting Beans</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="css/style.css" rel="stylesheet">
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<body>
<table id="doc-title" cellspacing="0" cellpadding="0">
<tr>
<td align="left" valign="top">
<b>Java Platform, Enterprise Edition (Java EE) 8</b><br />
<b>The Java EE Tutorial</b>
<!-- <p class="beta">Beta Draft (Pre-General Availability)</p> -->
</td>
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</table>
<hr />
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<a href="cdi-basic006.html">
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<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p><a id="GJBAN"></a><a id="injecting-beans"></a></p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_injecting_beans">Injecting Beans</h2>
<div class="sectionbody">
<div class="paragraph">
<p>To use the beans you create, you inject them into yet another
bean that can then be used by an application, such as a JavaServer Faces
application. For example, you might create a bean called <code>Printer</code> into
which you would inject one of the <code>Greeting</code> beans:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="prettyprint highlight"><code class="language-oac_no_warn" data-lang="oac_no_warn">import javax.inject.Inject;
public class Printer {
@Inject Greeting greeting;
...
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>This code injects the <code>@Default</code> <code>Greeting</code> implementation into the
bean. The following code injects the <code>@Informal</code> implementation:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="prettyprint highlight"><code class="language-oac_no_warn" data-lang="oac_no_warn">import javax.inject.Inject;
public class Printer {
@Inject @Informal Greeting greeting;
...
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>More is needed for the complete picture of this bean. Its use of scope
needs to be understood. In addition, for a JavaServer Faces application,
the bean needs to be accessible through the EL.</p>
</div>
<div class="paragraph">
<p>Now that you can identify the target of the injection, it is important to
understand what can be injected and in what context. JSF 2.3 provides producers
that enable most important JSF artifacts to be injected. For detailed information,
see the package <a href="https://javaee.github.io/javaee-spec/">javadoc</a> for
<code>javax.faces.annotation</code>.</p>
</div>
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