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tutorial/cdi-basic004.html at gh-pages · javaee/tutorial · GitHub
This repository was archived by the owner on Jan 28, 2019. It is now read-only.
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<!DOCTYPE html
>
<
html
lang
="
en
"
>
<
head
>
<
meta
charset
="
utf-8
"
/>
<
title
>
About CDI Managed Beans
</
title
>
<
meta
name
="
viewport
"
content
="
width=device-width, initial-scale=1.0
"
>
<
link
href
="
css/style.css
"
rel
="
stylesheet
"
>
<
script
src
="
https://use.fontawesome.com/96c4d89611.js
"
>
</
script
>
</
head
>
<
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
>
</
tr
>
</
table
>
<
hr
/>
<
table
width
="
90%
"
id
="
top-nav
"
cellspacing
="
0
"
cellpadding
="
0
"
>
<
colgroup
>
<
col
width
="
12%
"
/>
<
col
width
="
12%
"
/>
<
col
width
="
*
"
/>
</
colgroup
>
<
tr
>
<
td
align
="
left
"
>
<
a
href
="
cdi-basic003.html
"
>
<
span
class
="
vector-font
"
>
<
i
class
="
fa fa-arrow-circle-left
"
aria-hidden
="
true
"
>
</
i
>
</
span
>
<
span
style
="
position:relative;top:-2px;
"
>
Previous
</
span
>
</
a
>
</
td
>
<
td
align
="
left
"
>
<
a
href
="
cdi-basic005.html
"
>
<
span
class
="
vector-font
"
>
<
i
class
="
fa fa-arrow-circle-right vector-font
"
aria-hidden
="
true
"
>
</
i
>
</
span
>
<
span
style
="
position:relative;top:-2px;
"
>
Next
</
span
>
</
a
>
</
td
>
<
td
align
="
right
"
>
<
a
href
="
toc.html
"
>
<
span
class
="
vector-font
"
>
<
i
class
="
fa fa-list vector-font
"
aria-hidden
="
true
"
>
</
i
>
</
span
>
<
span
style
="
position:relative;top:-2px;
"
>
Contents
</
span
>
</
a
>
</
td
>
</
tr
>
</
table
>
<
div
id
="
preamble
"
>
<
div
class
="
sectionbody
"
>
<
div
class
="
paragraph
"
>
<
p
>
<
a
id
="
GJFZI
"
>
</
a
>
<
a
id
="
about-cdi-managed-beans
"
>
</
a
>
</
p
>
</
div
>
</
div
>
</
div
>
<
div
class
="
sect1
"
>
<
h2
id
="
_about_cdi_managed_beans
"
>
About CDI Managed Beans
</
h2
>
<
div
class
="
sectionbody
"
>
<
div
class
="
paragraph
"
>
<
p
>
A managed bean is implemented by a Java class, which is called its bean
class. A top-level Java class is a managed bean if it is defined to be a
managed bean by any other Java EE technology specification, such as the
JavaServer Faces technology specification, or if it meets all the
following conditions.
</
p
>
</
div
>
<
div
class
="
ulist
"
>
<
ul
>
<
li
>
<
p
>
It is not a nonstatic inner class.
</
p
>
</
li
>
<
li
>
<
p
>
It is a concrete class or is annotated
<
code
>
@Decorator
</
code
>
.
</
p
>
</
li
>
<
li
>
<
p
>
It is not annotated with an EJB component-defining annotation or
declared as an EJB bean class in
<
code
>
ejb-jar.xml
</
code
>
.
</
p
>
</
li
>
<
li
>
<
p
>
It has an appropriate constructor. That is, one of the following is
the case.
</
p
>
<
div
class
="
ulist
"
>
<
ul
>
<
li
>
<
p
>
The class has a constructor with no parameters.
</
p
>
</
li
>
<
li
>
<
p
>
The class declares a constructor annotated
<
code
>
@Inject
</
code
>
.
</
p
>
</
li
>
</
ul
>
</
div
>
</
li
>
</
ul
>
</
div
>
<
div
class
="
paragraph
"
>
<
p
>
No special declaration, such as an annotation, is required to define a
managed bean.
</
p
>
</
div
>
</
div
>
</
div
>
<
hr
/>
<
table
width
="
90%
"
id
="
bottom-nav
"
cellspacing
="
0
"
cellpadding
="
0
"
>
<
colgroup
>
<
col
width
="
12%
"
/>
<
col
width
="
12%
"
/>
<
col
width
="
*
"
/>
</
colgroup
>
<
tr
>
<
td
align
="
left
"
>
<
a
href
="
cdi-basic003.html
"
>
<
span
class
="
vector-font
"
>
<
i
class
="
fa fa-arrow-circle-left
"
aria-hidden
="
true
"
>
</
i
>
</
span
>
<
span
style
="
position:relative;top:-2px;
"
>
Previous
</
span
>
</
a
>
</
td
>
<
td
align
="
left
"
>
<
a
href
="
cdi-basic005.html
"
>
<
span
class
="
vector-font
"
>
<
i
class
="
fa fa-arrow-circle-right vector-font
"
aria-hidden
="
true
"
>
</
i
>
</
span
>
<
span
style
="
position:relative;top:-2px;
"
>
Next
</
span
>
</
a
>
</
td
>
<
td
align
="
right
"
>
<
a
href
="
toc.html
"
>
<
span
class
="
vector-font
"
>
<
i
class
="
fa fa-list vector-font
"
aria-hidden
="
true
"
>
</
i
>
</
span
>
<
span
style
="
position:relative;top:-2px;
"
>
Contents
</
span
>
</
a
>
</
td
>
</
tr
>
</
table
>
<
span
id
="
copyright
"
>
<
a
href
="
img/cpyr.adoc
"
>
<
img
src
="
img/oracle.gif
"
height
="
10px
"
alt
="
Oracle Logo
"
/>
<
span
>
Copyright © 2017, Oracle and/or its affiliates. All rights reserved.
</
span
>
</
a
>
</
span
>
<!--<p align="center" class="beta">Beta Draft (Pre-General Availability)</p> -->
</
body
>
</
html
>
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