constructors.html
来自「java类库详细讲解」· HTML 代码 · 共 129 行
HTML
129 行
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Getting a Constructor of a Class Object
(Java Developers Almanac Example)
</TITLE>
<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
<META CONTENT="Addison-Wesley/Patrick Chan" NAME="OWNER">
<META CONTENT="3/20/02" NAME="revision">
<STYLE TYPE="text/css">
<!-- BODY CODE {font-family: Courier, Monospace; font-size: 11pt} TABLE, BODY {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10pt} PRE {font-family: Courier, Monospace; font-size: 10pt} H3 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11pt} A.eglink {text-decoration: none} A:hover.eglink {text-decoration: underline} -->
</STYLE>
</HEAD>
<BODY>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD rowspan="3"><A HREF="/?l=ex"><IMG BORDER="0" ALIGN="BOTTOM" HSPACE="10" SRC="/egs/almanac14a.jpg"></A></TD><TD VALIGN="top"><font face="Times" size="6"><b>The Java Developers Almanac 1.4</b></font>
<br>
Order this book from <a href="/cgi-bin/scripts/redirect.pl?l=ex&url=http://www.amazon.com/exec/obidos/ASIN/0201752808/xeo">Amazon</a>.
</TD>
</TR>
<TR>
<TD align="right" valign="bottom">
<FORM method="get" action="/cgi-bin/search/find.pl">
<INPUT size="25" name="words" type="text"><INPUT value="Search" type="submit">
</FORM>
</TD>
</TR>
</TABLE>
<HR color="#6666cc">
<DIV ALIGN="LEFT">
<A HREF="/">Home</A>
>
<A HREF="../index.html">List of Packages</A>
>
<B><A HREF="../java.lang.reflect/pkg.html">java.lang.reflect</A></B><font color="#666666" SIZE="-2">
[17 examples]
</font>
>
<B><A HREF="../java.lang.reflect/pkg.html#Constructors">Constructors</A></B><font color="#666666" SIZE="-2">
[2 examples]
</font>
</DIV><P>
<h3>
e116.
Getting a Constructor of a Class Object</h3>
There are two ways of obtaining a <code>Constructor</code> object from a
<code>Class</code> object.
<pre>
// By obtaining a list of all Constructors object.
Constructor[] cons = <font color="#0066ff"><i>cls</i></font>.getDeclaredConstructors();
for (int i=0; i<cons.length; i++) {
Class[] paramTypes = cons[i].getParameterTypes();
<font color="#0066ff"><i>process</i></font>(cons[i]);
}
// By obtaining a particular Constructor object.
// This example retrieves java.awt.Point(int, int).
try {
Constructor con = <font color="#0066ff"><i>java.awt.Point.class</i></font>.getConstructor(new Class[]{<font color="#0066ff"><i>int.class, int.class</i></font>});
<font color="#0066ff"><i>process</i></font>(con);
} catch (NoSuchMethodException e) {
}
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td bgcolor="#6666cc" align="center"><font color="#ffffff">
Related Examples
</font></td>
</tr>
</table>
e117. <a class="eglink" href="UseConstructor.html?l=rel">
Creating an Object Using a Constructor Object
</a>
<br>
<table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td align="left">
<br>
See also:
<a class="eglink" href="/egs/java.lang.reflect/pkg.html?l=rel#Arrays">
Arrays
</a>
<a class="eglink" href="/egs/java.lang.reflect/pkg.html?l=rel#Fields">
Fields
</a>
<a class="eglink" href="/egs/java.lang.reflect/pkg.html?l=rel#Methods">
Methods
</a>
<a class="eglink" href="/egs/java.lang.reflect/pkg.html?l=rel#Modifiers">
Modifiers
</a>
</td>
</tr>
</table>
<br>
<br>
<FONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="0">
© 2002 Addison-Wesley.
</FONT>
</BODY>
</HTML>
⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?