getpkg.html

来自「java类库详细讲解」· HTML 代码 · 共 185 行

HTML

185 行

<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Getting the Package of a Class
(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>
    &gt;
    <A HREF="../index.html">List of Packages</A>
    &gt;
    <B><A HREF="../java.lang/pkg.html">java.lang</A></B><font color="#666666" SIZE="-2">
        &nbsp;[58 examples]
        </font>
        &gt;
        <B><A HREF="../java.lang/pkg.html#Classes">Classes</A></B><font color="#666666" SIZE="-2">
            &nbsp;[11 examples]
            </font>
</DIV><P>
  <h3>
    e66.  
    Getting the Package of a Class</h3>



<pre>
    Class cls = <font color="#0066ff"><i>java.lang.String.class</i></font>;
    Package pkg = cls.getPackage();
    String name = pkg.getName();              // java.lang
    
    // getPackage() returns null for a class in the unnamed package
    cls = <font color="#0066ff"><i>MyClass.class</i></font>;
    pkg = cls.getPackage();                   // null
    
    // getPackage() returns null for a primitive type or array
    pkg = <font color="#0066ff"><i>int.class</i></font>.getPackage();    // null
    pkg = <font color="#0066ff"><i>int[].class</i></font>.getPackage();  // null
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td bgcolor="#6666cc" align="center"><font color="#ffffff">
            &nbsp;Related Examples
        </font></td>
</tr>
</table>


e59. <a class="eglink" href="GetClass.html?l=rel">
    Getting a Class Object
</a>
<br>

e60. <a class="eglink" href="GetClassName.html?l=rel">
    Getting the Name of a Class Object
</a>
<br>

e61. <a class="eglink" href="IsClass.html?l=rel">
    Determining If a Class Object Represents a Class or Interface
</a>
<br>

e62. <a class="eglink" href="SuperClass.html?l=rel">
    Getting the Superclass of an Object
</a>
<br>

e63. <a class="eglink" href="SuperClass2.html?l=rel">
    Getting the Superclass of a Class Object
</a>
<br>

e64. <a class="eglink" href="GetImplements2.html?l=rel">
    Listing the Interfaces That a Class Implements
</a>
<br>

e65. <a class="eglink" href="GetImplements.html?l=rel">
    Listing the Interfaces That an Interface Extends
</a>
<br>

e67. <a class="eglink" href="ClassOrigin.html?l=rel">
    Determining from Where a Class Was Loaded
</a>
<br>

e68. <a class="eglink" href="LoadClass.html?l=rel">
    Loading a Class That Is Not on the Classpath
</a>
<br>

e69. <a class="eglink" href="ReloadClass.html?l=rel">
    Dynamically Reloading a Modified Class
</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/pkg.html?l=rel#Arrays">
    Arrays
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Assertions">
    Assertions
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Commands">
    Commands
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Numbers">
    Numbers
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Objects">
    Objects
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Strings">
    Strings
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#System%20Properties">
    System Properties
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Threads">
    Threads
</a>&nbsp;&nbsp;

</td>
</tr>
</table>

<br>

<br>
<FONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="0">
&copy; 2002 Addison-Wesley.
</FONT>
</BODY>
</HTML>

getpkg.html - 源码说明

本页面展示了「java类库详细讲解」中的 getpkg.html 源码文件，采用 HTML 编程语言编写，共 185 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

虫虫下载站收录了大量与java相关的技术资源，包括源代码、技术文档、电路图等，是电子工程师和嵌入式开发者的专业学习平台。

⌨️ 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?