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<HTML><HEAD> <META NAME="keywords" CONTENT="electronic commerce, ecommerce, ebusiness, e-business, e-commerce, enterprise software, net economy, Netscape, Sun Microsystems, Sun-Netscape Alliance, iPlanet, internet software"> <META NAME="description" CONTENT="The Sun-Netscape Alliance, a strategic alliance formed by America Online and Sun Microsystems, Inc., is delivering iPlanet e-commerce software and enterprise solutions that enable companies to compete successfully in the Net Economy"> <META HTTP-EQUIV="Content-Type" content="text/html; charset=ISO-8859-1"> <META NAME="TEMPLATEBASE" CONTENT="Authored in FrameMaker. Converted to HTML in WebWorks Publisher 2000. manual wdt 1.5"> <META NAME="LASTUPDATED" CONTENT="09/28/00 13:15:36"> <TITLE> Core JavaScript Reference 1.5: </TITLE></HEAD><BODY TEXT="#000000" LINK="#666699" VLINK="#666699" ALINK="#333366" BGCOLOR="#FFFFFF"><MAINCONTENT><NAVIGATIONCONTENT> <TABLE WIDTH="100%" BORDER="0" CELLSPACING="4"> <TR> <TD VALIGN="TOP"> <b><a href="javobj.html"><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Previous</a></FONT> </b><a href="contents.html"><b><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Contents</a></FONT></b> <a href="ix.html"><b><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Index</a></FONT></b> <a href="math.html"><b><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Next</a></FONT></b> </TD> </TR> <TR> <TD VALIGN="TOP" ALIGN="RIGHT" BGCOLOR="#CCCCCC"> <FONT FACE="Arial, Helvetica, sans-serif" COLOR="#000000" SIZE="2"><B> Core JavaScript Reference 1.5</B></FONT> </TD> </TR> <TR> </TABLE> <BR></NAVIGATIONCONTENT><BOOKCONTENT> <blockquote><BR><BR> <BR><BR><P><A NAME="1193137"> </A><A NAME="JavaPackage"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="5"><B><zrefhead1>JavaPackage</zrefhead1></B></FONT><P><A NAME="1193151"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>A JavaScript reference to a Java package.<BR><P><TABLE WIDTH="90%" BORDER="1" CELLPADDING="5" CELLSPACING="0"> <CAPTION></CAPTION><P><FONT FACE=""><B></B></FONT><BR><BR> <TR> <TD VALIGN=TOP><P><A NAME="1193140"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext><I>Core object</I></ztabletext></FONT> </TD> <TD VALIGN=TOP><P><A NAME="1193142"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext></ztabletext></FONT> </TD> </TR> <TR> <TD VALIGN=TOP><P><A NAME="1193144"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext><I>Implemented in</I></ztabletext></FONT> </TD> <TD VALIGN=TOP><P><A NAME="1193146"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext>JavaScript 1.1, NES 2.0</ztabletext></FONT> </TD> </TR></TABLE><P></zparagraph></FONT><P><BR><A NAME="1193152"> </A><A NAME="Created by"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>Created by</zrefheader></B></FONT><BR><A NAME="1193153"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>A reference to the package name used with the <FONT FACE="courier, couriernew, monospaced size">Packages</FONT> keyword:</zparagraph></FONT><P><A NAME="1196676"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="2"><zcodeline>Packages.<I>JavaPackage</I></zcodeline></FONT><P><A NAME="1196829"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>where <I>JavaPackage</I> is the name of the object's Java package. If the package is in the <FONT FACE="courier, couriernew, monospaced size">java</FONT>, <FONT FACE="courier, couriernew, monospaced size">netscape</FONT>, or <FONT FACE="courier, couriernew, monospaced size">sun</FONT> packages, the <FONT FACE="courier, couriernew, monospaced size">Packages</FONT> keyword is optional.</zparagraph></FONT><P><BR><A NAME="1193162"> </A><A NAME="Description"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>Description</zrefheader></B></FONT><BR><A NAME="1197167"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>In Java, a package is a collection of Java classes or other Java packages. For example, the <FONT FACE="courier, couriernew, monospaced size">netscape</FONT> package contains the package <FONT FACE="courier, couriernew, monospaced size">netscape.javascript</FONT>; the <FONT FACE="courier, couriernew, monospaced size">netscape.javascript</FONT> package contains the classes <FONT FACE="courier, couriernew, monospaced size">JSObject</FONT> and <FONT FACE="courier, couriernew, monospaced size">JSException.</FONT></zparagraph></FONT><P><A NAME="1198245"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>In JavaScript, a <FONT FACE="courier, couriernew, monospaced size">JavaPackage</FONT> is a reference to a Java package. For example, a reference to <FONT FACE="courier, couriernew, monospaced size">netscape</FONT> is a <FONT FACE="courier, couriernew, monospaced size">JavaPackage</FONT>. <FONT FACE="courier, couriernew, monospaced size">netscape.javascript</FONT> is both a <FONT FACE="courier, couriernew, monospaced size">JavaPackage</FONT> and a property of the <FONT FACE="courier, couriernew, monospaced size">netscape</FONT> <FONT FACE="courier, couriernew, monospaced size">JavaPackage</FONT>.</zparagraph></FONT><P><A NAME="1198297"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>A <FONT FACE="courier, couriernew, monospaced size">JavaClass</FONT> object is a reference to one of the classes in a package, such as <FONT FACE="courier, couriernew, monospaced size">netscape.javascript.JSObject</FONT>. The <FONT FACE="courier, couriernew, monospaced size">JavaPackage</FONT> and <FONT FACE="courier, couriernew, monospaced size">JavaClass</FONT> hierarchy reflect the Java package and class hierarchy.</zparagraph></FONT><P><A NAME="1198523"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>Although the packages and classes contained in a <FONT FACE="courier, couriernew, monospaced size">JavaPackage</FONT> are its properties, you cannot use a <FONT FACE="courier, couriernew, monospaced size">for...in</FONT> statement to enumerate them as you can enumerate the properties of other objects.</zparagraph></FONT><P><BR><A NAME="1197132"> </A><A NAME="Property Summary"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>Property Summary</zrefheader></B></FONT><BR><A NAME="1197133"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>The properties of a <FONT FACE="courier, couriernew, monospaced size">JavaPackage</FONT> are the <FONT FACE="courier, couriernew, monospaced size">JavaClass</FONT> objects and any other <FONT FACE="courier, couriernew, monospaced size">JavaPackage</FONT> objects it contains.</zparagraph></FONT><P><BR><A NAME="1193209"> </A><A NAME="Examples"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>Examples</zrefheader></B></FONT><BR><A NAME="1194739"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>Suppose the Redwood corporation uses the Java <FONT FACE="courier, couriernew, monospaced size">redwood</FONT> package to contain various Java classes that it implements. The following code creates the <FONT FACE="courier, couriernew, monospaced size">JavaPackage</FONT> <FONT FACE="courier, couriernew, monospaced size">red</FONT>:</zparagraph></FONT><P><A NAME="1198136"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="2"><zcodeline>var red = Packages.redwood</zcodeline></FONT><P><BR><A NAME="1198334"> </A><A NAME="See also"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>See also</zrefheader></B></FONT><BR><A NAME="1198347"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph><A HREF="javarray.html#1193137" >JavaArray</A>, <A HREF="javclass.html#1193137" >JavaClass</A>, <A HREF="javobj.html#1193137" >JavaObject</A>, <A HREF="packages.html#1193137" >Packages</A></zparagraph></FONT><P> </BLOCKQUOTE></BOOKCONTENT><FOOTERCONTENT> <BLOCKQUOTE> <BR> <b><a href="javobj.html"><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Previous</a></FONT> </b><a href="contents.html"><b><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Contents</a></FONT></b> <a href="ix.html"><b><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Index</a></FONT></b> <a href="math.html"><b><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Next</a></FONT></b> <HR NOSHADE SIZE="1"> <font face="Arial, Helvetica, sans-serif" SIZE="1">Copyright © 2000 <a href="http://www.netscape.com">Netscape Communications Corp.</a> All rights reserved.</FONT> </BLOCKQUOTE> <FONT FACE="Arial, Helvetica, sans-serif" SIZE="1"> <P ALIGN="RIGHT">Last Updated <B>September 28, 2000</B> </FONT> <BR></FOOTERCONTENT></MAINCONTENT></BODY></HTML>?? 快捷鍵說明
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