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Converted to HTML in WebWorks Publisher 2000. manual wdt 1.5"> <META NAME="LASTUPDATED" CONTENT="09/28/00 13:15:35"> <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="javarray.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="javobj.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="JavaClass"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="5"><B><zrefhead1>JavaClass</zrefhead1></B></FONT><P><A NAME="1198169"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>A JavaScript reference to a Java class.<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="1198162"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext><I>Core object</I></ztabletext></FONT> </TD> <TD VALIGN=TOP><P><A NAME="1198164"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext></ztabletext></FONT> </TD> </TR> <TR> <TD VALIGN=TOP><P><A NAME="1198166"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext><I>Implemented in</I></ztabletext></FONT> </TD> <TD VALIGN=TOP><P><A NAME="1198168"> </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="1198170"> </A><A NAME="Created by"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>Created by</zrefheader></B></FONT><BR><A NAME="1198171"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>A reference to the class name used with the <FONT FACE="courier, couriernew, monospaced size">Packages</FONT> object:</zparagraph></FONT><P><A NAME="1198172"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="2"><zcodeline>Packages.<I>JavaClass</I></zcodeline></FONT><P><A NAME="1198173"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>where <I>JavaClass</I> is the fully-specified name of the object's Java class. The LiveConnect <FONT FACE="courier, couriernew, monospaced size">java</FONT>, <FONT FACE="courier, couriernew, monospaced size">sun</FONT>, and <FONT FACE="courier, couriernew, monospaced size">netscape</FONT> objects provide shortcuts for commonly used Java packages and also create <FONT FACE="courier, couriernew, monospaced size">JavaClass</FONT> objects.</zparagraph></FONT><P><BR><A NAME="1198174"> </A><A NAME="Description"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>Description</zrefheader></B></FONT><BR><A NAME="1198262"> </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 Java package, such as <FONT FACE="courier, couriernew, monospaced size">netscape.javascript.JSObject</FONT>. A <FONT FACE="courier, couriernew, monospaced size">JavaPackage</FONT> object is a reference to a Java package, such as <FONT FACE="courier, couriernew, monospaced size">netscape.javascript</FONT>. In JavaScript, 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="1198379"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>You can pass a <FONT FACE="courier, couriernew, monospaced size">JavaClass</FONT> object to a Java method which requires an argument of type <FONT FACE="courier, couriernew, monospaced size">java.lang.Class</FONT>.</zparagraph></FONT><P><BR><A NAME="1198409"> </A><A NAME="Backward compatibility"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>Backward compatibility</zrefheader></B></FONT><BR><P><A NAME="1198420"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zheadrunin>JavaScript 1.3 and earlier. </zheadrunin></B></FONT><A NAME="1198894"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>You must create a wrapper around an instance of <FONT FACE="courier, couriernew, monospaced size">java.lang.Class</FONT> before you pass it as a parameter to a Java method—<FONT FACE="courier, couriernew, monospaced size">JavaClass</FONT> objects are not automatically converted to instances of <FONT FACE="courier, couriernew, monospaced size">java.lang.Class</FONT>.</zparagraph></FONT><P><BR><A NAME="1198422"> </A><A NAME="Property Summary"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>Property Summary</zrefheader></B></FONT><BR><A NAME="1198285"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>The properties of a <FONT FACE="courier, couriernew, monospaced size">JavaClass</FONT> object are the static fields of the Java class.</zparagraph></FONT><P><BR><A NAME="1198220"> </A><A NAME="Method Summary"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>Method Summary</zrefheader></B></FONT><BR><A NAME="1198221"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>The methods of a <FONT FACE="courier, couriernew, monospaced size">JavaClass</FONT> object are the static methods of the Java class.</zparagraph></FONT><P><BR><A NAME="1198180"> </A><A NAME="Examples"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>Examples</zrefheader></B></FONT><BR><A NAME="1198460"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph><B>Example 1.</B> In the following example, <FONT FACE="courier, couriernew, monospaced size">x</FONT> is a <FONT FACE="courier, couriernew, monospaced size">JavaClass</FONT> object referring to <FONT FACE="courier, couriernew, monospaced size">java.awt.Font</FONT>. Because <FONT FACE="courier, couriernew, monospaced size">BOLD</FONT> is a static field in the <FONT FACE="courier, couriernew, monospaced size">Font</FONT> class, it is also a property of the <FONT FACE="courier, couriernew, monospaced size">JavaClass</FONT> object.</zparagraph></FONT><P><A NAME="1198252"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="2"><zcodeline>x = java.awt.Font<br>myFont = x("helv",x.BOLD,10) // creates a Font object</zcodeline></FONT><P><A NAME="1198351"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>The previous example omits the <FONT FACE="courier, couriernew, monospaced size">Packages</FONT> keyword and uses the <FONT FACE="courier, couriernew, monospaced size">java</FONT> synonym because the <FONT FACE="courier, couriernew, monospaced size">Font</FONT> class is in the <FONT FACE="courier, couriernew, monospaced size">java</FONT> package.</zparagraph></FONT><P><A NAME="1198507"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph><B>Example 2.</B> In the following example, the <FONT FACE="courier, couriernew, monospaced size">JavaClass</FONT> object <FONT FACE="courier, couriernew, monospaced size">java.lang.String</FONT> is passed as an argument to the <FONT FACE="courier, couriernew, monospaced size">newInstance</FONT> method which creates an array:</zparagraph></FONT><P><A NAME="1198467"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="2"><zcodeline>var cars = java.lang.reflect.Array.newInstance(java.lang.String, 15)</zcodeline></FONT><P><BR><A NAME="1198183"> </A><A NAME="See also"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>See also</zrefheader></B></FONT><BR><A NAME="1198196"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph><A HREF="javarray.html#1193137" >JavaArray</A>, <A HREF="javobj.html#1193137" >JavaObject</A>, <A HREF="javpkg.html#1193137" >JavaPackage</A>, <A HREF="packages.html#1193137" >Packages</A></zparagraph></FONT><P> </BLOCKQUOTE></BOOKCONTENT><FOOTERCONTENT> <BLOCKQUOTE> <BR> <b><a href="javarray.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="javobj.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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