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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Fri Sep 27 14:47:30 CDT 2002 --><TITLE>Mobile Information Device Profile 2.0: Class AlertType</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/AlertType.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><strong>MIDP 2.0</strong></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../javax/microedition/lcdui/Alert.html"><B>PREV CLASS</B></A> <A HREF="../../../javax/microedition/lcdui/Canvas.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="AlertType.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">javax.microedition.lcdui</FONT><BR>Class AlertType</H2><PRE>java.lang.Object | +--<B>javax.microedition.lcdui.AlertType</B></PRE><HR><DL><DT>public class <B>AlertType</B><DT>extends Object</DL><P>The <code>AlertType</code> provides an indication of the nature of alerts. <code>Alerts</code> are used by an application to present various kinds of information to the user. An <code>AlertType</code> may be used to directly signal the user without changing the current <code>Displayable</code>. The <code>playSound</code> method can be used to spontaneously generate a sound to alert the user. For example, a game using a <code>Canvas</code> can use <code>playSound</code> to indicate success or progress. The predefined types are <CODE>INFO</CODE>, <CODE>WARNING</CODE>, <CODE>ERROR</CODE>, <CODE>ALARM</CODE>, and <CODE>CONFIRMATION</CODE>. <p><P><DL><DT><B>Since: </B><DD>MIDP 1.0</DD><DT><B>See Also: </B><DD><A HREF="../../../javax/microedition/lcdui/Alert.html"><CODE>Alert</CODE></A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Field Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../javax/microedition/lcdui/AlertType.html">AlertType</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/AlertType.html#ALARM">ALARM</A></B></CODE><BR> An <code>ALARM</code> <code>AlertType</code> is a hint to alert the user to an event for which the user has previously requested to be notified.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../javax/microedition/lcdui/AlertType.html">AlertType</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/AlertType.html#CONFIRMATION">CONFIRMATION</A></B></CODE><BR> A <code>CONFIRMATION</code> <code>AlertType</code> is a hint to confirm user actions.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../javax/microedition/lcdui/AlertType.html">AlertType</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/AlertType.html#ERROR">ERROR</A></B></CODE><BR> An <code>ERROR</code> <code>AlertType</code> is a hint to alert the user to an erroneous operation.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../javax/microedition/lcdui/AlertType.html">AlertType</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/AlertType.html#INFO">INFO</A></B></CODE><BR> An <code>INFO</code> <code>AlertType</code> typically provides non-threatening information to the user.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../javax/microedition/lcdui/AlertType.html">AlertType</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/AlertType.html#WARNING">WARNING</A></B></CODE><BR> A <code>WARNING</code> <code>AlertType</code> is a hint to warn the user of a potentially dangerous operation.</TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected </CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/AlertType.html#AlertType()">AlertType</A></B>()</CODE><BR> Protected constructor for subclasses.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD>⌨️ 快捷键说明
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