📄 runtime.html
字号:
<!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 Wed Sep 24 14:57:47 PDT 2003 -->
<TITLE>
MID Profile: Class Runtime
</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/Runtime.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>MID Profile</strong></EM>
</TD>
</TR>
<TR>
<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
<A HREF="../../java/lang/Object.html"><B>PREV CLASS</B></A>
<A HREF="../../java/lang/Short.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="Runtime.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD>
</TR>
<TR>
<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
SUMMARY: INNER | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD>
<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD>
</TR>
</TABLE>
<!-- =========== END OF NAVBAR =========== -->
<HR>
<!-- ======== START OF CLASS DATA ======== -->
<H2>
<FONT SIZE="-1">
java.lang</FONT>
<BR>
Class Runtime</H2>
<PRE>
<A HREF="../../java/lang/Object.html">java.lang.Object</A>
|
+--<B>java.lang.Runtime</B>
</PRE>
<HR>
<DL>
<DT>public class <B>Runtime</B><DT>extends <A HREF="../../java/lang/Object.html">Object</A></DL>
<P>
Every Java application has a single instance of class <code>Runtime</code> that allows the application to interface with the environment in which the application is running. The current runtime can be obtained from the <code>getRuntime</code> method. <p> An application cannot create its own instance of this class.
<P>
<DL>
<DT><B>Since: </B><DD>JDK1.0</DD>
<DT><B>See Also: </B><DD><A HREF="../../java/lang/Runtime.html#getRuntime()"><CODE>getRuntime()</CODE></A></DL>
<HR>
<P>
<!-- ======== INNER CLASS SUMMARY ======== -->
<!-- =========== FIELD SUMMARY =========== -->
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<!-- ========== 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> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Runtime.html#exit(int)">exit</A></B>(int status)</CODE>
<BR>
Terminates the currently running Java application.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Runtime.html#freeMemory()">freeMemory</A></B>()</CODE>
<BR>
Returns the amount of free memory in the system.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Runtime.html#gc()">gc</A></B>()</CODE>
<BR>
Runs the garbage collector.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../java/lang/Runtime.html">Runtime</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Runtime.html#getRuntime()">getRuntime</A></B>()</CODE>
<BR>
Returns the runtime object associated with the current Java application.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/lang/Runtime.html#totalMemory()">totalMemory</A></B>()</CODE>
<BR>
Returns the total amount of memory in the Java Virtual Machine.</TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from class java.lang.<A HREF="../../java/lang/Object.html">Object</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../java/lang/Object.html#equals(java.lang.Object)">equals</A>, <A HREF="../../java/lang/Object.html#getClass()">getClass</A>, <A HREF="../../java/lang/Object.html#hashCode()">hashCode</A>, <A HREF="../../java/lang/Object.html#notify()">notify</A>, <A HREF="../../java/lang/Object.html#notifyAll()">notifyAll</A>, <A HREF="../../java/lang/Object.html#toString()">toString</A>, <A HREF="../../java/lang/Object.html#wait()">wait</A>, <A HREF="../../java/lang/Object.html#wait(long)">wait</A>, <A HREF="../../java/lang/Object.html#wait(long, int)">wait</A></CODE></TD>
</TR>
</TABLE>
<P>
<!-- ============ FIELD DETAIL =========== -->
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Method Detail</B></FONT></TD>
</TR>
</TABLE>
<A NAME="getRuntime()"><!-- --></A><H3>
getRuntime</H3>
<PRE>
public static <A HREF="../../java/lang/Runtime.html">Runtime</A> <B>getRuntime</B>()</PRE>
<DL>
<DD>Returns the runtime object associated with the current Java application. Most of the methods of class <code>Runtime</code> are instance methods and must be invoked with respect to the current runtime object.<DD><DL>
<DT><B>Returns:</B><DD>the <code>Runtime</code> object associated with the current Java application.</DL>
</DD>
</DL>
<HR>
<A NAME="exit(int)"><!-- --></A><H3>
exit</H3>
<PRE>
public void <B>exit</B>(int status)</PRE>
<DL>
<DD>Terminates the currently running Java application. This method never returns normally. <p> The argument serves as a status code; by convention, a nonzero status code indicates abnormal termination.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>status</CODE> - exit status.<DT><B>Since: </B><DD>JDK1.0</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="freeMemory()"><!-- --></A><H3>
freeMemory</H3>
<PRE>
public long <B>freeMemory</B>()</PRE>
<DL>
<DD>Returns the amount of free memory in the system. Calling the <code>gc</code> method may result in increasing the value returned by <code>freeMemory.</code><DD><DL>
<DT><B>Returns:</B><DD>an approximation to the total amount of memory currently available for future allocated objects, measured in bytes.</DL>
</DD>
</DL>
<HR>
<A NAME="totalMemory()"><!-- --></A><H3>
totalMemory</H3>
<PRE>
public long <B>totalMemory</B>()</PRE>
<DL>
<DD>Returns the total amount of memory in the Java Virtual Machine. The value returned by this method may vary over time, depending on the host environment. <p> Note that the amount of memory required to hold an object of any given type may be implementation-dependent.<DD><DL>
<DT><B>Returns:</B><DD>the total amount of memory currently available for current and future objects, measured in bytes.</DL>
</DD>
</DL>
<HR>
<A NAME="gc()"><!-- --></A><H3>
gc</H3>
<PRE>
public void <B>gc</B>()</PRE>
<DL>
<DD>Runs the garbage collector. Calling this method suggests that the Java Virtual Machine expend effort toward recycling unused objects in order to make the memory they currently occupy available for quick reuse. When control returns from the method call, the Java Virtual Machine has made its best effort to recycle all discarded objects. <p> The name <code>gc</code> stands for "garbage collector". The Java Virtual Machine performs this recycling process automatically as needed, in a separate thread, even if the <code>gc</code> method is not invoked explicitly. <p> The method <A HREF="../../java/lang/System.html#gc()"><CODE>System.gc()</CODE></A> is hte conventional and convenient means of invoking this method.</DL>
<!-- ========= END OF CLASS DATA ========= -->
<HR>
<!-- ========== START OF NAVBAR ========== -->
<A NAME="navbar_bottom"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0">
<TR>
<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1">
<A NAME="navbar_bottom_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/Runtime.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>MID Profile</strong></EM>
</TD>
</TR>
<TR>
<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
<A HREF="../../java/lang/Object.html"><B>PREV CLASS</B></A>
<A HREF="../../java/lang/Short.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="Runtime.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD>
</TR>
<TR>
<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
SUMMARY: INNER | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD>
<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD>
</TR>
</TABLE>
<!-- =========== END OF NAVBAR =========== -->
<HR>
<font size="-1"><a href="mailto:midp-feedback@risc.sps.mot.com">Submit a comment or suggestion</a> Version 2.0 of MID Profile Specification<br>Java is a trademark or registered trademark of Sun Microsystems, Inc. in the US and other countries. Copyright (c) 1993-2002 Sun Microsystems, Inc. 901 San Antonio Road,Palo Alto, California, 94303, U.S.A. All Rights Reserved.</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
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -