Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

ÄÚ´æ¼àÊÓ Java Ô´´úÂë

/*
 * @(#)MemoryMonitor.java 1.3 05/11/17
 *
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *
 * -Redistribution in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operati


Ïà¹ØÎĵµ£º

JavaÄÚ´æ¹ÜÀí£¨Ò»¡¢ÄÚ´æ·ÖÅ䣩

¹ØÓÚJavaÄÚ´æ·ÖÅ䣬ºÜ¶àÎÊÌⶼģģºýºý£¬²»ÄÜÈ«Ãæ¹áͨÀí½â¡£½ñ²éÔÄ×ÊÁÏ£¬ÓûÇóÉîÈëÍÚ¾ò£¬³¹µ×ÀíÇåjavaÄÚ´æ·ÖÅäÂöÂ磬ֻÒòˮƽÓÐÏÞ£¬Ã»´ïµ½Ô¤ÆÚЧ¹û£¬½öÒÔ´ËÎĶÔËùÑо¿µ½Ö®´¦×÷ÒԼǼ£¬ÎªÒÔºóѧϰÌṩ²Î¿¼£¬±ÜÃâÖØÍ·ÔÙÀ´¡£
 
Ò»¡¢JavaÄÚ´æ·ÖÅä
1¡¢ JavaÓм¸ÖÖ´æ´¢ÇøÓò£¿
* ¼Ä´æÆ÷
     -- ÔÚCP ......

JavaÄÚ´æ¹ÜÀí(¶þ¡¢JavaÀ¬»ø»ØÊÕ)

¶þ¡¢JavaÀ¬»ø»ØÊÕ
1. JVMÔËÐл·¾³ÖÐÀ¬»ø¶ÔÏóµÄ¶¨Òå
     Ò»¸ö¶ÔÏó´´½¨ºó±»·ÅÖÃÔÚJVMµÄ¶ÑÄÚ´æÖУ¬µ±ÓÀÔ¶²»ÔÙÒýÓÃÕâ¸ö¶ÔÏóʱ£¬Ëü½«±»JVMÔÚ¶ÑÄÚ´æÖлØÊÕ¡£»ò  µ±¶ÔÏóÔÚJVMÔËÐпռäÖÐÎÞ·¨Í¨¹ý¸ù¼¯ºÏ(root set)µ½´ïʱ£¬Õâ¸ö¶ÔÏó¾Í±»³ÆÎªÀ¬»ø¶ÔÏó¡£
2. ¶ÑÄÚ´æ
* ÔÚJVMÆô¶¯Ê±±»´´½¨£»¶ÑÄÚ´æÖÐËù´æ´¢µ ......

Çø±ðjavaµÄ C++ÄÚ´æ·ÖÅä ֪ʶ,È«¾Ö£¬¾Ö²¿£¬¾²Ì¬±äÁ¿


Ô¤±¸ÖªÊ¶—³ÌÐòµÄÄÚ´æ·ÖÅä 
Ò»¸öÓÉC/C++±àÒëµÄ³ÌÐòÕ¼ÓõÄÄÚ´æ·ÖΪÒÔϼ¸¸ö²¿·Ö 
1¡¢Õ»Çø£¨stack£©— ÓɱàÒëÆ÷×Ô¶¯·ÖÅäÊÍ·Å £¬´æ·Åº¯ÊýµÄ²ÎÊýÖµ£¬¾Ö²¿±äÁ¿µÄÖµµÈ¡£Æä²Ù×÷·½Ê½ÀàËÆÓÚÊý¾Ý½á¹¹ÖеÄÕ»¡£ 
2¡¢¶ÑÇø£¨heap£© — Ò»°ãÓɳÌÐòÔ±·ÖÅäÊÍ·Å£¬ Èô³ÌÐòÔ±²»ÊÍ·Å£¬³ÌÐò½áÊøÊ±¿ÉÄÜÓÉOS»ØÊÕ ......

Java³ÌÐòµÄÎÊÌâ

ÕâÊÇÒ»¶ÎÎҲο¼µÄJava³ÌÐò×ֶΣ¬ÒѾ­µ÷ÊÔ¿ÉÒÔͨEclipseÔËÐÐÁË£¬´úÂëÓе㿴²»¶®£¬ÄÄλ¸ßÊÖ¿ÉÒÔ°ïÎÒ×ö¸öÖÐÎÄ×¢ÊÍ£¿Ð»Ð»À²~~
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import ja ......

JAVA²Ù×÷XMLµÄÍêÕûÀý×Ó


JAVA²Ù×÷XMLµÄÍêÕûÀý×Ó——W3C DOM
JAVA²Ù×÷XMLµÄÍêÕûÀý×Ó——W3C DOMƪÊÕ²Ø
ÕâÊÇÒ»¸öÓÃJAVA W3C DOM ½øÐÐXML²Ù×÷µÄÀý×Ó£¬°üº¬Á˲éѯ¡¢Ôö¼Ó¡¢Ð޸ġ¢É¾³ý¡¢±£´æµÄ»ù±¾²Ù×÷¡£½ÏÍêÕûµÄÃèÊöÁËÒ»¸öXMLµÄÕû¸ö²Ù×÷Á÷³Ì¡£ÊʺϸÕÈëÃÅJAVA XML²Ù×÷µÄÅóÓѲο¼ºÍѧϰ¡£
¼ÙÉèÓÐXMLÎļþ£ºtest1.xml
<?xml v ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ