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Runtime.getRuntime().maxMemory(); // ÐéÄâ»ú¿ÉÒÔ¿ØÖƵÄ×î´óÄÚ´æÊýÁ¿
Runtime.getRuntime().totalMemory(); // ÐéÄâ»úµ±Ç°ÒѾʹÓõÄÄÚ´æÊýÁ¿
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-Xms<size> set initial Java heap size ÉèÖÃJVM³õʼ»¯¶ÑÄÚ´æ´óС
-Xmx<size> set maximum Java heap size ÉèÖÃJVM×î´óµÄ¶ÑÄÚ´æ´óС
-Xss<size> set java thread stack size ÉèÖÃJVMÕ»ÄÚ´æ´óС
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set JPDA_ADDRESS=8787
set JPDA_TRANSPORT=dt_socket
set JAVA_OPTS=-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=8787,server=y,suspend=n %JAVA_OPTS%
startup
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// attachment:×÷Ϊ¸½¼þÏÂÔØ | inline:ÔÚÏß´ò¿ª
response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\";");
// Ò»¶¨Òª±£Ö¤Ã»ÓÐ×ö¹ý¹ØÓÚ½ûÖ¹ä¯ÀÀÆ÷»º´æµÄ²Ù×÷
// response.setHeader("Pragma", "No-cache");
// response.setHeader("Cache-Control", "No-cache");
// response.setDateHeader("Expires", 0);
Java·´ÉäÅжϷ½·¨ÓÐûÓзµ»ØÖµ
method.getReturnType() == void.class // ûÓзµ»ØÖµ
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newProxyInstance(ClassLoader loader, Class[] interfaces, InvocationHandler ......
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Let's begin by downloading the latest version of JRE (Java Runtime
Environment) from here
.
Just click on the Download link where it says Java Runtime
Environment (JRE) 5.0 Update
, then you�ll need to accept the license
and download the Linux self-extracting file
.By default, Fe ......
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/**
*the First Java
*@author wanglei
*@version 1.0
*/
import java.util.Scanner;
public class FirstJava{
public static void main(String[] args){
/**ÉùÃ÷Á½¸öÕûÐͱäÁ¿*/
int opA ......