Ò»¸öjava¾²Ì¬±äÁ¿µÄС³ÌÐòÒÉÎÊ
public class Demo
{
static int i=1;
static
{
i++;
}
public Demo()
{
i++;
}
public static void main(String[] args)
{
Demo d1=new Demo();
System.out.println(d1.i);
Demo d2=new Demo();
System.out.println(d2.i);
}
}
ÔËÐнá¹ûÊÇ£º
3
4
¸Õ¸Õ¿ªÊ¼Ñ§java£¬ºÜÃÔ»ó¡£Çó´Ë³ÌÐòµÄÖ´Ðйý³Ì£¡£¡
Ïà¹ØÎĵµ£º
°²×°ÍêUbuntu8.1Ö®ºó£¬Èç¹ûÏëÒª¿ª·¢»òÔËÐÐJava³ÌÐò£¬¾ÍÐèÒª°²×°JDK»òJRE¡£ÏÂÃæ¾Í½éÉÜÒ»ÖÖ×îΪ¼ò±ãµÄÔÚUbuntuÖа²×°JDK
µÄ·½·¨¡£
ÖÚËùÖÜÖª£¬Sun¹«Ë¾¶ÔÓÚLinuxϵĵÄJDK°²×°¿ØÖÆÊÇÏ൱Ñϸñ£º£¨1£©Ô¤±àÒë³É¶þ½øÖƵÄJDK°üÊÇÐèҪȡµÃSun¹«Ë¾ÊÚȨµÄ£»£¨2£©Sun¹«
˾ÓÐ×Ô¼ºµÄUnix²Ù×÷ϵͳ¡£»òÐíÊÇÒòΪÕâÁ½µãÔÒò£¬Ä¿Ç°ÔÚLinux»òU ......
ºìÉ«×ÖÌåΪÖ÷Òª´úÂë
jspÒ³ÃæÖÐ
<script language="javascript">
function updateDB(operate){
var objDom=new ActiveXObject("msxml.DomDocument");
var objRoot=objDom.createElement("All");
objDom.appendChild(objRoot);
var k=document.ge ......
Java5ÖÐÌṩÁËеÄ×¢ÊÍ£¨Annotation£©£¬Äܹ»ÎªÀàÌṩ¶îÍâÐÅÏ¢£¬±¾ÎĽéÉÜÁËÈçºÎ¶¨Òå×¢ÊÍ¡¢ÈçºÎʹÓÃ×¢ÊͺÍÈçºÎ½âÎö×¢ÊÍ¡£
1¡¢¶¨Òå×¢ÊÍ
package ch5;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Ta ......
JavaÖÐÌṩÁËClassÀ࣬¿ÉÒÔͨ¹ýClassÀà»ñÈ¡ÀàµÄ¶¨ÒåÐÅÏ¢£¬°üÀ¨°üÃû¡¢ÀàÃû¡¢ÀàÉϵÄ×¢ÊÍ£¨Annotation£©¡¢ÀàµÄÐÞÊηû¡¢¸¸Àà¡¢¼Ì³ÐµÄ½Ó¿Ú¡¢¹¹Ôì·½·¨¡¢³ÉÔ±±äÁ¿ºÍ³ÉÔ±·½·¨¡£ÕâЩÐÅÏ¢·Ö±ðʹÓÃjava.lang.annotation.Annotation¡¢ java.lang.reflect.Constructor¡¢java.lang.reflect.Field¡¢java.lang.reflect.Method¡¢java.lang.re ......
ʲôÊǶÑÕ»£¬¹ØÓÚÕâ¸öÃû´Ê£¬ÎÒÔÚ°Ù¶È£¬googleËÑË÷Á˰ëÌ죬ҲûÓз¢ÏÖÒ»¸ö±È½ÏȨÍþµÄ½âÊÍ£¬»¹ÓÐÐí¶à×ÊÁÏÓïÑɲ»Ï꣬¾ÍÒÔά»ù°Ù¿ÆµÄ½âÊÍΪ׼°É£¬ºÍÎÒ¼ÇÒäÖеÄÒ»Ö¡£
¶ÑÕ»£¨Ó¢ÎÄ£ºstack£©£¬Öйú´ó½×÷¶ÑÕ»£¬Ì¨Íå×÷¶Ñµþ£¬ÔÚ¼ÆËã»ú¿Æ學ÖУ¬ÊÇÒ»種ÌØÊâµÄ´®ÁÐÐÎʽµÄ資ÁÏ結構£¬ËüµÄÌØÊâÖ®處ÔÚì ......