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

javaʵÏÖÑéÖ¤Âë

javaÑéÖ¤ÂëµÄʵÏÖ(Ò»)
ÊÕ²Ø



1.ImageServletÀàµÄʵÏÖ£º
package com.mobile.control;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ImageServlet extends HttpServlet {
       public void doGet(HttpServletRequest request,
HttpServletResponse response)
                     throws ServletException, IOException {
              this.doPost(request, response);
       }
       // Éú³ÉÊý×ÖºÍ×ÖĸµÄÑéÖ¤Âë
       public void doPost(HttpServletRequest request,
HttpServletResponse response)
                     throws ServletException, IOException {
              BufferedImage img = new BufferedImage(68, 22,
                            BufferedImage.TYPE_INT_RGB);
              // µÃµ½¸ÃͼƬµÄ»æÍ¼¶ÔÏó
              Graphics g = img.getGraphics();
              Random r = new Random();
&


Ïà¹ØÎĵµ£º

java ÃæÊÔÌâ

Java
»ù´¡·½Ãæ
:
1
¡¢
char
ÐͱäÁ¿ÖÐÄܲ»ÄÜ´æÖüÒ»¸öÖÐÎĺº×Ö
?
Ϊʲô
?
´ð£º
ÊÇÄܹ»¶¨Òå³ÉΪһ¸öÖÐÎĵģ¬ÒòΪjavaÖÐÒÔunicode±àÂ룬һ¸öcharÕ¼16×Ö½Ú£¬ËùÒÔ·ÅÒ»¸öÖÐÎÄÊÇûÎÊÌâµÄ
2:
À¬»ø»ØÊÕ»úÖÆ
,
ÈçºÎÓÅ»¯³ÌÐò

A:javaÖеÄÀ¬»øÊÕ¼¯
£¨Garbage Collection,GC£©ÓÃÀ´»ØÊÕÄÇЩ¹ýÈ¥·ÖÅäµÄ²»ÔÙÓ ......

Java Observer Pattern

²é¿´×îо«»ªÎÄÕ Çë·ÃÎʲ©¿ÍÊ×Ò³Ïà¹ØÎÄÕ ͨÓøßУÅÅ¿ÎËã·¨Ñо¿----ǰÑÔjava cloneÏê½âÈ«ÃæÉîÈë½éÉÜC++×Ö·û´®£ºstringÀàÔÆ¼ÆËãµ¼ÂÛFreeMarker±Ê¼Ç²ÔÓ¥-GISRenÂþ»°GISÁÖÊÏÎïÓï.³¯»¨Ï¦Ê°Ö®ºÞ·êÇäÍíÎ人¾¹Éý¹«Ë¾ WebSphere Portal ÄÚÈݹÜÀíÉý¼¶ÊµÊ©·½°¸ ......

java ÃæÊÔÌâ 2

Jsp
·½Ãæ
jspµÄ³£ÓõÄÃüÁî´ð£ºpage, include, talib, forward,
Servlet
·½Ãæ
1
¡¢ËµÒ»Ëµ
Servlet
µÄÉúÃüÖÜÆÚ
?
´ð:servletÓÐÁ¼ºÃ
µÄÉú´æÆÚµÄ¶¨Ò壬°üÀ¨¼ÓÔØºÍʵÀý»¯¡¢³õʼ»¯¡¢´¦ÀíÇëÇóÒÔ¼°·þÎñ½áÊø¡£Õâ¸öÉú´æÆÚÓÉjavax.servlet.Servlet½Ó¿ÚµÄ
init,serviceºÍdestroy·½·¨±í´ï¡£
2
¡¢
Servlet
°æ±¾¼ä
(
ÍüÁ ......

JavaÊÖ²áÖÐjava.util.RandomµÄÃèÊö£¬Ëæ»úÊý²úÉúËã·¨


java.util
Àà Random
java.lang.Object

java.util.Random
ËùÓÐÒÑʵÏֵĽӿڣº

Serializable
Ö±½ÓÒÑÖª×ÓÀࣺ

SecureRandom
public class Random
extends Object
implements Serializable
´ËÀàµÄʵÀýÓÃÓÚÉú³ÉÎ±Ëæ»úÊýÁ÷¡£´ËÀàʹÓà 48 λµÄÖÖ×Ó£¬Ê¹ÓÃÏßÐÔͬÓ๫ʽ¶ÔÆä½øÐÐÐ޸ģ¨Çë²ÎÔÄ Donald Knuth µÄ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ