VC++,Javaµ½µ×¸ÃѧÄǸö£¿
ÏÖÔںܶàÈ˶¼ÎÊ C++ºÍJava ÄĸöºÃ. Æäʵ¼¼ÊõÉϸ÷Óи÷µÄºÃ´¦Óë²»×ã,ÎÒÏë´ó¼ÒËù˵µÄºÃ²»ºÃÖ¸µÃÊÇǰ;ºÃ²»ºÃ,׬µÄ¶à²»¶à.
Ҫ˵׬Ǯ×î¶àµÄ¿Ï¶¨ÊÇC++ÁË.ÒòΪһÃż¼ÊõÊÇ·ñֵǮȫ¿´»áËüµÄÈËÓжàÉÙ¶ø²»ÔÚÓÚÕâ¸ö¼¼Êõ±¾ÉíµÄºÃ»µ. C++Éæ¼°Ó²¼þµ×²ãµÄ¶«Î÷±È½Ï¶à,ѧÆðÀ´ºÜ¸´ÔÓ,»áµÄÈËÉÙ,ËùÒÔֵǮ.
ÔÙ˵Java java׬µÄǮҲ²»²î,µ«ÊÇjava×ö³öÀ´µÄ¶«Î÷ÐÔÄܿ϶¨ÊÇûÓÐC++ºÃ,²»¹ýÏÖÔÚCPU ÄÚ´æÒѾ²»Ïñ´ÓǰÁË,ÕâÐÔÄÜÎÊÌâÒѾ²»ÖØÒªÁË. ÆäʵC++ºÍjavaµÄÇø±ð²»Ö»ÔÚÐÔÄÜÉÏ,²»¹ýÎÒˮƽ²»ÐÐ,˵²»³öÀ´. javaºÍC++±ÈÆðÀ´ÊǺÃѧ¶àÁË.
ÔÛÃÇѧÕâЩÊÇΪÁËʲô?ΪÁ˹¤×÷, ¹¤×÷ΪÁËʲô,×îÖØÒªµÄÊÇΪÁËÉú»î. ºÜ¶àÈËÏÖÔÚ¶¼ÔÚ˵ÄĸöÓïÑÔÀ÷º¦,»áÄĸöÓïÑÔ²ÅÊÇÕæÕýµÄNB³ÌÐòÔ±. Æäʵ×öѧÊõÉϵÄÌÖÂÛ»¹¿ÉÒÔ, ±ðÍüÁ˳ÌÐòÔ±ÊÇÇà´º·¹,Äê¼ÍÉÔ΢´óµã¾Í×ö²»¶¯ÁË.×ö²»µ½Áìµ¼¾ÍÐèҪתÐÐ,¶øÁìµ¼¾Í²»ÐèÒª¾«Í¨¼¼ÊõÁË. ËùÒÔÎÞÂÛÄÄÖÖÓïÑÔÖ»ÒªÄÜÕÒµ½¹¤×÷µÄ¾Í¿ÉÒÔ!
ÎÒÏòÂ¥Ö÷ÍÆ¼öJava, ÀíÓÉÊÇJavaºÃѧ,Ó¦ÓÃÃæ¹ã,ѧϰÖÜÆÚ±ÈC++¶Ì.±ãÓÚÄãÕÒ¹¤×÷. ÓеÄÈËҲ˵Java»á¹ýʱʲôµÄ,ÄãÒ²²»Óõ£ÐÄ,¾ÍËãJavaÕæµÄ¹ýʱÁË,ÄÇʱºòÄãÔçÒѾ×öÉÏÁìµ¼»òתÐÐ×÷±ðµÄÁË,¸úÄãÍêȫûÓйØÏµ.Èç¹ûÄãϲ»¶×êÑбà³Ì,¿ÉÒÔÔÚ¹¤×÷ÒÔºó ÉõÖÁÍËÐÝÁË È¥Ñо¿ÏÂC++.
Ïà¹ØÎĵµ£º
1. ¹ØÓÚConnection Pool
JDBC±¾Éí²»ÌṩÁ¬½Ó³Ø¼¼Êõ£¬ÐèÒªµÚÈý·½¿âµÄÖ§³Ö¡£
ÔÚÐèҪƵ·±»ñµÃÁ¬½ÓµÄApplicationÖÐ×îºÃÓÃConnection Pool£¬ÈçWeb ApplicationÖÐ
¶ÔÓÚÒ»°ãµÄJava ApplicationÔò¿ÉÒÔÖ±½ÓÓÃJDBCÁ¬½ÓÊý¾Ý¿â¡£
2. Java ApplicationÖÐÁ¬½ÓDB2
°²×°DB2 Personal Edition V9Ö®ºó£¬ÔÚÆäÖ ......
package com.project.ajaxs;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.Calendar;
import java.uti ......
Java ¼¼ÊõÊÇʲô£¿
Java ¼¼Êõ¼ÈÊÇÒ»Öָ߼¶µÄÃæÏò¶ÔÏóµÄ±à³ÌÓïÑÔ£¬Ò²ÊÇÒ»¸öƽ̨¡£Java ¼¼Êõ»ùÓÚ Java ÐéÄâ»ú£¨Java virtual machine£¬JVM£©µÄ¸ÅÄî —— ÕâÊÇÓïÑÔÓëµ×²ãÈí¼þºÍÓ²¼þÖ®¼äµÄÒ»ÖÖת»»Æ÷¡£Java ÓïÑÔµÄËùÓÐʵÏÖ¶¼±ØÐëʵÏÖ JVM£¬´Ó¶øÊ¹ Java ³ÌÐò¿ÉÒÔÔÚÓÐ JVM µÄÈκÎϵͳÉÏÔËÐС£
Java ±à³ÌÓïÑÔ£¨Java p ......
1¡¢ÔÚoracleµÄsys-sysdbaϵǽ
дһ¸öjava source³ÌÐòÁ´½Ósqlserver2005£º
create or replace and compile java source named test as
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
public class excutesql1
{
public static String entry ......
×Ô¶¨ÒåµÄKeyÀàÐèÒªÖØÔØequals, hashCodeº¯Êý¡£¡£
package com.albert.test;
import java.util.Vector;
import java.util.HashMap;
/**
* @author tough_guy
*
*/
//¶ÔÓÚ×Ô¶¨ÒåµÄkey£¬ ÐèÒªÖØÔØhashCodeº¯ÊýºÍequalsº¯Êý
class IPSegment
{
long ip_s;
long ip_e;
int p;
IPSegment Reset(long f ......