javaµÄCollectionºÍMapÏê½â
ÏßÐÔ±í£¬Á´±í£¬¹þÏ£±íÊdz£ÓõÄÊý¾Ý½á¹¹£¬ÔÚ½øÐÐJava¿ª·¢Ê±£¬JDKÒѾΪÎÒÃÇÌṩÁËһϵÁÐÏàÓ¦µÄÀàÀ´ÊµÏÖ»ù±¾µÄÊý¾Ý½á¹¹¡£ÕâЩÀà¾ùÔÚjava.util°üÖС£±¾ÎÄÊÔͼͨ¹ý¼òµ¥µÄÃèÊö£¬Ïò¶ÁÕß²ûÊö¸÷¸öÀàµÄ×÷ÓÃÒÔ¼°ÈçºÎÕýȷʹÓÃÕâЩÀà¡£
Collection
©ÀList
©¦©ÀLinkedList
©¦©ÀArrayList
©¦©¸Vector
©¦¡¡©¸Stack
©¸Set
Map
©ÀHashtable
©ÀHashMap
©¸WeakHashMap
Collection½Ó¿Ú
¡¡¡¡CollectionÊÇ×î»ù±¾µÄ¼¯ºÏ½Ó¿Ú£¬Ò»¸öCollection´ú±íÒ»×éObject£¬¼´CollectionµÄÔªËØ£¨Elements£©¡£Ò»Ð©CollectionÔÊÐíÏàͬµÄÔªËØ¶øÁíһЩ²»ÐС£Ò»Ð©ÄÜÅÅÐò¶øÁíһЩ²»ÐС£Java SDK²»Ìṩֱ½Ó¼Ì³Ð×ÔCollectionµÄÀ࣬Java SDKÌṩµÄÀà¶¼ÊǼ̳Ð×ÔCollectionµÄ“×Ó½Ó¿Ú”ÈçListºÍSet¡£
¡¡¡¡ËùÓÐʵÏÖCollection½Ó¿ÚµÄÀà¶¼±ØÐëÌṩÁ½¸ö±ê×¼µÄ¹¹Ô캯Êý£ºÎÞ²ÎÊýµÄ¹¹Ô캯ÊýÓÃÓÚ´´½¨Ò»¸ö¿ÕµÄCollection£¬ÓÐÒ»¸öCollection²ÎÊýµÄ¹¹Ô캯ÊýÓÃÓÚ´´½¨Ò»¸öеÄCollection£¬Õâ¸öеÄCollectionÓë´«ÈëµÄCollectionÓÐÏàͬµÄÔªËØ¡£ºóÒ»¸ö¹¹Ô캯ÊýÔÊÐíÓû§¸´ÖÆÒ»¸öCollection¡£
¡¡¡¡ÈçºÎ±éÀúCollectionÖеÄÿһ¸öÔªËØ£¿²»ÂÛCollectionµÄʵ¼ÊÀàÐÍÈçºÎ£¬Ëü¶¼Ö§³ÖÒ»¸öiterator()µÄ·½·¨£¬¸Ã·½·¨·µ»ØÒ»¸öµü´ú×Ó£¬Ê¹Óøõü´ú×Ó¼´¿ÉÖðÒ»·ÃÎÊCollectionÖÐÿһ¸öÔªËØ¡£µäÐ͵ÄÓ÷¨ÈçÏ£º
¡¡¡¡¡¡¡¡Iterator it = collection.iterator(); // »ñµÃÒ»¸öµü´ú×Ó
¡¡¡¡¡¡¡¡while(it.hasNext()) {
¡¡¡¡¡¡¡¡¡¡¡¡Object obj = it.next(); // µÃµ½ÏÂÒ»¸öÔªËØ
¡¡¡¡¡¡¡¡}
¡¡¡¡ÓÉCollection½Ó¿ÚÅÉÉúµÄÁ½¸ö½Ó¿ÚÊÇListºÍSet¡£
List½Ó¿Ú
¡¡¡¡ListÊÇÓÐÐòµÄCollection£¬Ê¹Óô˽ӿÚÄܹ»¾«È·µÄ¿ØÖÆÃ¿¸öÔªËØ²åÈëµÄλÖá£Óû§Äܹ»Ê¹ÓÃË÷Òý£¨ÔªËØÔÚListÖеÄλÖã¬ÀàËÆÓÚÊý×éϱ꣩À´·ÃÎÊListÖеÄÔªËØ£¬ÕâÀàËÆÓÚJavaµÄÊý×é¡£
ºÍÏÂÃæÒªÌáµ½µÄSet²»Í¬£¬ListÔÊÐíÓÐÏàͬµÄÔªËØ¡£ &nbs
Ïà¹ØÎĵµ£º
java ËÄÖÖ±éÀúListµÄ·½·¨¼°±È½Ï
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class ListTest {
public static void main(String args[]){
List<Long> lists = new ArrayList<Long>();
for(Long i=0l;i<1000000l;i++){
......
Ò»Ö±¶¼¸Ðµ½ºÜÃÔ㣬¶ÔÓÚÓïÑÔµÄÑ¡Ôñ£¬ÒòΪ»¹ÊDzËÄñµÄÔÒò£¬ÎÞ·¨¿´Í¸ÀïÃæµÄÖÖÖÖ¹ØÏµ£¬Ò»Ö±ÔÚ¾À½áÆäÖС£Æäʵ×Ô¼ºÒ²Ã÷°×“´óµÀÖÁ¼ò”£¬µ«»¹Êǰ´ÄͲ»×¡¿ñÏëµÄ˼Ð÷£¬ÌرðÊǵ±´Ó¹«Ë¾³ö²î»ØÀ´Ö®ºó£¬¼¸Ì춼ûÓÐ×öʲôÊÂÇé¡£
¶ÔCÓÐÒ»ÖÖÆ«ºÃ£¬ËùÒÔÒ»Ö±ÔÚÐÄÀï¾ÍÓеãÅųâjava¡£ËäÈ»javaÖÐÒ²ÓкܶණÎ÷Ҫѧ£¬µ«ÊÇDZÒâʶÀïÃæ¶ÔÕ ......
ÎÄÕÂÔ´´£¬×ªÔØÇëÓëBlogÖ÷ÈËÁªÏµ£¬robin9257@hotmail.com
JAVAÓëSQLÇŽӵÄÓÅȱµã£º
1¡¢Óŵ㣺²»ÓÃÏÂÔØÇý¶¯³ÌÐò£¬ÔÊÐíÓÃÏàͬ´úÂë·ÃÎʲ»Í¬DBMS¡£
2¡¢È±µã£ºÐ§Âʵ͡£
¾³£³öÏֵı¨´íµã£º
1¡¢java.sql.SQLException: [Microsoft][ODBC Çý¶¯³ÌÐò¹ÜÀíÆ÷] δ·¢ÏÖÊý¾ÝÔ´Ãû³Æ²¢ÇÒδָ¶¨Ä¬ÈÏÇý¶¯³ÌÐò
&nbs ......
JAVAѧϰµÄÒ»Ð©ÖØµã
1. JavaÓïÑÔ»ù´¡
̸µ½JavaÓïÑÔ»ù´¡Ñ§Ï°µÄÊé¼®£¬´ó¼Ò¿Ï¶¨»áÍÆ¼öBruce EckelµÄ¡¶Thinking in Java¡·¡£ËüÊÇÒ»±¾Ð´µÄÏ൱Éî¿ÌµÄ¼¼ÊõÊé¼®£¬JavaÓïÑÔ»ù´¡²¿·Ö»ù±¾Ã»ÓÐÆäËüÈκÎÒ»±¾Êé¿ÉÒÔ³¬Ô½Ëü¡£¸ÃÊéµÄ×÷ÕßBruce EckelÔÚÍøÂçÉϱ»³ÆÎªÌì²ÅµÄͶ»úÕߣ¬×÷Õߵġ¶Thinking in C++¡·ÔÚ1995ÄêÔø»ñSoftwareDev ......
ÃæÏòJavaÓ¦ÓõĿìËÙWeb·þÎñÖ§³Ö¹¤¾ß - Netrifex
Proxisoft½ñÌìÐû²¼Netrifex 1.0°æ¡£
Netrifex¿ÉÒÔÁ¢¼´°ÑWeb ServicesÌí¼Óµ½ÏÖÓеÄJava SEºÍJava EEÓ¦ÓóÌÐò£¬´Ó¶øÊµÏÖ°ÑWeb Services¿ìËÙ¡¢µÍ·ÑÓõIJ¿Êðµ½Õû¸öÆóÒµÓ¦Óá£
NetrifexÔö¼ÓWeb Servicesµ½ÏÖÓеÄJavaÓ¦ÓÃÖС£¸Ã²úƷʹÓû§Äܹ»£º
* ¿ìËÙ´´½¨Web Service ......