Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

javaÖÐstringBuilderµÄÓ÷¨

String ¶ÔÏóÊDz»¿É¸Ä±äµÄ¡£Ã¿´ÎʹÓà System.String ÀàÖеķ½·¨Ö®Ò»Ê±£¬¶¼ÒªÔÚÄÚ´æÖд´½¨Ò»¸öеÄ×Ö·û´®¶ÔÏó£¬Õâ¾ÍÐèҪΪ¸ÃжÔÏó·ÖÅäеĿռ䡣ÔÚÐèÒª¶Ô×Ö·û´®Ö´ÐÐÖظ´Ð޸ĵÄÇé¿öÏ£¬Óë´´½¨Ð嵀 String ¶ÔÏóÏà¹ØµÄϵͳ¿ªÏú¿ÉÄÜ»á·Ç³£°º¹ó¡£Èç¹ûÒªÐÞ¸Ä×Ö·û´®¶ø²»´´½¨ÐµĶÔÏó£¬Ôò¿ÉÒÔʹÓà System.Text.StringBuilder Àà¡£ÀýÈ磬µ±ÔÚÒ»¸öÑ­»·Öн«Ðí¶à×Ö·û´®Á¬½ÓÔÚÒ»Æðʱ£¬Ê¹Óà StringBuilder Àà¿ÉÒÔÌáÉýÐÔÄÜ¡£
ͨ¹ýÓÃÒ»¸öÖØÔصĹ¹Ô캯Êý·½·¨³õʼ»¯±äÁ¿£¬¿ÉÒÔ´´½¨ StringBuilder ÀàµÄÐÂʵÀý£¬ÕýÈçÒÔÏÂʾÀýÖÐËù²ûÊ͵ÄÄÇÑù¡£
StringBuilder MyStringBuilder = new StringBuilder("Hello World!");
ÉèÖÃÈÝÁ¿ºÍ³¤¶È
ËäÈ» StringBuilder ¶ÔÏóÊǶ¯Ì¬¶ÔÏó£¬ÔÊÐíÀ©³äËüËù·â×°µÄ×Ö·û´®ÖÐ×Ö·ûµÄÊýÁ¿£¬µ«ÊÇÄú¿ÉÒÔΪËü¿ÉÈÝÄɵÄ×î´ó×Ö·ûÊýÖ¸¶¨Ò»¸öÖµ¡£´ËÖµ³ÆΪ¸Ã¶ÔÏóµÄÈÝÁ¿£¬²»Ó¦½«ËüÓ뵱ǰ StringBuilder ¶ÔÏóÈÝÄɵÄ×Ö·û´®³¤¶È»ìÏýÔÚÒ»Æð¡£ÀýÈ磬¿ÉÒÔ´´½¨ StringBuilder ÀàµÄ´øÓÐ×Ö·û´®“Hello”£¨³¤¶ÈΪ 5£©µÄÒ»¸öÐÂʵÀý£¬Í¬Ê±¿ÉÒÔÖ¸¶¨¸Ã¶ÔÏóµÄ×î´óÈÝÁ¿Îª 25¡£µ±ÐÞ¸Ä StringBuilder ʱ£¬ÔÚ´ïµ½ÈÝÁ¿Ö®Ç°£¬Ëü²»»áΪÆä×Ô¼ºÖØзÖÅä¿Õ¼ä¡£µ±´ïµ½ÈÝÁ¿Ê±£¬½«×Ô¶¯·ÖÅäеĿռäÇÒÈÝÁ¿·­±¶¡£¿ÉÒÔʹÓÃÖØÔصĹ¹Ô캯ÊýÖ®Ò»À´Ö¸¶¨ StringBuilder ÀàµÄÈÝÁ¿¡£ÒÔÏ´úÂëʾÀýÖ¸¶¨¿ÉÒÔ½« MyStringBuilder ¶ÔÏóÀ©³äµ½×î´ó 25 ¸ö¿Õ°×¡£
StringBuilder MyStringBuilder = new StringBuilder("Hello World!", 25);
ÁíÍ⣬¿ÉÒÔʹÓöÁ/д Capacity ÊôÐÔÀ´ÉèÖöÔÏóµÄ×î´ó³¤¶È¡£ÒÔÏ´úÂëʾÀýʹÓà Capacity ÊôÐÔÀ´¶¨Òå¶ÔÏóµÄ×î´ó³¤¶È¡£
MyStringBuilder.Capacity = 25;
EnsureCapacity ·½·¨¿ÉÓÃÀ´¼ì²éµ±Ç° StringBuilder µÄÈÝÁ¿¡£Èç¹ûÈÝÁ¿´óÓÚ´«µÝµÄÖµ£¬Ôò²»½øÐÐÈκθü¸Ä£»µ«ÊÇ£¬Èç¹ûÈÝÁ¿Ð¡ÓÚ´«µÝµÄÖµ£¬Ôò»á¸ü¸Äµ±Ç°µÄÈÝÁ¿ÒÔʹÆäÓë´«µÝµÄֵƥÅä¡£
Ò²¿ÉÒԲ鿴»òÉèÖà Length ÊôÐÔ¡£Èç¹û½« Length ÊôÐÔÉèÖÃΪ´óÓÚ Capacity ÊôÐÔµÄÖµ£¬Ôò×Ô¶¯½« Capacity ÊôÐÔ¸ü¸ÄΪÓë Length ÊôÐÔÏàͬµÄÖµ¡£Èç¹û½« Length ÊôÐÔÉèÖÃΪСÓÚµ±Ç° StringBuilder ¶ÔÏóÄÚµÄ×Ö·û´®³¤¶ÈµÄÖµ£¬Ôò»áËõ¶Ì¸Ã×Ö·û´®¡£
ÐÞ¸Ä StringBuilder ×Ö·û´®
ϱíÁгöÁË¿ÉÒÔÓÃÀ´ÐÞ¸Ä StringBuilder µÄÄÚÈݵķ½·¨¡£
·½·¨Ãû ʹÓÃ
StringBuilder.Append ½«ÐÅÏ¢×·¼Óµ½µ±Ç° StringBuilder µÄ½áβ¡£
StringBuilder.AppendFormat Óôø¸ñʽÎı¾Ìæ»»×Ö·û´®Öд«µÝµÄ¸ñʽ˵Ã÷·û¡£
StringBuilder.Insert ½«×Ö·û´®»ò¶ÔÏó²å


Ïà¹ØÎĵµ£º

JAVA»ù´¡

ÿ¸ö³õѧÕ߶¼Ó¦¸Ã¸ã¶®µÄÎÊÌ⣡¶ÔÓÚÕâ¸öϵÁÐÀïµÄÎÊÌ⣬ÿ¸öѧJavaµÄÈ˶¼Ó¦¸Ã¸ã¶®¡£µ±È»£¬Èç¹ûÖ»ÊÇѧJavaÍæÍæ¾ÍÎÞËùνÁË¡£Èç¹ûÄãÈÏΪ×Ô¼ºÒѾ­³¬Ô½³õѧÕßÁË£¬È´²»ºÜ¶®ÕâЩÎÊÌ⣬Ç뽫Äã×Ô¼ºÖعé³õѧÕßÐÐÁС£ÄÚÈݾùÀ´×ÔÓÚCSDNµÄ¾­µäÀÏÌù¡£
ÎÊÌâÒ»£ºÎÒÉùÃ÷ÁËʲô£¡
String s = "Hello world!";
Ðí¶àÈ˶¼×ö¹ýÕâÑùµÄÊÂÇ飬µ«Ê ......

ÈçºÎ×ÔѧjavaѸËÙ³ÉΪjava¸ßÊÖ

ºÜ¶àÍøÓÑ×ÉѯѧϰJavaÓÐûÓÐʲô½Ý¾¶,ÎÒ˵“ÎÞËû£¬Î¨ÊÖÊì¶û”¡£µ«ÊÇÉÐѧÌÃÔ¸Ò⽫һЩ¾­Ñéд³öÀ´£¬ÒÔ±ãºóÀ´ÕßÉÙ×ßÍä·,°ïÖú±ðÈËÊÇ×î´óµÄ¿ìÀÖÂ
ÒªÏëѧºÃJava£¬Ê×ÏÈÒªÖªµÀJavaµÄ´óÖ·ÖÀà¡£ÎÒÃÇÖªµÀ£¬×Ô´ÓSunÍƳöJavaÒÔÀ´£¬¾ÍÁ¦Í¼Ê¹Ö®ÎÞËù²»°ü£¬ËùÒÔJava·¢Õ¹µ½ÏÖÔÚ£¬°´Ó¦ÓÃÀ´·ÖÖ÷Òª·ÖΪÈý´ó¿é£ºJ2SE,J2MEºÍJ2EE, ......

dz̸Java¶àÏ̵߳Äͬ²½ÎÊÌâ

    ¶àÏ̵߳Äͬ²½ÒÀ¿¿µÄÊǶÔÏóËø»úÖÆ£¬synchronized¹Ø¼ü×ֵı³ºó¾ÍÊÇÀûÓÃÁË·âËøÀ´ÊµÏÖ¶Ô¹²Ïí×ÊÔ´µÄ»¥³â·ÃÎÊ¡£
ÏÂÃæÒÔÒ»¸ö¼òµ¥µÄʵÀýÀ´½øÐжԱȷÖÎö¡£ÊµÀýÒªÍê³ÉµÄ¹¤×÷·Ç³£¼òµ¥£¬¾ÍÊÇ´´½¨10¸öỊ̈߳¬Ã¿¸öÏ̶߳¼´òÓ¡´Ó0µ½99Õâ100¸öÊý×Ö£¬ÎÒÃÇÏ£ÍûÏß³ÌÖ®¼ä²»»á³öÏÖ½»²æÂÒÐò´òÓ¡£¬¶øÊÇ˳ÐòµØ´òÓ¡¡£
ÏÈÀ´¿´µÚÒ»¶ ......

javaʵÏÖzipÎļþѹËõ£¬½âѹ

Õ⼸Ìì¿´ÁËÍøÉÏһЩǰ±²µÄ´úÂ룬×Ô¼º¶ÔJavaʵÏÖzipÎļþµÄ½âѹ£¬Ñ¹ËõÓÐÒ»µãÀí½â£¬¹ÊдÏÂÁô×ÅÒÔºó²Î¿¼¡£
ΪÁË´¦ÀíÖÐÎÄÂÒÂëÎÊÌ⣬ʹÓÃant.jar°ü¡£
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ