Znn3bq.jpeg
±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 2528  |  »Ø¸´: 26
¡¾½±Àø¡¿ ±¾Ìû±»ÆÀ¼Û21´Î£¬×÷ÕßÎÂܰԲÃÎÔö¼Ó½ð±Ò 16 ¸ö

ÎÂܰԲÃÎ

ľ³æ (ÖªÃû×÷¼Ò)


[×ÊÔ´] JAVAÈÏÖ¤¿¼ÊÔÄ£ÄâÌâ

QUESTION 1
Given:
1.public class TestString 1{
2.public static void main(String[]args){
3.String str="420";
4.str+=42;
5.System.out.print(str);
6.}
7.}
What is the output?
A.42
B.420
C.462
D.42042
E.Compilation fails.
F.An exception is thrown at runtime.
Answer
ÏÂÔØµÄ³æÓÑÃÇÇë»Ø¸´Ò»ÏÂÌû×ÓŶ£¬Ð»Ð»ÄãµÄ¹Ø×¢
»Ø¸´´ËÂ¥

» ±¾Ìû¸½¼þ×ÊÔ´Áбí

  • »¶Ó­¼à¶½ºÍ·´À¡£ºÐ¡Ä¾³æ½öÌṩ½»Á÷ƽ̨£¬²»¶Ô¸ÃÄÚÈݸºÔð¡£
    ±¾ÄÚÈÝÓÉÓû§×ÔÖ÷·¢²¼£¬Èç¹ûÆäÄÚÈÝÉæ¼°µ½ÖªÊ¶²úȨÎÊÌ⣬ÆäÔðÈÎÔÚÓÚÓû§±¾ÈË£¬Èç¶Ô°æÈ¨ÓÐÒìÒ飬ÇëÁªÏµÓÊÏ䣺xiaomuchong@tal.com
  • ¸½¼þ 1 : JAVAÈÏÖ¤¿¼ÊÔÄ£ÄâÌâ.pdf
  • 2012-01-06 10:19:10, 1.57 M

» ÊÕ¼±¾ÌûµÄÌÔÌûר¼­ÍƼö

ѧϰ ITѧϰ×ÊÁÏ

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
»ØÌûÖ§³Ö ( ÏÔʾ֧³Ö¶È×î¸ßµÄǰ 50 Ãû )

awdz424

Òø³æ (³õÈëÎÄ̳)


¡ï Ò»ÐǼ¶,Ò»°ã

so easy£¬´ð°¸ÊÇD£¬´ð¶ÔÁ˰ɣ¿
2Â¥2012-01-07 09:12:38
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

402323992

ľ³æ (СÓÐÃûÆø)


¡ï¡ï¡ï¡ï¡ï ÎåÐǼ¶,ÓÅÐãÍÆ¼ö

лл£¡
6Â¥2012-06-01 19:48:03
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

boat_zh

гæ (³õÈëÎÄ̳)


¡ï¡ï¡ï¡ï¡ï ÎåÐǼ¶,ÓÅÐãÍÆ¼ö

ûǮÏÂÔØÁË.
9Â¥2012-12-04 22:02:00
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hulun_123

Òø³æ (СÓÐÃûÆø)


ÒýÓûØÌû:
2Â¥: Originally posted by awdz424 at 2012-01-07 09:12:38
so easy£¬´ð°¸ÊÇD£¬´ð¶ÔÁ˰ɣ¿

¶ÔµÄ
11Â¥2013-09-06 12:54:08
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zwjcxj

гæ (СÓÐÃûÆø)


´ð°¸ÊÇD
12Â¥2013-11-19 21:12:13
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

¾øÊÀºÃ½£

Òø³æ (³õÈëÎÄ̳)


¡ï¡ï¡ï¡ï¡ï ÎåÐǼ¶,ÓÅÐãÍÆ¼ö

²»´í~£¡
18Â¥2014-07-16 15:46:58
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

°×²ËÀÖ

гæ (³õÈëÎÄ̳)


¡ï¡ï¡ï¡ï¡ï ÎåÐǼ¶,ÓÅÐãÍÆ¼ö

´ð°¸ÊÇ£ºD
21Â¥2015-05-28 15:12:43
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

18406505534

Í­³æ (³õÈëÎÄ̳)


¡ï¡ï¡ï ÈýÐǼ¶,Ö§³Ö¹ÄÀø

ÔÞÔÞ
24Â¥2015-12-21 16:36:06
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
¼òµ¥»Ø¸´
coarse3Â¥
2012-01-07 14:48   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
may125z4Â¥
2012-01-07 15:38   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
2012-01-08 00:09   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
yukunthl7Â¥
2012-10-21 13:09   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
caiking8Â¥
2012-11-20 08:08   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
hulun_12310Â¥
2013-09-06 12:48   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
yangweiharry13Â¥
2013-12-02 12:18   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
snowflylee14Â¥
2013-12-27 21:40   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
ʩ·ÓÈ15Â¥
2014-01-20 11:16   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
fabuer16Â¥
2014-02-21 22:19   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
fabuer17Â¥
2014-03-13 12:25   »Ø¸´  
¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
dong510319Â¥
2014-08-17 22:55   »Ø¸´  
ÈýÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
090605011320Â¥
2014-08-20 19:41   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
°×²ËÀÖ22Â¥
2015-05-28 15:14   »Ø¸´  
¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
yubumoquan23Â¥
2015-05-30 16:10   »Ø¸´  
ÎåÐÇºÃÆÀ  ¸Ðл·ÖÏí
ysj.qq52025Â¥
2015-12-27 16:53   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
tylw126Â¥
2015-12-27 22:47   »Ø¸´  
hj7254327Â¥
2016-01-25 14:45   »Ø¸´  
ÎåÐÇºÃÆÀ  ¶¥Ò»Ï£¬¸Ðл·ÖÏí£¡
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ ÎÂܰԲÃÎ µÄÖ÷Ìâ¸üÐÂ
¡î ÎÞÐǼ¶ ¡ï Ò»ÐǼ¶ ¡ï¡ï¡ï ÈýÐǼ¶ ¡ï¡ï¡ï¡ï¡ï ÎåÐǼ¶
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 293µ÷¼Á +20 yj1221 2026-04-08 21/1050 2026-04-08 22:37 by Öí»á·É
[¿¼ÑÐ] Ò»Ö¾Ô¸ÏôóÉúÎïѧ332Çóµ÷¼Á +5 ³Ø³Ø³Ø³Ø³Ø³Ø 2026-04-08 5/250 2026-04-08 21:23 by zhyzzh
[¿¼ÑÐ] ר˶310Çóµ÷¼Á +7 ÀÌÀÌÎÒ¡­. 2026-04-04 8/400 2026-04-08 20:24 by yutian743
[¿¼ÑÐ] »·¾³×¨Ë¶µ÷¼Á +15 »á˵»°µÄÖâ×Ó 2026-04-06 15/750 2026-04-08 18:56 by »·»¯²Ä-СÉú
[¿¼ÑÐ] ²ÄÁÏ¿ÆÑ§Ó빤³Ì320Çóµ÷¼Á£¬080500 +12 »Æ¹ÏζÊíÆ¬ 2026-04-06 12/600 2026-04-08 16:26 by luoyongfeng
[¿¼ÑÐ] Çóµ÷¼Á£¬262»úеר˶ +4 àÅyyl 2026-04-08 4/200 2026-04-08 16:12 by Ò»Ö»ºÃ¹û×Ó?
[¿¼ÑÐ] 266Çóµ÷¼Á +18 ÑôÑôÍÛÈû 2026-04-07 18/900 2026-04-08 12:59 by grayjzr
[¿¼ÑÐ] 353Çóµ÷¼Á +6 Çç¿ÕÍòÀïair 2026-04-07 6/300 2026-04-08 10:06 by ²»³Ôô~µÄ؈
[¿¼²©] É격 +8 IQwQl 2026-04-04 8/400 2026-04-08 09:43 by 0608104024
[¿¼ÑÐ] 338Çóµ÷¼Á +8 wxygxsaaaaa 2026-04-06 8/400 2026-04-08 06:58 by Î޼ʵIJÝÔ­
[¿¼ÑÐ] 372Çóµ÷¼Á +4 jjÓ¿77 2026-04-02 4/200 2026-04-07 09:31 by °×ÔÆ¶ä¶ä·É
[¿¼ÑÐ] 301Çóµ÷¼Á +6 ϸ°ûÏà¹Øµ°°× 2026-04-02 10/500 2026-04-06 08:34 by jp9609
[¿¼ÑÐ] 377Çóµ÷¼Á +6 by.ovo 2026-04-05 6/300 2026-04-05 22:18 by dongzh2009
[¿¼ÑÐ] 358Çóµ÷¼Á +7 Çïgk 2026-04-04 7/350 2026-04-05 13:29 by huangmoli
[¿¼ÑÐ] ¹¤¿Æ277·ÖÇóµ÷¼Á²ÄÁÏ +8 ÉÏÁËÉÏÁËÉÏŶ 2026-04-05 9/450 2026-04-05 13:05 by wwytracy
[¿¼ÑÐ] ²ÄÁÏÓ뻯¹¤306·ÖÕÒµ÷¼Á +12 ²×º£ÇáÖÛe 2026-04-03 13/650 2026-04-04 23:45 by lqwchd
[¿¼ÑÐ] ¿¼Ñе÷¼Á +5 ËÄ´¨ÍõÌÎ 2026-04-04 5/250 2026-04-04 22:18 by à£à£à£0119
[¿¼ÑÐ] ±¾¿Æ211£¬×¨Òµ085404£¬293·ÖÇëÇóµ÷¼Á +5 Á«²Ë¾ÍÊÇź°É 2026-04-04 5/250 2026-04-04 14:08 by ÕâÊÇÒ»¸öÎÞÁĵÄê
[¿¼ÑÐ] 266Çóµ÷¼Á +8 ѧԱ97LZgn 2026-04-03 8/400 2026-04-04 09:02 by 20021109
[¿¼ÑÐ] 260Çóµ÷¼Á +3 ÖìÜÆÁÕ 2026-04-02 3/150 2026-04-03 08:44 by yulian1987
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û