ѧϰJAVAʱ¼äÈÕÆÚÀà×ܽ᡾z¡¿
Ò»¡¢PythonÖеÄÎļþ¹ÜÀí
Îļþ¹ÜÀíÊǺܶàÓ¦ÓóÌÐòµÄ»ù±¾¹¦ÄܺÍÖØÒª×é³É²¿·Ö¡£Python¿ÉÒÔʹÎļþ¹ÜÀí¼«Æä¼òµ¥£¬ÌرðÊÇºÍÆäËüÓïÑÔÏà¶Ô±È¡£
ÒÔÏ£¬Peyton McCullough½²½âÁËÎļþ¹ÜÀí»ù´¡¡£
½éÉÜ
ÄãÍæ¹ýµÄÓÎϷʹÓÃÎļþÀ´±£´æ´æµµ£»ÄãÏµĶ©µ¥±£´æÔÚÎļþÖУ»ºÜÃ÷ÏÔ£¬ÄãÔçÉÏдµÄ±¨¸æÒ²±£´æÔÚÎļþÖС£
¼¸ºõÒÔÈκÎÓïÑÔ±àдµÄÖÚ¶àÓ¦ÓóÌÐòÖУ¬Îļþ¹ÜÀíÊǺÜÖØÒªµÄÒ»²¿·Ö¡£Pythonµ±È»Ò²²»ÀýÍâ¡£ÔÚÕâÆªÎÄÕÂÖУ¬ÎÒÃǽ«Ì½¾¿ÈçºÎʹÓÃһЩģ¿éÀ´²Ù×÷Îļþ¡£ÎÒÃÇ»áÍê³É¶ÁÎļþ£¬Ð´Îļþ£¬Ôö¼ÓÎļþÄÚÈݵIJÙ×÷£¬»¹ÓÐһЩÁíÀàµÄÓ÷¨¡£OK£¬ÈÃÎÒÃÇ¿ªÊ¼°É¡£
¶ÁдÎļþ
×î»ù±¾µÄÎļþ²Ù×÷µ±È»¾ÍÊÇÔÚÎļþÖжÁдÊý¾Ý¡£ÕâÒ²ÊǺÜÈÝÒ×ÕÆÎյġ£ÏÖÔÚ´ò¿ªÒ»¸öÎļþÒÔ½øÐÐд²Ù×÷£º
fileHandle = open ( 'test.txt', 'w' )‘w'ÊÇÖ¸Îļþ½«±»Ð´ÈëÊý¾Ý£¬Óï¾äµÄÆäËü²¿·ÖºÜºÃÀí½â¡£ÏÂÒ»²½¾ÍÊǽ«Êý¾ÝдÈëÎļþ£º
fileHandle.write ( 'This is a test.\nReally, it is.' )Õâ¸öÓï¾ä½«“This is a test.”дÈëÎļþµÄµÚÒ»ÐУ¬“Really, it is.”дÈëÎļþµÄµÚ¶þÐС£×îºó£¬ÎÒÃÇÐèÒª×öÇåÀí¹¤×÷£¬²¢ÇҹرÕÎļþ£º
fileHandle.close()ÕýÈçÄãËù¼û£¬ÔÚPythonµÄÃæÏò¶ÔÏó»úÖÆÏ£¬Õâȷʵ·Ç³£¼òµ¥¡£ÐèҪעÒâµÄÊÇ£¬µ±ÄãÔÙ´ÎʹÓÓw”·½Ê½ÔÚÎļþÖÐдÊý¾Ý£¬ËùÓÐÔÀ´µÄÄÚÈݶ¼»á±»É¾³ý¡£Èç¹ûÏë±£ÁôÔÀ´µÄÄÚÈÝ£¬¿ÉÒÔʹÓÓa”·½Ê½ÔÚÎļþÖнáβ¸½¼ÓÊý¾Ý£º
fileHandle = open ( 'test.txt', 'a' )
fileHandle.write ( '\n\nBottom line.' )
fileHandle.close()È»ºó£¬ÎÒÃǶÁÈ¡test.txt£¬²¢½«ÄÚÈÝÏÔʾ³öÀ´£º
fileHandle = open ( 'test.txt' )
print fileHandle.read()
fileHandle.close()ÒÔÉÏÓï¾ä½«¶ÁÈ¡Õû¸öÎļþ²¢ÏÔʾÆäÖеÄÊý¾Ý¡£ÎÒÃÇÒ²¿ÉÒÔ¶ÁÈ¡ÎļþÖеÄÒ»ÐУº
fileHandle = open ( 'test.txt' )
print fileHandle.readline() # "This is a test."
fileHandle.close()
ͬʱ£¬Ò²¿ÉÒÔ½«ÎļþÄÚÈݱ£´æµ½Ò»¸ölistÖУº
fileHandle = open ( 'test.txt' )
fileList = fileHandle.readlines()
for fileLine in fileList:
print '>>', fileLine
fileHandle.close()PythonÔÚ¶Áȡһ¸öÎļþʱ£¬»á¼ÇסÆäÔÚÎļþÖеÄλÖã¬ÈçÏÂËùʾ£º
fileHandle = open ( 'test.txt' )
garbage = fileHandle.readline()
fileHandle.readline() # "Really, it is."fileHandle.close()¿ÉÒÔ¿´µ½£¬Ö»ÓеڶþÐÐÏÔʾ³öÀ´¡£È»¶ø£¬
Ïà¹ØÎĵµ£º
Ö®ËùÒÔдÕâÆª²©¿Í£¬ÊÇÒòΪǰ¼¸Ìì²ÅÅöµ½ÁËÕâôһ¸öÎÊÌ⣬ÒÔǰ»¹²»ÖªµÀmysqlÓÐÕâôһ¸öÎÊÌâ¡£
ÎÒÃǵÄϵͳʹÓÃÁËstruts+hibernate£¬Êý¾Ý¿âʹÓõÄÊÇmysql£¬×Ö·û¼¯Í³Ò»Îªutf-8¡£
±¾À´ÒѾÍê³ÉÁË£¬µ«ÊÇϵͳʹÓõÄʱºò£¬·¢ÏÖ²é³öÀ´µÄÈËÃûûÓÐ˳Ðò£¬±¾À´ÒÔΪºÜ¼òµ¥£¬ÔÚ²éѯµÄʱºò£¬Ö¸¶¨°´ÕÕnameÅÅÐò¾Í¿ÉÒÔÁË£¬Æñ֪ʵ¼ÊÒ»×ö²Å·¢Ï ......
Ïß³Ì Thread setDaemon ·½·¨
2009Äê07ÔÂ24ÈÕ ÐÇÆÚÎå 14:37
Thread setDaemon ·½·¨
import java.io.IOException;
/*
* ÊØ»¤Ïß³ÌÔÚûÓÐÓû§Ï߳̿ɷþÎñʱ×Ô¶¯À뿪
* ÔÚJavaÖбȽÏÌØÊâµÄÏß³ÌÊDZ»³ÆÎªÊØ»¤£¨Daemon£©Ï̵߳ĵͼ¶±ðÏ̡߳£
* Õâ¸ö ......
java exception ½â¾ö·½°¸ - ÎÒµÄÒì³£Íø|Òì³£|exception|myexception 831 - ActionMessages 832 - could not instantiate id generator 833 - javax.servlet.jsp.JspException 834 - javax.naming.NoInitialContextException 835 - net.sf.hibernate.HibernateException 836 - org.hibernate.exception.GenericJDBCExceptio ......
javaÖÐnullµÄ¸ÅÄî:javaÖУ¬null±íʾÀà»ò±äÁ¿Êǿգ¬²»´ú±íÈκζÔÏó»òʵÀý£¬¿ÉÒÔ½«null¸³¸øÒýÓÃÀàÐͱäÁ¿£¬µ«²»¿ÉÒÔ½«null¸³¸ø»ù±¾ÀàÐͱäÁ¿¡£Êý¾Ý¿âÖÐNULLµÄ¸ÅÄî:Êý¾Ý¿âÖУ¬null±íʾδÌîд¡¢Î´Öª¡¢²»¿ÉÓõĸÅÄºÍjava²»Í¬µÄÊÇÊý¾Ý¿âÖпÉÒÔ½«null¸³¸øÈκÎÊý¾ÝÀàÐÍ¡£ÕâÑùÒ»À´£¬ÎÒÃÇ´ÓÊý¾Ý¿âÖжÁÈ¡×ֶεÄÖµºó£¬ÔÚjava³ÌÐò ......
³£Á¿
JavaÖеij£Á¿ÖµÊÇÓÃÎÄ×Ö´®±íʾµÄ,ËüÇø·ÖΪ²»Í¬µÄÀàÐÍ,ÈçÕûÐͳ£Á¿123,ʵÐͳ£Á¿1.23,×Ö·û³£Á¿‘a’,²¼¶û³£Á¿true¡¢falseÒÔ¼°×Ö·û´®³£Á¿"This is a constant string."¡£ÓëC¡¢C++²»Í¬,JavaÖв»ÄÜͨ¹ý#defineÃüÁî°ÑÒ»¸ö±êʶ·û¶¨ÒåΪ³£Á¿,¶øÊÇÓùؼü×ÖfinalÀ´ÊµÏÖ,Èç
final double PI=3.14159( ÓÐ ......