Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Effective Java: Item 1

Static Factory Methods
Four Advantages:
1) have names
2) not required to create a new object each time they are invoked
3) return an object of any subtype of their return type
4) reduce the verbosity of creating parameterized type instances.(for example: newInstance() method)


Ïà¹ØÎĵµ£º

java IO learning

javaѧϰ:³¹µ×Ã÷°×JavaµÄIOϵͳ
ÎÄÕÂÀ´Ô´£º»¥ÁªÍø
Ò»£® InputºÍOutput
1. stream´ú±íµÄÊÇÈκÎÓÐÄÜÁ¦²ú³öÊý¾ÝµÄÊý¾ÝÔ´£¬»òÊÇÈκÎÓÐÄÜÁ¦½ÓÊÕÊý¾ÝµÄ½ÓÊÕÔ´¡£ÔÚJavaµÄIOÖУ¬ËùÓеÄstream£¨°üÀ¨InputºÍOut stream£©¶¼°üÀ¨Á½ÖÖÀàÐÍ£º
1.1 ÒÔ×Ö½ÚΪµ¼ÏòµÄstream
ÒÔ×Ö½ÚΪµ¼ÏòµÄstream£¬±íʾÒÔ×Ö½ÚΪµ¥Î»´ÓstreamÖжÁÈ¡»òÍùst ......

try...catch...finally java String µÄÓ÷¨

javaÖÐÒì³£µÄÁ½ÖÖ´¦Àí£º
1.try...catch....finally ´æÔÚÓ뵱ǰµÄÒì³£´¦ÀíÀ࣬±íʾµ±Ç°ÓÉ×Ô¼ºµÄ·½·¨À´´¦Àí
2.Throw ½«µ±Ç°Òì³£Å׳ö £¬½»ÓÉÉϼ¶À´´¦Àí¡£
 try...catch....finallyµÄ´¦ÀíÁ÷³Ì£º
   ½«³öÏÖÒì³£µÄÓï¾ä·ÅÔÚtryÖУ¬Ò»¶Î´ËÓï¾ä³ö´í£¬³ÌÐò»áÔÝÍ£Ö´ÐУ¬Òì³£´¦Àí»úÖÆ¾ÍÈ¥½Ó¹Ü³ÌÐò£¬
   ½ ......

ÔÚÉÐѧÌÃѧÍêjavaÈÃÎÒÇáËɸ㶨¹¤×÷

ÔÚÉÐѧÌÃѧÍêjavaÈÃÎÒÇáËɸ㶨¹¤×÷
¡¾Ñ§Ô±¹ÊÊ¡¿À´×ÔÉÐѧÌÃÕæÈËÕæÊ                                       &n ......

javaÖÐ×î³£Óõļ¯ºÏ Ïêϸ½²½â


/**ÎÒÕâÖ»½² ListArray ,ListedList,HashMap
//ListArray ËüÊÇÒ»¸öʵÏÖÁËList½Ó¿ÚµÄÀà ,List¼Ì³Ðcollection½Ó¿Ú
//µ÷ÓÃimport java.util.ArrayList°ü,(ÕâÀïÁ½ÕßÈÎÑ¡ÆäÒ») ÍêÕûµÄjava¼¯ºÏ´æ·ÅÔÚjava.util°üÖÐ
//ÌØµã:
1>.ListÊÇÓÐÐòµÄ¼¯ºÏ
2>.List¿ÉÒÔÓÐÖØ¸´µÄÔªËØÖµ
3>.ʹÓÃË÷ÒýÀ´¾«È·µÄ·ÃÎÊÔªËØÖµ,
4& ......

JavaỊ̈߳ºÏ̵߳ĵ÷¶È ÓÅÏȼ¶

ÓëÏß³ÌÐÝÃßÀàËÆ£¬Ï̵߳ÄÓÅÏȼ¶ÈÔÈ»ÎÞ·¨±£ÕÏÏ̵߳ÄÖ´ÐдÎÐò¡£Ö»²»¹ý£¬ÓÅÏȼ¶¸ßµÄÏ̻߳ñÈ¡CPU×ÊÔ´µÄ¸ÅÂʽϴó£¬ÓÅÏȼ¶µÍµÄ²¢·Çû»ú»áÖ´ÐС£
 
Ï̵߳ÄÓÅÏȼ¶ÓÃ1-10Ö®¼äµÄÕûÊý±íʾ£¬ÊýÖµÔ½´óÓÅÏȼ¶Ô½¸ß£¬Ä¬ÈϵÄÓÅÏȼ¶Îª5¡£
 
ÔÚÒ»¸öÏß³ÌÖпªÆôÁíÍâÒ»¸öÐÂỊ̈߳¬ÔòпªÏ̳߳ÆÎª¸ÃÏ̵߳Ä×ÓỊ̈߳¬×ÓÏ̳߳õʼÓÅÏȼ¶Ó븸 ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ