javaÖеķâ×°Àà
·â×°ÀàÒ²½Ð°ü×°À࣬ÊÇÕë¶Ô°ËÖÖ»ù±¾¶¨ÒåÏàÓ¦µÄÒýÓÃÀàÐÍ¡£
»ù±¾Êý¾ÝÀàÐÍ ·â×°Àà
boolean Boolean
byte Byte
short Short
int Integer
long Long
char Character
float Float
double Double
·â×°ÀàÓ÷¨Àý×Ó1£º
int i = 500;
Integer t = new Integer(i); //°Ñiת»»³ÉIntegerÀàÐ͵ĶÔÏót
int j = t.intValue(); // °ÑIntegetÀàÐ͵ĶÔÏótת»»³ÉÕûÐÎ j£¬j = 500
String s = t.toString(); // s = “500”£¬IntegerÄܵ÷ÓÃtoString·½·¨£¬ÒòΪIntegerµÄ¸¸ÀàÊÇObjectÀà¡£t±ä³ÉÁËtoStringÀàÐ͵ĶÔÏós.
String s1 = Integer.toString(314); // s1= “314“,Õâ¸öÊÇÖØÔØµÄ·½·¨¡£Õâ¸ötoString±»ÖØÐ´ÁË£¬¶øÇÒÊǾ²Ì¬µÄ£¬Ò
Ïà¹ØÎĵµ£º
Êý×éÊôÒýÓÃÀàÐÍ£¬Êý×éÐÍÊý¾ÝÊǶÔÏó(object)£¬Êý×éÖеÄÿ¸öÔªËØÏ൱ÓڸöÔÏóµÄ³ÉÔ±±äÁ¿
Êý×éÖеÄÔªËØ¿ÉÒÔÊÇÈκÎÊý¾ÝÀàÐÍ£¬°üÀ¨»ù±¾ÀàÐͺÍÒýÓÃÀàÐÍ
¼ÇסÊý×éÊ×ÏÈ·ÖÅä¿Õ¼äÔÙ¸³Öµ£¡
¶¯Ì¬³õʼ»¯£º¾ÍÊÇÏÈ·ÖÅä¿Õ¼äÔÙ¸³³õÖµ£»
¾²Ì¬³õʼ»¯£º¶¨ÒåÊý×éͬʱ¾ÍΪÊý×éÔªËØ·ÖÅä¿Õ¼ä²¢¸³Öµ¡£
1һάÊý×éµÄÉùÃ÷
һάÊý×éµÄÉùÃ÷£ºtype va ......
==²Ù×÷·ûÓëequals·½·¨µÄÇø±ð£º
==ÊÇÒýÓÃÀàÐͱȽÏÒýÓÃ(Ò²¾ÍÊDZȽÏÄÚÈݺ͵ØÖ·)£»»ù±¾ÀàÐͱȽÏÖµ£»
equals()·½·¨Ö»ÄܱȽÏÒýÓÃÀàÐÍ£¬"=="¿ÉÒԱȽÏÒýÓÃÀàÐͼ°»ù±¾ÀàÐÍ£»
ÌØÀý£ºµ±ÓÃequals()·½·¨½øÐбȽÏʱ£¬¶ÔÀàFile¡¢String¡¢Date¼°·â×°ÀࣨWrapper°ü×° ......
toString() ·½·¨£º
toString()·½·¨ÔÚObjectÀàÖж¨Ò壬Æä·µ»ØÖµÊÇStringÀàÐÍ£¬ÃèÊöµ±Ç°¶ÔÏóµÄÓйØÐÅÏ¢
ÔÚ½øÐÐStringÓëÆäËüÀàÐÍÊý¾ÝµÄÁ¬½Ó²Ù×÷ʱ£¬×Ô¶¯µ÷ÓÃtoString()·½·¨
¿ÉÒÔ¸ù¾ÝÐèÒªÔÚÓû§×Ô¶¨ÒåÀàÐÍÖÐÖØÐ´toString()·½·¨
»ù±¾ÀàÐÍÊý¾Ý× ......
java¾µäÊé¼®»ã×Ü£¨²¿·Ö£©
Ò»¡¢ÈëÃÅ
¡¶Java 2´ÓÈëÃŵ½¾«Í¨¡·£ ÍÆ¼ö
¡¶Thinking in Java¡·£ Ç¿ÁÒÍÆ¼ö*
O’reillyµÄJava±à³Ì»ù´¡ÏµÁÐ £ ²Î¿¼*
¶þ¡¢½ø½×
¡¶Java Cook Book¡·£ ·Ç³£ÍƼö* £¨°üº¬ÁËJava±à³ÌµÄTips£¬Êʺϵ± ......
×÷Îı¾±à¼Æ÷µÄʱºò£¬³·Ïú(undo)¡¢»Ö¸´(redo)ÊDZز»¿ÉÉÙµÄÁ½¸ö¹¦ÄÜ¡£ÊµÏÖÕâ¸ö¹¦ÄÜ£¬ÒªÓõ½javax.swing.undo°üÖеÄUndoManagerÀà¡£
UndoManagerÀàÓÐÈçϳ£Ó÷½·¨£º
boolean canUndo() ——ÅжÏÄÜ·ñ½øÐг·Ïû²Ù×÷£¬¿ÉÒÔÔò·µ»Øtrue¡£
boolean canRedo() ——ÅжÏÄÜ·ñ½øÐлָ´²Ù×÷£¬¿ÉÒÔÔò·µ ......