java BufferedReaderºÍInputStreamReaderµÄÇø±ð
BufferedReader:
Read text from a character-input
stream, buffering characters so as to provide for the
efficient reading of characters, arrays, and lines.
InputStreamReader:
An InputStreamReader is a bridge from byte streams to
character streams: It reads bytes and decodes them
into characters using a specified charset.
Ïà¹ØÎĵµ£º
³ÌÐòÖ´ÐÐʱ»á˳Ðò¾¹ýloading¡¢linking¡¢initializationÈý¸ö²½Öè
1. loading£º²éÕÒÀà»ò½Ó¿ÚµÄ¶þ½øÖÆÎļþ
2. linking£º×°ÈëÀà»ò½Ó¿ÚµÄ¶þ½øÖÆÎļþ£¬ºÏΪJVMµÄÔËÐÐ״̬£¬Ê¹Æä¿ÉÒÔ±»Ö´ÐС£´Ë¹ý³Ì°üÀ¨Èý¸ö×Ó¹ý³Ì£ºverification, preparation, and
resolution of symbolic references
3. initialization£º ......
´´½¨Ò»¸öÀàµÄʵÀýʱ£¬
1.»áΪËüÒÔ¼°ËüµÄËùÓи¸ÀàµÄʵÀý±äÁ¿·ÖÅäÄÚ´æ¿Õ¼ä£¬Èç¹û·ÖÅä¿Õ¼ä³É¹¦£¬ÔòËùÓÐʵÀý±äÁ¿¶¼»á³õʼ»¯ÎªÄ¬ÈÏÖµ0¡¢false¡¢null
2.»áµÝ¹éµ÷Óø¸¹¹Ô캯Êý£¬µ«ÊÇÔݲ»Ö´Ðй¹Ô캯ÊýµÄÓï¾ä£»
3.¶Ô¸Ã¸¸¹¹Ô캯Êý¶ÔÓ¦µÄÀàµÄʵÀý±äÁ¿¸³Öµ
4.Ö´Ðи¸¹¹Ô캯ÊýµÄÆäËûÓï¾ä
5.¶ÔÓÚ×ÓÀִ࣬ÐÐ2-4²½Öè ......
¼òÑÔÖ®,Èç¹û²»ÓõÚÈý·½ÌṩµÄ½Ó¿Ú
ÄÇ×îºÃµÄ½â¾ö·½°¸Ó¦¸ÃÊǵ±SESSION½¨Á¢Ê±sessionCreated(),ÔÚ·ÃÎÊ×ÜÊýºÍµ±Ç°ÔÚÏßÈËÊýÉÏ+1
µ±SESSIONÏú»ÙʱsessionDistroyed(),ÔÚÏßÈËÊý-1
ºËÐÄ·½·¨ÊÇÀûÓÃListener¼àÌýµÄ¸÷ÖÖ½Ó¿Ú
ÎÒ°Ñ´úÂë(Ö÷Òª²¿·Ö)ÌùÔÚÏÂÃæ
´Ë¶Î´úÂëÎÒÇ××ÔʹÓùý,ûÓÐÎÊÌâ
µ«ÒòΪ¼Ì³ÐÁ˽ӿÚ,ÓÐЩδʹÓõķ½·¨Ò²Òª² ......
¹Ø¼ü×Ö: byte String
ÎÊÌâ1£ºjavaÖÐûÓÐʵÏÖÕâÖÖ“byte a = 0xB2 --> String b = “B2””ת»»µÄ¼òµ¥ÊµÏÖÐèÒª×Ô¼ºÊµÏÖ¡£
´ð£º×Ô¼º±àдµÄת»»º¯Êý£¬Ë¼Â·½«byteµÄ¸ßµÍ4λ·Ö¿ª£¬·Ö±ðת»»Îª¶ÔÓ¦µÄ×Ö·ûÈ»ºóºÏ³É·µ»ØµÄ×Ö·û´®¡£
java ´úÂë
public static String byteToString(byte b) { ......
±¾ÎĽéÉÜJava SwingÖеÄJTreeÄ£ÐÍ£¬½éÉÜÈçºÎ´´½¨¡¢Ð޸ġ¢±éÀú£¬ÉèÖÃÊ÷¡£²Î¿¼Core Java2Ïà¹ØÕ½ڼ°ÆäÔ´´úÂë¡£
SwingÊ÷ʹÓÃÈËÃÇËùÊìϤµÄÎļþ¼ÐºÍÊ÷ҶͼÀ´ÏÔʾ·Ö²ãµÄÊý¾Ý¡£Ê÷Óɽڵã×é³É£¬½Úµã¿ÉÒÔÊÇÎļþ¼Ð£¬Ò²¿ÉÒÔÊÇÊ÷Ò¶¡£Îļþ¼Ð¿ÉÒÔÓÐ×ӽڵ㣬³ý¸ù½ÚµãÖ®ÍâµÄËùÓнڵ㶼ֻÓÐÒ»¸ö¸¸½Úµã¡£¿ÕµÄÎļþ¼ÐÓëÊ÷Ò¶µÄ²»Í¬Ö®´¦¾ÍÔÚÓÚËüÔÊ ......