鈼巉orm閲屾彁浜ょ殑錛屼緥濡?lt;input type錛?text" ....>錛屽鏋渧alue 涓虹┖錛岋紝閭ｄ箞keyword="";
鈼巙rl鍚庣紑浼犻掔殑錛屽鏋滄病鏈夎繖涓弬鏁?keyword",,鍒?nbsp; keyword涓簄ull
璇曞浘瀵逛竴涓猲ull鍙橀噺錛堝煎彉閲忥紝瀵硅薄錛夊仛鎿嶄綔錛岋紝渚嬪keyword.equals("a")
浼氬紩鍙戯紝錛孨ullPointerException
overview of i/o Streams
瑕佸緱鍒頒俊鎭紝紼嬪簭鍦ㄦ簮鏁版嵁涓婃墦寮涓涓祦錛堟枃浠訛紝鍐呭瓨錛宻ocket錛夛紝鐒跺悗欏哄簭璇誨叆鏁版嵁錛屽涓嬪浘鎵紺猴細
鍚屾牱錛岀▼搴忓彲浠ラ氳繃鎵撳紑涓涓枃浠舵祦鍚戠洰鏍囧彂閫佷俊鎭細
鏃犺鏁版嵁鏉ヨ嚜鍝噷鎴栬呭悜鍝彂閫侊紝鏃犺鏄綍縐嶇被鍨嬶紝璇誨啓鏁版嵁鐨勮鍒欐槸涓鏍風(fēng)殑錛?BR>
Reading
Writing
open a stream
while more information
read information
close the stream
open a stream
while more information
write information
close the stream
java.io.*鍖?鏂囦歡嫻佺被鐨勯泦鍚堬紝鏀寔榪欎簺璇誨啓鐨勮鍒欙紝銆?浣跨敤榪欎簺綾伙紝紼嬪簭闇瑕乮mport java.io.*銆傛枃浠舵祦綾誨彲浠ュ垎涓轟袱涓被灞傛錛屼互鎵澶勭悊鐨勬暟鎹被鍨嬶紙瀛楃鎴栧瓧鑺傦級涓哄熀紜銆?BR>
瀛楃嫻?BR>Reader鍜學(xué)riter鏄痡ava.io.鍖呴噷闈㈠瓧絎︽祦鐨勪袱涓娊璞＄被銆?Reader綾繪彁渚涗簡readers--stream 璇誨彇16-bit瀛楃鐨凙PI鍜岄儴鍒嗗疄鐜幫紝錛學(xué)riter鎻愪緵浜唚riters--streams 鍐欏叆16-bit瀛楃鐨刟pi鍜岄儴鍒嗗疄鐜般俁eader鍜學(xué)riter鐨勫瓙綾誨垎涓轟袱綾伙細浠巇ata sink涓鍐欑殑綾伙紙榛戣壊錛夛紝鍜屾暟鎹鐞嗙被錛堢櫧鑹詫級
澶ч儴鍒嗗簲鐢ㄧ▼搴忓簲璇ョ敤reader鍜寃riter鏉ヨ鍐欐枃鏈俊鎭傚師鍥犳槸浠栦滑鍙互澶勭悊Unicode涓瓧絎﹂泦
鎬葷殑浠諱綍瀛楃錛岃屽瓧鑺傛祦鍙兘澶勭悊 iso-Latin-1 8-bit瀛楄妭銆?nbsp;
瀛楄妭嫻?BR> 涓轟簡璇誨啓8-bit瀛楄妭錛岀▼搴忓簲璇ヤ嬌鐢ㄥ瓧鑺傛祦錛孖nputStream鍜孫utputStream鐨勫瓙綾伙紝InputStream鍜孫utputStream鎻愪緵浜唅nput streams(streams that read 8-bit bytes)錛宱utput streams(streams that write 8-bit bytes)鐨刟pi鍜岄儴鍒嗗疄鐜幫紝榪欎簺嫻佸吀鍨嬬殑鐢ㄦ潵璇誨啓浜岃繘鍒舵暟鎹紝鍍忓浘鍍忥紝澹伴煶銆?鍏朵腑瀛楄妭嫻佺殑涓や釜綾伙紝ObjectInputStream,ObjectOutputStream鐢ㄤ簬瀵硅薄鐨勫簭鍒楀寲錛孴hese classes are covered in Object Serialization
灝卞儚Reader鍜學(xué)riter綾伙紝錛孖nputStream鍜孫utputStream鐨勫瓙綾諱篃鍒嗕負涓ょ被錛屾暟鎹帴鏀舵祦錛堥槾褰憋級鍜屾暟鎹鐞嗘祦
鐞嗚В i/o 瓚呯被
Reader鍜孖nputStream瀹氫箟浜嗙浉浼肩殑APIs,,鍙槸閽堝鐨刣ata type涓嶅悓銆備緥濡傦紝Reader 鍖呭惈浜嗕互涓嬭鍙栧瓧絎﹀拰瀛楃鏁扮粍鐨勬柟娉曪細
int read()
int read(char cbuf[])
int read(char cbuf[], int offset,int length)
InputStream 瀹氫箟浜嗙浉鍚岀殑鏂規(guī)硶錛岀敤鏉ヨ鍙栧瓧鑺傚拰瀛楄妭鏁扮粍
int read()
int read(char cbuf[])
int read(char cbuf[], int offset,int length)
鍚屾牱鐨勶紝Reader鍜孖nputStream鎻愪緵涓浜涚浉浼肩殑鏂規(guī)硶錛屼緥濡傚湪嫻佷腑浣滄爣璁幫紝skipping input錛岄噸緗綋鍓峱osition銆?BR>
Writer鍜孫utputStream涔熸槸鐩鎬技鐨勶細
int write(int c) int write(char cbuf[]) int write(char cbuf[], int offset, int length)
And OutputStream defines the same methods but for bytes:
int write(int c) int write(byte cbuf[]) int write(byte cbuf[], int offset, int length)
鎵鏈夎繖浜涙祦,readers, writers, input streams, and output streams---鍦ㄥ垱寤虹殑鏃跺欒嚜鍔ㄦ墦寮錛屽彲浠ヨ皟鐢ㄤ粬浠殑
鍏抽棴鏂規(guī)硶鍏抽棴浠栦滑錛屾垨鑰呭厷瀵硅薄涓嶅啀浣跨敤鏃剁敱鍨冨溇鍥炴敹鏈哄埗鍥炴敹銆?/FONT>
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