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Java

Java???

Java? jar ???? ??????

Java? jar ??? Java? ?? ????, zip ??? ??? ?? ??????. ????? ?? ? ?? ???? ???? ?? ? ??? ?????. ??? ???? ?? .jar ??? ??? ??????.

Dec 03, 2019 pm 03:08 PM

java

Java ???? ???? ??

"java" ???? ?? ??? ??? ????. ?? ????? ?? ???? ?? "Serialized" ?????? ??? ?? ?? ???? ???? ?? ??? ??? ??? ?? ?? ???? "writeObject" ???? ?????. "obj" ??? ????? ???? ? ????.

Dec 03, 2019 pm 03:08 PM

java ???? ???

??? ?????? ???? ?????

Java? Android? ???: Android? ?? ????? ?????? Java? ?? ?????. ?????? ?? ??? ??? ???? ????, ??? ?? ????? ???? ????.

Dec 03, 2019 pm 02:57 PM

java

Java?? ??? ?? ? ??? ??? ??? ? ?? ?? ??

Java? ??? ?? ? ??? ??? ??? ??? ?? ?? ??: Java?? ??? ?? ? InputStreamReader ????? ??? ???? ??? ??? "UTF-8"? ???? Java? ??? ?? ? ??? ??? ??? ??? ??? ? ????.

Dec 03, 2019 pm 02:38 PM

java

???? ?? ??? ??? ?? ??

Java?? ??? ??? ??? ???? ??: 1. Calendar ???? ???? ??? ??? ??? ?????. ? ???? ?? ?? ????? ?????. 2. SimpleDateFormat ???? ???? "EEEE" ????? ???? ??? ?????.

Dec 03, 2019 pm 02:17 PM

java

Java?? ?? ??? ???? ???? ? ???? ??? ???? ????? "?????"?? ???. ????? ??: 1. ?????? ???? ?? ???? new() ???? ???? ??? ?????. 2. clone ???? ???? ??? ?????. 3. Class.forName ???? ???? ???? ?? ?? ???? newinstance() ???? ?????.

Dec 03, 2019 pm 02:04 PM

java ?????

???? ???? ???? ?? ??

Java?? ???? ???? ???? ??: 1. Java??? ??? "[a-zA-Z]+"? ???? ???? ?? ???? ??? ? ????. 2. ??? ".*[a-zA-z].*"? ???? ???? ??? ???? ??? ?????.

Dec 03, 2019 pm 01:52 PM

java

Java?? ??? ???? ??? ??????

Java?? ??? ???? ??: 1. FileStreams? ???? ????, FileInputStream? ???? ?? A? ???? ??, FileOutputStream? ???? ?? B? ???. 2. FileChannel? ???? ?????. 3. Commons IO ??? ?????.

Dec 03, 2019 pm 01:35 PM

java

Java?? ??? ???? ???? ??

Java?? ??? ???? ???? ??: 1. Character.isDigit(char)? ???? ?????. 2. ??? ??? ?? ?????. ?? ??? ??? ?? ??? ???? false? ?????. 3. ???? ???? ?????.

Dec 03, 2019 pm 01:18 PM

java

?? ??? ??????

Java? Map? ?? ?????? ???? ????. Map? ??? ??? ?? ??? ??? ? ?? ?? ? ??? ??? ???? ?????. ? ?? ?? ????.

Dec 03, 2019 am 11:56 AM

java

??(prime number)?? ??? ???? Java ???

Java?? ??(??)?? ???? ??: ?? if(src%2==0) ?? ???? ??? ?? ?? for(? ?????. int i=3;i<=sqrt;i+=2) ? src%i ?? ???? ???? ?? ? ??? ?????.

Dec 03, 2019 am 11:35 AM

java

cmd? ??? ? Java?? ??? ??? ?? ???

cmd ?? ? java?? ??? ??? ?? ?? ??: 1. cmd?? ??? ???? java ??? ??? ? -encoding ?? ??? ???? ??? ??? ?????. 2. ????? ?????? "AVA_TOOL_OPTIONS" ??? ???? ??? ??? ?????.

Dec 03, 2019 am 11:19 AM

java

Java ???? ? ??? ?? ??? ?? ??? ??

??? Java ???? ?? ??? ?? ?? ??: 1. URLEncoder.encode() ???? ???? ?? ??? UTF8? ????? ?? ??? ???? ????? ?????. 2. ??? ?? ??? ?? ???? ISO8859-1 ????? ?????.

Dec 03, 2019 am 10:53 AM

java