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Java

Java???

java? mysql? ??? ??? ?????.

mysql? ??? ??? ???? java ?? ??: 1. ??? ?? ????? ?? ??? utf-8? ?????. 2. ??????? ????? ??? ? setCharacterEncoding? ???? ??? ??? ?????. ??????? ??? ? utf8"???.

Nov 15, 2019 pm 04:23 PM

java ??? ?? ??? ???

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Java ????? ?? ??? ??? ????. 1. ???? ???? ? ?? ?? 2. ???? ?? ? ??? ?? 4. ???? ?? ??? ???? ?? 6. ??? ??? 7. ??? ?? ???.

Nov 15, 2019 pm 04:16 PM

java ???? ?? ????

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Java ??? ???: Java ??? ???? ???? ???? ??? ??? ???? ?? ????? ???? ?????? ???. ?? Eclipse ?????? ???? Java ????? ??? ?? ?? ???? ???? ????? Eclipse? ?? ??? ?????.

Nov 15, 2019 pm 04:01 PM

java ?? ??

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Java? ????? ??? ?????. 1. ?? ???(ArrayList ???, Vector ???, LinkedList ???) 2. ?? ???(Hashset ???, Treeset ???)

Nov 15, 2019 pm 03:40 PM

java ???

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

Java?? ?????? ???? ???? ??? ????. 1. ?????? ?? ???? ???? ???? ??? ??? ???? ???? ? ?????. 2. ?????? ?? ??? "?? ?? ??"?? ???? ?????. ?????.

Nov 15, 2019 pm 03:26 PM

java ??? ????? ???

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

Java?? ???? ?????? ???? ??? ?? ?? URL? ??? ? ?? ?? ?? ??? ??? ?? "httpUrlConnection"?? ???? ??? "httpUrlConnection"?? ??? ??? ???? ????? ??? ?? ????. .

Nov 15, 2019 pm 03:15 PM

java ????? ???

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Java?? ???? ???? ???? ??? ????. ???? ??? ??? ???? ?? ??? ??? ??? ?? ??????. ???? ???? ??? ?? ??? ???? ? ?????. ???? ???? ???? ? ?????. ?? ?? ??? ???? ??.

Nov 15, 2019 pm 02:57 PM

java ??? ?? ???

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

Java? ??? ?? ??? ??? ????. ? ??? ?? ??? ?? ??? ????, ?? ??? ?? ??? ?? ??? ??? ?? ??? ?? ??? ?????.

Nov 15, 2019 pm 02:35 PM

java ??? ??

Java? ?????? ???? ????? ?????.

Java?? ?????? ???? ????? ???? ??? ?? JDBC ??? ??? ??? ?? Java.sql.DatabaseMetaData ?????? ?? ?????? ???? ????? ???? ????. ???? ??? ?? ? ???? ????? ??? ?? ?????.

Nov 15, 2019 pm 02:25 PM

java ?? ???? ?????? ???

Java? ???? ??? ? ??? ?????.

Java? ???? ??? ? ??? ???? ??? ??? ????. String ????? ???? "substring(int from, int to)" ??? ??? ? ????. ?? ???? ??? ??? ?? ??? ?????. ???? n? ?? ??? ???? ? ?? ?????. ????? ? ?????.

Nov 15, 2019 pm 02:09 PM

java ?? ? ????

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

Java ????? ????? Scanner ???? ???? ???? ?????. ?: "Scanner in = new Scanner(System.in)", ?? ???? ????? ???? ??? Enter ?? ?? ??? ??? ???? ?? ??? ?? ??? ?????.

Nov 15, 2019 pm 01:55 PM

java ??? ??

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

Java? ?? ???? ????? ?? ? ?? ??? ???? ???. 1. ?? ???? ?? ??? ??? ?????? ?? ??? ??? ?? ???? ????. 2. ?? ??? ?? ??? ??? ?????. ??? ?? ?????.

Nov 15, 2019 pm 01:21 PM

java ?? ??? ????

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Java? ???? ? ?? ??? ?? ?? ??: 1. ??? ?? Path? ???? jdk\bin ????? ?????. 2. ???? ???? Java ?? ???? utf-8? ???? -encoding utf-8? ???? ?????. ???? ? ??? ??.

Nov 15, 2019 pm 01:16 PM

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