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Java ????? ???? ???? ??? ? ??? IDE? ???? Eclipse? ???? ? Java ??? ??? ??? ????.
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(1) Eclipse ????? ? ? ?? Eclipse?? ? JAVA ???? ???? ?????. ?? ?? ????? "File - New - Java Project"? ???? ???? ?????. ?? ? ????? ??? ?????.
(2) Java ????? ?? ?????? ?? "Java ????"? ??? ?????. ??? ?????? "?? ?? ??"? ?? ?????. .
(3) "Java Project"? ??? ?? ??? ??? ? "Finish"? ???? ??? ???? ??? ????? ?????.
(4) ???? ???? ?? ???? ???? ??? ???? ??? ??? ? ????.
(5) "Java Project"? Java ????? ?? ??????. ???? Java ??? ? ???? ???? ???? ???. ?? ?? ????? "File——New——Package"? ???? ?????. ??? ?? ???? ???.
(6) ? "???" ??? ??? ? ????? ? ????? ?? ??? ???? ?????. "Package" ??? ???? "Finish"? ????? ?? ???. ??? ??.
(7) ?? ??? ???? ??? ?? ?????? "src" ??? ??? "Package"? ??? ??? ?? ??? ? ????. ??? ??? ??? ???? "New— —Class" "java ???"? ????.
(8) ? ????? ???? ?? ??? ?????. ???? ????? ?? ??? ???? ?????. ??? ????? ?? ??? ?? ?? ?? ????. ?? ?? ? ?? ??? ???? ? ? ?? ?????.
(9) "???" ??? ???? ??? ?? ???? ????? ???? ????, ??? Java ???? ?????? ??? ? ????. ??? ??? ????? ????? ?? ???.
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vscode settings.json ??
Aug 01, 2025 am 06:12 AM
settings.json ??? ??? ?? ?? ?? ?? ?? ??? ??? VSCODE ??? ??? ???? ? ?????. 1. ??? ?? ?? : Windows? C : \ Users \\ AppData \ Roaming \ Code \ User \ Settings.json, MacOS IS /users//library/applicationsupport/code/user/settings.json, linux? /home//.config/code/user/settings.json; 2. Workspace ?? ?? : .vscode/settings project root ????
JDBC? Java? ??? ???? ??? ??????
Aug 02, 2025 pm 12:29 PM
JDBC ????? ???? ????? ?? ?? ?? ??? ?? ?? ??? ?? ? ?? ??? ?? ?? ?? ??? ???????. 1. ????? ????? Conn.SetAutoCommit (False)?? ??????. 2. ??? ? ????? ?? ?? SQL ??? ?????. 3. ?? ??? ??? ?? Conn.commit ()?? ???? ??? ???? ???? ?? ??? ???? Conn.Rollback ()?? ??????. ???, ? ??? ???? ????, ??? ???? ????, ?? ??? ??? ?? ??? ??? ???? ? ???????. ?? ?? ?? ???? ????? ??? ???? ?? ?? ???? ???? ??? ????? ?? ??? ??? ? ?? ???? ?? ????.
???? ??? ?? Java? ??? ?? ??? ?
Aug 01, 2025 am 05:53 AM
??? (DI) ISADESIGNPATTORNWHEREWHEDROUDIVESTESTESTETESTERGROWCONSTRUCTOR, 2.SPRINGFRAMEWWERTHUSENONTATIONS? ??@autowiredWithjava ?? CONCUTTATIONS LIKERWITHCONSTRUCTOR, ORFIELDINGESS.2.SPRINGFRAMEWWERTHUSENNOTATIONS
JVM (Java Virtual Machine) ?? ??
Aug 01, 2025 am 06:31 AM
thejvmenablesjava? "WriteOnce, Runynywhere"??? ?? excodecodethroughfourmaincomponents : 1. theclassloadersubsystemloads, ??, ? intinitializes.classfilesusingbootsprap, extension, andapplicationclassloaders, ensuringsecureandlazyclasloa
Java? ??? ?? ??? ??????
Aug 02, 2025 am 02:38 AM
?? ?? ? ?? ???? ???? ?? Java.Time ???? ???? ??????. 2. LocalDate, LocalDateTime ? LocalTime? ?? ?? ??? ??? ?????. 3. () ???? ???? ?? ??? ??? ????. 4. ???/???? ??? ???? ??? ????? ??? ??????. 5. ZonedDateTime ? Zoneid? ???? ???? ??????. 6. DateTimeFormatter? ?? ?? ? ?? ?? ?? ???; 7. ??? ?? ?? ?? ??? ????? ?? ??????. ?? Java? ?? ??? ???? ??? ??? ???? Java.Timeapi ??? ?? ??? ???????.
Google Chrome? ?? ??? ? ? ????
Aug 01, 2025 am 05:24 AM
chromecanopenlocalfiles likehtmlandpdfsbyusing "OpenFile"OrdraggingTheMintoTheBrowser; ensuretHeadDressStartSwithFile : ///; 2.SecurityRestrictionSblockajax, LocalStorage, andcross-folderaccessonfile : //; usealocalsertpython-mhtpython-mhtpython-mhtppy
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Aug 01, 2025 am 06:40 AM
NetworkPortSandfirewallsworkTogetToenableCommunication whileensuringsecurity.1.networkportSarevirtualendpointsnumbered0–65535, Withwell-nownports like80 (http), 443 (https), 22 (ssh) ? 25 (smtp) ?? (specservices
Java ??? ?? ?? : Spring Boot vs Quarkus vs Micronaut
Aug 04, 2025 pm 12:48 PM
Pre-FormancetArtUptimeMoryUsage, Quarkusandmicronautleadduetocompile-timeprocessingandgraalvsupport, withquarkusoftenperforminglightbetterine serverless sinarios.2.thyvelopecosyste,
