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Java

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Java ?? ???? ?? (Project Jigsaw)

Java? ?? ??? (ProjectJigsaw)? Java9? ???? ???? ??? ??, ???? ?? ? ??? ?? ?????? ?? JDK? ??? ??? ?? ???????. 1. ?? ??, ???, ???? ??? ? ???? Module-Info.java ??? ?? ???? ??? ??? ? ???? ??? ?????. 2.java.base? ?? ??? ???? jdk.internal? ?? ?? ???? ????? ??? ? ? ????. 3. ???? JLink? ???? ??? ?? ? ?? ? ??? ? ???? ??? ?? ??? ?? ? ????. 4. ???? ??, ?? ?? ? ??? ???? ???? ? ???, ??? ????? ???????? ??? ??? ?? ? ?? ??? ??? ?? ??? ????. 5. ??

Jul 30, 2025 am 12:35 AM

java ???

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

SAGA ??? ???? ??? ????? ??? ?? ???? ???? ?? ?? ????? ???? ?????. ??? ? ???? ?? ??? ???? ?? ??? ??????? ???? ????? ????. ??? ???? ?? ??? ?? ??? ???? ??? ?????. ???? ? ?? ??? ????. 1. ?? : ???? ?? ??????? ???? ?? ?? ?????. ??? ? ????? ???? ??? ???, ??? ????? ????? ???? ????. 2. ??????? : ????? ?? ?????? ?????. ??? ???? ? ???? ?? ?? ?? ?? ??? ?? ??? ??? ????. Java??? ??? ?? ????? ?? ? SpringBoot? ?? ??? ? ????. ???? ?? ?? ?? ? ??? ?????

Jul 30, 2025 am 12:28 AM

??-?? ??? ?? Java ??? ? ??? ?? ??

javagenericsprovidecompile-timetypesafetyandeliminatecastecastingtypeparametersinclasses, interfaces, and methods, whilewildcardsenhance-flexibility withunknownlereusable;

Jul 30, 2025 am 12:27 AM

java ???

???? ??? ? Java 8 ?? ??

???? ???? Java8 ??? ????? ?? ?? ??? ????? ???? ???? ?? ??? ??? ??????. 1. Lambda ??? ? ?? ??? ???? People.Sort (Comparator.comparing (person :: getName))? ???? ?? ?? ??? ?? ???? ???? Lambda? ?? ??? ? ?? ? ? System.out :: println ? ?? ??? ??????. 2. user.stream (). filter (user :: isactive) .map (us

Jul 30, 2025 am 12:22 AM

java ??

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

javacandelivermicrosecond-levellatenciesinhftoperlyoptimized : 1. usezgcorshenandoahforsub-10msgcpausesandminimizeobjectallocationviaobjectpoolingandoff-heapmemorywithbytebuffer.allocatedirect () Orchroniclemaptoelimantinathinationgecto elimationalathinationgcriticalputs;

Jul 30, 2025 am 12:13 AM

??? ??? ?? Java?`Try-With Resources '? ?????

Try-With-Resources? ???? ?? ?? ??? ?? ???? ???? ???? ???? ?????. 1. Try ???? ?? ? ?? ??? ????? ???? ???? ????. 2. ?? ??? ? ??? ? ???, ?? ? ??? ?? ?? ??? ?? ?? ???, ?? ? ??? getSuppressed ()? ?? ?? ? ????. 3. ??? ?? ???? ?? ??? ??? ?????? ???? ?? ??? ??? ? ????. 4. ?? ???? ?? ??? ??? ??, Java9? ???? ?? ??? ????, ?? ???? ??? ? ??? ???, ???? NULL? ???? ?? ?? ? ????. ??? ???? ??? ??? ?

Jul 30, 2025 am 12:03 AM

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

javacollectionsframework? ????? ?? ?? ??, ??, ? ? ? ? ?? ??? ? ?? ?? ?????? ???? ?? ????? ? ???? ?? ??? ???????. 2. ?? ????? ?? ??? ??? ??? ???? ??? ?????? Arraylist, ? ?? ? ??? ?? ? ????? Arraydeque, De-Reuse??? ??, ????? ?? ? ? ?? ??? ?? ??? ?? ?? ?? ??? ?????. 3. ??, ??, ???, ??? ?? ???? ??? ? ?? ?? ???? ???? ? ???? Array.aslis???? ?????.

Jul 29, 2025 am 03:00 AM

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

javarecordsareIdealforcreatingimmutabledosbecausetheyeliminateboilerplatecodeandefeMutabilitabilitabledesign.1. recordsautomically GenerateConstructors, Accessors, Equals, Hashcode, andtostringmethods, retostringmethods.2

Jul 29, 2025 am 02:57 AM

Jenkins ? Gitlab? ??? Java ????? CI/CD ??? ??

setupgitlabrepository, jenkinsserverwithrequiredplugins (git, gitlab, pipeline, maven), jdk ? propertools; 2. configuregitlabwebhook withjenkinsurl (http : // project/) ?triggeronpushevents; 3. createajenkinsfileintheprojectrootusingdeclarativeSyxTodeFinestag

Jul 29, 2025 am 02:51 AM

java ci/cd

Lambdas? ?? Java? ??? ????? ??

??? ? ?????? ?? ??, ??, ???, ?? ??, ??? ? ???? ?? ??? ???? abstractionandsupportlambdaexpressions.2

Jul 29, 2025 am 02:49 AM

Java ?? ????? ??? ??? JPA ? JDBC

SpringDataJPA? ?? ???? ?? ??? ??? ??? ???, ?? CRUD ?? ????? ?? ??? ?????. 2. JDBC? ? ?? ??, ??? ??? ??, ??? ? ?? ??? ????? ??? ?? ????. 3. JPA ???? ?? ? ??? ???? ? ???? JDBC?? ? ?? ?? ??? ?????. 4. ?? ???? JPA? ???? ?? ?? ?? ?? ??? SQL ?????? JDBC? ???? ?? ????. ?? ????? ?? ??? ? ?? ??? ???? ?? ????? ??? ?? ? ? ????.

Jul 29, 2025 am 02:48 AM

java jdbc

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

??? ? ?? ?? ??? ????, ?? ??? ???, pauselessgcjvms likeszingorzgc, andtuningHeapsize? ????, 2.optimizemorylayoutwithArraySoverCollections, ?? ? ANDPREVENTFALSESHARINGUSINGSTORLIBRIRIESLIKEAGRONA.3

Jul 29, 2025 am 02:48 AM

java 金融交易

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

javaclassloadersareestionalcomponentsof thejrerSponsibleforloadibleforlodsiplessintothejvmatruntime, enabling-modularity, security ? dynamicbehavior.1.thetheprebuilt-inclassloadersearebootstrap (loadscorejavaclassesinnativecode), Extension/Platform (loadssssssssssclassesf

Jul 29, 2025 am 02:47 AM

JPA ? ?? ?? ???? Java ??? : ??? ???

internityStatesandPersistEnceCeCextToaVoidissueslikLikleInitializationException, AlwaysEtherTurnEdInstanceCrommerge.2.opTimizeFetchingStrategiesUsingJoinfetch,@EntityGraph ??@BatchSizetOpreventn 1queriesandmanagelazyloadingProperly.3.choose

Jul 29, 2025 am 02:42 AM

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