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Java

java?? ??

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

??? JDK (?? Java17Lts ??, Eclipsetemurin? ?? ??? ??? ???? ??), Java_home ? Path Environment ??? ???? Java Version ? Javac-Version Verification? ??????. 2. ?? IDE (?? IntellijideAcommunity)? ???? ????, ?? ??? ? Lombok ? Sonarlint? ?? ??? ????? ??????. 3. ?? ?? Maven ?? Gradle? ???? ??? ? ???? ??? ??????. GradleWrapper? ????? Maven? ???? maven_home? ???? ?? ????. 4. GIT? ???? ??? ??? ??????

Jul 31, 2025 am 09:01 AM

??? ????? Java : ????? ? ?? ??

JavaisapracticalChoiceFordatascienceEnenterPriseandlarge-scaleenvironments.1.apacheCommonsMathProvidesMatheMaticalandStaticalToolSforCustomAlgorithms.2.wekaoffersAccorceRHESIVESOITEOFMLALGORITHMSADGUITOOLS, TIRCFORPROTOPYGIPING

Jul 31, 2025 am 08:10 AM

Quarkus??? ???? ???? Java ?? ????

quarkusisidealforcloud-nativejavaapplicationsduetoitscontainer-firstdesign, enablingfaststartup, lowmemoryusage ? seamlesskubernetesandserversintegration.1.ItusSbuild-timeOptimizationTomInimizerOntimeOverHead.2

Jul 31, 2025 am 08:06 AM

java Quarkus

Java ?????? ?? ??? ??? JPA

Mas 1. ??? ?? ???? @Query? ??? ??? ? ?? ??? ??? JPQL ? ?? SQL? ?????. DTO ?? ????? ??? ???? ?? []? ???? ?? ?? ??? ??? ?? ??-?? ??? ???? ?? ????. 2. ??? ??? pagable? ?? ???? ??????? n 1 ?? ??? ???????. JoinFetch ?? Projection? ?? ?? ???? ?????? ?????? ???? ??? ???? ? ????. 3. ?? ?? ?? ??? ?? jpaspecifica? ???????

Jul 31, 2025 am 07:54 AM

java

Java ??? ?? ? ?? ??

?? ??? ?? ???? ???? ??? ??? ???? ? ?????. Latch? ??? ?? ??? ???? ???? ????? ???? ? ?????. 1. ReintrantLock? ?? Lock? Lock () ? Unlock ()? ?? ??? ???? ???? ??, ?? ?? ?? ????? ??? ????, ?? ?? ???? ?? ??? ??? ????? ?????. 2. CountdownLatch? ?? Latch? Countdown () ? Await ()? ???? ???? ?????. ?? ?? ??? ??? ???? ?? ???? ?? ????? ???? ????? ?????. 3. ???? ???? ?? ??? ??? ?? ?? ??? ???? ???? ??? ???? ???? ????? ??? ??????. ? ??? ?? ??? ?????? ?? ?? ?????.

Jul 31, 2025 am 07:45 AM

Java?? ?? ?? ??

Javaisaviableandpracticalchoiceformachinelearning, ?? inenterpriseenvironments

Jul 31, 2025 am 07:43 AM

Visual Studio ??? ??? ?? ?? ??

vScodeisApowerful, LightweightaltaliveAtiveFormoderNJavadevelovent.1. SetupjavyInstallingjdk11, vscode ? thejavaextensionpackforfullToolingsUpport.2.beneffficodeedcoding, ??? ???, ???? ? ???? ??

Jul 31, 2025 am 07:23 AM

Java? TDD (Test-Driven Development) ???

tddinjavafollowsthered-green-refactorcycle : firstWriteafailingTest, thenImplementMinimalCodetOpassit ? finallyRefactor thewhileainingTestCoverage.forexample, whenbuildAcalculatorclass, startBywritingatestfortheaddd () MethodThatfails (red)

Jul 31, 2025 am 06:48 AM

java tdd

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

useprofingtoolslikeasync-profiler, jprofiler, orjvmbuilt-intools (jstat, jstack, jmap) togatheraccurateperformancedatawithminima loverhead.2.analyzegarbagecollectionpatternsusinggclogsandtools-likegcviewer; switchtozgcorshenandoahforsub-10mspausesifonjdk11

Jul 31, 2025 am 06:36 AM

?? ?? ????? ??? IDE ? ??

IntellijideAisthetOpChoiceForJavadevelopmentDueToitssMartCodeColemetion, deepframeworkintegration, androbustrefactoringTools, withecommunitySuitableforpureJavaandultimate -fferingeringenterprisefeatures

Jul 31, 2025 am 06:33 AM

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

?? ?? ?? (?? ??)? ???? ???? ??? ??? ??? ?? ? ?? 1,000 ?? ???? ?????. 2. ItemReader? ????? ??????? ?? ?? ??? ???? ???? ??? ????? ?????. 3. ?? ?? ????? ????? ? ?? ? ??? ?? ?? ?? ??? ?? ? ? ???; 4. ??? ?????? ???? SpringBootactuator? ???? ?? ??? ???? ?? ??? ?? ?? ??? ??????. ??? ??? ??? ???? ???? ???? ?? ??? ????????.

Jul 31, 2025 am 06:26 AM

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

SeniorJavainterViewStestDeepExperTiseInjvminternals, ???, ??, ? ??? ?? ??? 1.understandjvmmemoryModel, gcgenerations, classloading, andusetools -likejmapandvisualvmtodiagnosememoryisss.2.mas

Jul 31, 2025 am 06:26 AM

java ??

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

?? ?? ??? ?? ??? ???? ?? ?? ? ???????. 2.? ??? ?? ??????, ?? ??? ????? ????? ??. 3. ??? ????? "?"? ???? ?? ???? ??? ????. 4. ?? ??? ??? ???? ?? ??? ? ??? ?? ??? ????. 5. ??? ??? ???? ???? ?? ??? ???? ????????. 6. ?? ???? ???? ???? ??? ??? ??????. 7. ???? ????? ?? VAR ? ???? ?? ?? Java ??? ???? ??; 8. ???? ????? ???? ??????? ??? ?? ??? ? ??? ?? ?? - ??? ??? ???? Java ??? ???? ????? ?????.

Jul 31, 2025 am 06:21 AM

java ?? ?? ??

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

?? Java-Xlog : startuptime ? ?? JVM ???? ???? ?? ??? ???? ?????, GC ?? ?? ? Main () ?? ??? ???????. 2. ?? ?? Async-Profiler ?? JFR? ???? ?? ???? ???? SpringRefresh () ?? ClassLoader.DefineClass? ?? ???? ????. 3. ?? ??? ?? ??? : ???? ????? CD? ???? ??? ???? ?????? ???, ??? ?????? ????, ???? ?? ??? ????, ???? ?? ??? ???, C2 ????? ??? ??? ?? GraalvMaot? ??????. 4. ??, ??, ???, ??? ????? ????? ???? ?? ? ?? ? ?? ??? ??????.

Jul 31, 2025 am 06:20 AM