Video: Puas tuaj yeem yuam kev raug ntes hauv Java?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Koj ua tau siv nws nyob rau hauv ib tug catch clause, tab sis koj yuav tsum tsis txhob ua nws! Yog hais tias koj siv Throwable nyob rau hauv ib tug catch clause, nws yuav tsis tsuas yog ntes tag nrho cov kev zam; nws yuav kuj ntes tag nrho yuam kev . yuam kev raug pov los ntawm JVM los qhia txog cov teeb meem loj uas tsis yog npaj los daws los ntawm daim ntawv thov.
Tsis tas li lo lus nug yog, peb puas tuaj yeem pov qhov yuam kev hauv Java?
Tus neeg hu xov tooj yuav tsum tau ua kev zam siv lub sim-catch thaiv los yog propagate lub kev zam . Peb tuaj yeem pov yog kuaj los yog tsis tau txheeb xyuas qhov kev zam. Cov pov lo lus tseem ceeb tso cai rau lub compiler los pab koj sau cov cai uas tswj cov hom no yuam kev , tab sis nws ua tsis tiv thaiv qhov txawv txav ntawm qhov kev zov me nyuam.
Tsis tas li ntawd, yuav ua li cas tshwm sim thaum kev zam tsis raug ntes hauv Java? Yog ib kev zam tsis raug ntes (nrog lub ntes thaiv), lub sijhawm ua haujlwm yuav rho tawm qhov program (piv txwv li tsoo) thiab ib qho kev zam cov lus yuav luam tawm rau lub console. Cov lus feem ntau suav nrog: lub npe ntawm kev zam hom.
Kuj kom paub, dab tsi yog qhov yuam kev thiab kev zam hauv Java?
Qhov txawv ntawm Yuam kev thiab kev zam hauv Java . Lub rau hli ntuj 3, 2016 1 Comments. "Throwable" ua raws li lub hauv paus rau Java qhov yuam kev thiab kev zam hierarchy. “ yuam kev ” yog ib qho teeb meem tseem ceeb uas tsis tuaj yeem ua raws li txoj cai ntawm qhov kev zov me nyuam. “ Kev zam ” yog qhov xwm txheej tshwj xeeb uas tuaj yeem ua raws li txoj cai ntawm qhov kev zov me nyuam.
Peb hom kev ua yuam kev hauv Java yog dab tsi?
Muaj peb yam yuam kev : syntax yuam kev , runtime yuam kev , thiab logic yuam kev.
Pom zoo:
Dab tsi yog qhov sib txawv loj ntawm kev txheeb xyuas qhov yuam kev thiab kev kho cov lej yuam kev?
Ob qhov kev tshawb nrhiav qhov yuam kev thiab kev kho qhov yuam kev yuav tsum muaj qee qhov ntawm cov ntaub ntawv rov qab xa mus nrog cov ntaub ntawv tiag tiag; kev kho yuav tsum muaj ntau tshaj li kev tshawb nrhiav. Parity bits yog ib txoj hauv kev yooj yim rau kev tshawb nrhiav qhov yuam kev. Ib qho parity me ntsis yog ib qho ntxiv me ntsis xa nrog cov ntaub ntawv uas tsuas yog 1-ntsis suav ntawm cov ntaub ntawv
Peb puas tuaj yeem muaj nested sim ntes thaiv hauv Java?
Nested sim ntes blocks. Exception handlers tuaj yeem nyob hauv ib leeg. Ib qho sim, ntes lossis qhov thaiv thaum kawg tuaj yeem muaj lwm txheej sim ntes thaum kawg ua ntu zus. Nyob rau hauv xws li ib tug scenario, thaum ib tug tshwj xeeb catch block tsis muaj peev xwm mus lis ib tug Exception, qhov kev zam no yog rethrown
Vim li cas kev cob qhia yuam kev tsawg dua qhov kev xeem yuam kev?
Kev cob qhia yuam kev feem ntau yuav tsawg dua qhov kev xeem yuam kev vim tias tib cov ntaub ntawv siv los ua kom haum tus qauv yog ua haujlwm los ntsuas nws qhov kev kawm yuam kev. Ib feem ntawm qhov tsis sib xws ntawm qhov kev cob qhia yuam kev thiab qhov kev xeem yuam kev yog vim tias cov txheej txheem kev cob qhia thiab cov ntawv xeem muaj qhov sib txawv ntawm cov khoom siv
Dab tsi yog qhov txawv ntawm kev sib raug zoo unary kev sib raug zoo binary thiab kev sib raug zoo ternary?
Kev sib raug zoo tsis sib xws yog thaum ob tus neeg koom hauv kev sib raug zoo yog tib lub koom haum. Piv txwv li: Cov ncauj lus yuav yog qhov yuav tsum tau ua ua ntej rau lwm yam kev kawm. Kev sib raug zoo ternary yog thaum peb lub koom haum koom nrog kev sib raug zoo
Peb puas tuaj yeem sau sim ntes hauv catch block hauv C#?
Nested sim-catch Siv qhov sim, ntes thiab thaum kawg blocks los lis kev zam hauv C #. Lub sim thaiv yuav tsum tau ua raws li los ntawm kev ntes los yog thaum kawg thaiv los yog ob qho tib si. Muaj ntau qhov thaiv thaiv tau tso cai nrog cov lim dej sib txawv. catch{..} thiab catch(exception exception){} ob leeg siv tsis tau