Video: Dab tsi yog E hauv catch block?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
' e ' tsuas yog parameter nws txhais tau tias catchblock tuaj yeem tau txais qhov kev sib cav thiab Cov Ntaub Ntawv hom kev sib cav isexception datatype.
Ua raws li qhov no hauv kev txiav txim siab, peb yuav txhais li cas thaiv thaiv?
"Tsim" thiab " ntes " yog cov lus tseem ceeb uas sawv cev rau kev tswj hwm ntawm kev zam vim cov ntaub ntawv lossis kev coding yuam kev thaum lub sijhawm ua haujlwm. thaiv yog cov thaiv ntawm code inwhexceptions tshwm sim. A ntes block catches thiab handlestry thaiv kev zam.
Tsis tas li ntawd, Java zam E yog dab tsi? Kev zam yog cov xwm txheej uas tshwm sim thaum lub sijhawm ua tiav ntawm cov kev pab cuam uas cuam tshuam qhov kev khiav dej num ntawm cov lus qhia (xws li faib los ntawm xoom, array nkag tawm ntawm kev khi, thiab lwm yam). Java , ib kev zam yog ib yam khoom uas wraps anerrorevent uas tshwm sim nyob rau hauv ib txoj kev thiab muaj: Cov ntaub ntawv hais txog qhov yuam kev nrog rau nws hom.
Ib tug kuj nug, koj siv sim ntes block li cas?
Muab cov nqe lus code uas yuav nce lossis pov tseg rau hauv a sim thaiv , thiab qhov chaw nqe lus siv los daws qhov kev zam lossis kev zam hauv ib lossis ntau dua catchblocks hauv qab no sim thaiv.
Lub hom phiaj ntawm qhov kawg thaiv yog dab tsi?
Cov thaum kawg thaiv ib txwm executes thaum thetry thaiv tawm. Qhov no xyuas kom meej tias cov thaum kawg thaiv raug rho tawm txawm tias muaj kev zam tsis tau tshwm sim. Tab sis thaum kawg muaj txiaj ntsig zoo rau ntau tshaj qhov tshwj xeeb tuav- nws tso cai rau tus programmer kom tsis txhob muaj kev ntxuav codeaccidentally bypassed los ntawm kev xa rov qab, txuas ntxiv, lossis tawg.
Pom zoo:
Yuav ua li cas yog ib tug txheej txheem nyob rau hauv lub operating system dab tsi yog ib tug xov nyob rau hauv lub operating system?
Ib tug txheej txheem, nyob rau hauv cov nqe lus yooj yim tshaj, yog ib tug executingprogram. Ib tug los yog ntau tshaj threads khiav nyob rau hauv cov ntsiab lus ntawm cov txheej txheem. Ib tug xov yog ib qho tseem ceeb chav tsev uas theoperating system faib lub sij hawm processor. Lub threadpool feem ntau yog siv los txo tus naj npawb ntawm cov ntaub ntawv thov thiab muab kev tswj hwm ntawm cov neeg ua haujlwm threads
Dab tsi yog block qib cim npe hauv HTML?
Ib qho thaiv-theem theem tuaj yeem nqa ib kab lossis ntau kab thiab muaj kab tawg ua ntej thiab tom qab lub ntsiab. Lwm cov piv txwv ntawm block-theem tagare: Cov cim npe rau Daim Ntawv Teev Npe (Ordered, Unordered, Description and List Item) tags
Dab tsi yog txoj hauv kev virtual thiab txoj hauv lub cev hauv asp net?
Ua ntej tshaj, cia peb tau txais cov ntsiab lus ntawm ob qho tib si. Txoj kev lub cev - Qhov no yog txoj hauv kev tiag tiag cov ntaub ntawv nyob ntawm IIS. Txoj kev Virtual - Qhov no yog txoj hauv kev kom nkag mus rau cov ntaub ntawv uas tau taw qhia los ntawm sab nraud ntawm IIS daim ntawv thov folder
Dab tsi yog catch exception hauv Java?
Java ntes block yog siv los daws qhovException los ntawm kev tshaj tawm hom kev zam tsis pub dhau qhov ntsuas. Qhov kev zam tshaj tawm yuav tsum yog qhov kev zam ntawm cov parentclass (piv txwv li, Exception) lossis hom kev zam tshwj xeeb. Lub catch block yuav tsum tau siv tom qab sim block nkaus xwb
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