Video: Dab tsi yog qhov yuam kev hauv Java?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Sau sij hawm yuam kev yog hom twg yuam kev uas tiv thaiv a java ua qhov kev pab cuam sau ua ke zoo li ib tug syntax yuam kev , chav kawm tsis pom, lub npe tsis zoo rau cov chav kawm uas tau hais tseg, qhov ua tau poob ntawm qhov tseeb thaum koj sib xyaw sib txawv java ua hom ntaub ntawv thiab lwm yam. Ib lub sijhawm ua haujlwm yuam kev txhais tau tias ib yuam kev uas tshwm sim, thaum lub program tab tom khiav.
Ib yam li ntawd, txhais li cas los ntawm kev sib sau yuam kev?
Kev muab tso ua ke yuam kev hais txog lub xeev thaum a compiler ua tsis tiav sau ua ke ib daim ntawm lub khoos phis tawj program qhov chaws, vim yog qhov yuam kev hauv cov lej, lossis, ntau qhov txawv txav, vim qhov yuam kev hauv compiler nws tus kheej. A kev ua yuam kev lus feem ntau pab programmers debugging qhov chaws.
peb hom kev ua yuam kev yog dab tsi? Muaj peb yam yuam kev : syntax yuam kev , runtime yuam kev , thiab logic yuam kev . Cov no yog yuam kev qhov twg lub compiler pom ib yam dab tsi tsis ncaj ncees lawm nrog koj qhov kev pab cuam, thiab koj tsis tuaj yeem sim ua nws. Piv txwv li, tej zaum koj yuav muaj cov ntawv sau tsis raug, lossis tej zaum yuav sim siv qhov sib txawv uas tsis tau tshaj tawm.
Ib yam li ib tug yuav nug, peb hom kev ua yuam kev hauv Java yog dab tsi?
Muaj peb hom kev ua yuam kev: syntax yuam kev, logical yuam kev thiab run-time yuam kev. ( Logical yuam kev tseem hu ua semantic yuam kev). Peb tau sib tham txog qhov yuam kev syntax hauv peb daim ntawv ntawm cov ntaub ntawv yam tsis raug.
Lub sijhawm ua haujlwm yuam kev hauv Java yog dab tsi?
A runtime yuam kev txhais tau tias ib yuam kev uas tshwm sim, thaum lub program yog khiav . Nrog rau qhov zoo li no yuam kev java txhais Exceptions. Kev zam yog cov khoom sawv cev rau ib qho kev txawv txav hauv kev khiav ntawm qhov kev pab cuam.
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
Dab tsi yog qhov txawv ntawm qhov yuam kev hauv kev suav nyiaj?
Muaj ntau ntau hom kev ua yuam kev hauv kev suav nyiaj. Accounting yuam kev yog feem ntau unintentional yuam kev ua thaum sau phau ntawv sau. Subsidiary nkag. Qhov yuam kev ntawm Omission. Transposition yuam kev. Rounding yuam kev. yuam kev ntawm Txoj Cai. yuam kev ntawm Reversal. Qhov yuam kev ntawm Commission
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
Leej twg tsim qhov yuam kev ntawm qhov yuam kev?
Lub sij hawm tseem ceeb ntawm qhov yuam kev raug tsim nyob rau xyoo 1977 los ntawm tus kws kho mob hlwb Lee Ross. Txawm li cas los xij, kev tshawb fawb txog qhov yuam kev tseem ceeb rov qab mus rau xyoo 1950 thaum cov kws paub txog kev puas siab puas ntsws Fritz Heider thiab Gustav Ichheiser pib tshawb xyuas cov neeg nkag siab txog qhov ua rau tib neeg tus cwj pwm
Dab tsi yog qhov yuam kev thiab kev zam hauv Java?
Qhov yuam kev 'qhia txog teeb meem loj uas daim ntawv thov tsim nyog yuav tsum tsis txhob sim ntes.' thaum. Ib qho Exception 'qhia tau hais tias ib daim ntawv thov tsim nyog yuav xav ntes.' Yuam kev nrog rau RuntimeException & lawv cov subclasses yog unchecked kev zam. Tag nrho lwm cov chav kawm Exception raug kuaj xyuas