Video: Dab tsi yog qhov kev zam Java Lang?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Chav kawm java ua . Chav kawm Kev zam thiab nws cov subclasses yog ib daim ntawv ntawm Throwable uas qhia txog cov xwm txheej uas ib daim ntawv thov tsim nyog yuav xav ntes. Saib Ntxiv: yuam kev. Kev zam () Tsim ib qho Kev zam tsis muaj cov lus qhia ntxaws.
Ntawm no, dab tsi yog txhais los ntawm kev zam hauv Java?
Txhais : Ib kev zam yog ib qho xwm txheej, uas tshwm sim thaum lub sij hawm ua tiav ntawm ib qho kev pab cuam, uas cuam tshuam qhov kev khiav hauj lwm ntawm qhov kev pab cuam cov lus qhia. Thaum ib qho yuam kev tshwm sim nyob rau hauv ib txoj kev, tus txheej txheem tsim ib yam khoom thiab muab nws tawm mus rau lub runtime system. Qhov block ntawm code no hu ua ib kev zam tus tuav.
Ib tug kuj yuav nug, vim li cas kev zam raug siv hauv Java? Kev zam : Kev zam qhia tau hais tias ib daim ntawv thov tsim nyog yuav sim ntes. Tag nrho kev zam thiab hom kev ua yuam kev yog cov chav kawm sub ntawm chav kawm Throwable, uas yog cov chav kawm ntawm hierarchy. Ib ceg yog coj los ntawm Kev zam . Chav kawm no yog siv rau tshwj xeeb tej yam kev mob uas cov neeg siv cov kev pab cuam yuav tsum tau ntes.
Kuj paub, dab tsi yog qhov tshwj xeeb hauv Java nrog piv txwv?
Runtime yuam kev yog hu ua ib Kev zam yuam kev. Nws yog ib qho xwm txheej uas cuam tshuam qhov kev khiav haujlwm ntawm kev ua haujlwm. Piv txwv rau kev zam yog, arithmetic kev zam , Nullpointer kev zam , Faib los ntawm xoom kev zam , lwm. Exceptions nyob rau hauv Java yog ib yam dab tsi uas tawm ntawm developers tswj.
Java lang yog dab tsi?
Java . lang pob hauv Java . Muab cov chav kawm uas yog qhov tseem ceeb rau kev tsim qauv Java programming lus. Cov chav kawm tseem ceeb tshaj plaws yog Object, uas yog lub hauv paus ntawm chav kawm hierarchy, thiab Class, piv txwv ntawm cov chav kawm thaum lub sijhawm khiav.
Pom zoo:
Dab tsi yog qhov Performance index tawm ntawm kev zam zam hauv Java?
Index Out of Bound Exception. Index Out of Bound Exception yog qhov Unchecked Exception uas tshwm sim ntawm kev khiav haujlwm yuam kev. Qhov no tshwm sim vim qhov tsis raug parameter dhau mus rau ib txoj hauv kev hauv cov cai. Lub java Compiler tsis kuaj qhov yuam kev thaum lub sij hawm muab tso ua ke ntawm ib qho kev pab cuam
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 dav thawj qhov kev tshawb nrhiav thiab qhov tob thawj qhov kev tshawb fawb?
BFS sawv rau Breadth First Search. DFS sawv cev rau Kev Tshawb Nrhiav Qhov tob. 2. BFS (Breadth First Search) siv Queue cov qauv ntaub ntawv los nrhiav txoj hauv kev luv tshaj. BFS tuaj yeem siv los nrhiav ib qhov chaw luv tshaj plaws hauv cov duab tsis hnyav, vim tias hauv BFS, peb mus txog qhov kawg uas muaj qhov tsawg kawg nkaus ntawm cov npoo los ntawm qhov chaw vertex
Qhov kev zam ToString puas suav nrog kev zam sab hauv?
ToString() yuav qhia hom kev zam, lus, ntxiv rau ib qho kev zam sab hauv. Tsis tas li ntawd xwb! Yog tias FaultException yog InnerException ntawm, piv txwv li, System
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