Video: Peb puas tuaj yeem ntes tau pov tseg?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Yog lawm peb tuaj yeem ntes Throwable tab sis raws li kev xyaum zoo tshaj plaws, nws tsis yog qhia rau ntes Throwable . Catching Throwable suav nrog yuam kev ib yam nkaus, peb yuav tsum tsis txhob ntes yuam kev, nws pab txheeb xyuas JVM teeb meem.
Yog li ntawd, koj yuav tsum ntes tau pov tseg?
Tsis txhob Catch Throwable Koj tuaj yeem siv nws hauv ib ntes clause, mas koj yuav tsum yeej tsis ua! Yog koj siv Pov tau hauv a ntes clause, nws yuav tsis xwb ntes tag nrho cov kev zam; nws tseem yuav ntes tag nrho cov yuam kev. Qhov yuam kev raug muab pov tseg los ntawm JVM los qhia txog cov teeb meem loj uas tsis yog npaj los daws los ntawm daim ntawv thov.
Tsis tas li ntawd, nws puas yog ib qho kev xyaum zoo los ntes RuntimeException? Daim pam- ntes txhua yam - Exception lossis Throwable, uas yog qhov phem dua - tsis yog kev xyaum zoo vim tias koj tab tom xav tias koj tuaj yeem rov qab los ntawm txhua tus cwj pwm tshwj xeeb. Ib sab: Yog, ntes Exception kuj yuav ntes RuntimeException , vim Exception yog superclass ntawm RuntimeException.
Yog li ntawd, peb puas tuaj yeem muab pov tseg hauv Java?
Pov tau yog chav kawm super rau txhua hom kev ua yuam kev thiab kev zam hauv java ua . Chav kawm no yog ib tug tswv cuab ntawm java ua . lang pob. Tsuas yog piv txwv ntawm chav kawm no lossis nws cov chav kawm sub pov tseg los ntawm java ua virtual tshuab los yog los ntawm lub pov nqe lus.
Java yog dab tsi?
Cov Pov tau chav kawm yog superclass ntawm txhua qhov yuam kev thiab kev zam hauv lub Java lus. Tsuas yog cov khoom uas yog piv txwv ntawm cov chav kawm no (los yog ib qho ntawm nws cov subclasses) raug pov los ntawm cov Java Lub tshuab virtual lossis tuaj yeem cuam tshuam los ntawm cov Java pov nqe lus.
Pom zoo:
Peb puas tuaj yeem txuas ntxiv cov chav kawm pov tseg hauv Java?
Tag nrho cov khoom nyob rau hauv Java zam chav kawm hierarchy txuas ntxiv los ntawm Throwable superclass. Tsuas yog cov piv txwv ntawm Throwable (los yog ib qho khoom qub txeeg qub teg) raug cuam tshuam ncaj qha los ntawm Java Virtual Machine (JVM), lossis tuaj yeem cuam tshuam ncaj qha los ntawm cov lus pov tseg
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
Peb puas tuaj yeem siv sim tsis ntes hauv C#?
Qhov kawg thaiv tsis muaj ib qho rov qab, txuas ntxiv, rhuav cov lus vim nws tsis tso cai rau kev tawm ntawm qhov kawg thaiv. Koj tuaj yeem siv thaum kawg thaiv nkaus xwb nrog kev sim thaiv txhais tau tias tsis muaj qhov thaiv tab sis hauv qhov xwm txheej no, tsis muaj kev zam
Puas muaj ib txoj hauv kev pov tseg qhov kev kuaj xyuas los ntawm txoj kev uas tsis muaj cov lus pov tseg?
9 Teb. Koj tuaj yeem pov cov kev txwv tsis raug txheeb xyuas yam tsis tas yuav tshaj tawm lawv yog tias koj xav tau tiag tiag. Unchecked kev zam txuas ntxiv RuntimeException. Throwables uas txuas ntxiv yuam kev tseem tsis tau txheeb xyuas, tab sis tsuas yog yuav tsum tau siv rau cov teeb meem loj tiag tiag (xws li invalid bytecode)
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