Video: Puas yog ib qho kev xyaum zoo los ntes RuntimeException?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
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.
Ib yam li ntawd, koj tuaj yeem nug, nws puas yog 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.
Ib tug kuj yuav nug, nws puas yog kev xyaum zoo los ntes NullPointerException? Nws feem ntau yog qhov phem xyaum kom ntes NullPointerException . Programmers feem ntau ntes NullPointerException nyob rau hauv peb qhov xwm txheej: Qhov kev zov me nyuam muaj qhov tsis muaj qhov taw qhia tsis raug. ntes qhov kev zam tshwm sim tau yooj yim dua li kho qhov teeb meem hauv qab.
Tom qab ntawd, lo lus nug yog, peb puas tuaj yeem ntes RuntimeException?
Runtime kev zam ua tau tshwm sim nyob qhov twg hauv ib qho kev pab cuam, thiab nyob rau hauv ib txwm ib lawv ua tau ua kom ntau heev. Yog li ntawd, lub compiler ua tsis xav tau qhov ntawd koj ntes los yog teev cov kev zam runtime (txawm tias koj ua tau ). Ib rooj plaub uas nws yog ib qho kev xyaum pov ib RuntimeException yog thaum tus neeg siv hu ib txoj kev tsis raug.
RuntimeException yog dab tsi?
RuntimeException yog lub superclass ntawm cov kev zam uas tuaj yeem cuam tshuam thaum lub sijhawm ua haujlwm ntawm Java Virtual Machine. Ib txoj hauv kev tsis tas yuav tshaj tawm hauv nws cov lus ntuas ib qho subclasses ntawm RuntimeException uas tej zaum yuav muab pov tseg thaum lub sij hawm tua ntawm txoj kev tab sis tsis ntes tau.
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