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Video: Dab tsi yog hom kev zam hauv Java?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Hom ntawm Java Exceptions
Feem ntau muaj ob hom kev zam : checked thiab unchecked. Ntawm no, qhov yuam kev yog suav tias yog qhov tsis tau txheeb xyuas kev zam.
Ntxiv mus, dab tsi yog qhov txawv ntawm kev zam hauv Java?
Hom Exception hauv Java nrog piv txwv
- ArithmeticException. Nws raug pov tseg thaum muaj xwm txheej tshwj xeeb tau tshwm sim hauv kev ua lej lej.
- ArrayIndexOutOfBoundsException.
- ClassNotFoundException.
- FileNotFoundException.
- IOException.
- InterruptedException.
- NoSuchFieldException.
- NoSuchMethodException.
Ib yam li ntawd, qhov kev zam hauv Java nrog piv txwv yog dab tsi? 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.
Xav txog qhov no, dab tsi yog qhov tshwj xeeb hauv Java?
Kev zam yog cov xwm txheej uas tshwm sim thaum lub sij hawm ua tiav cov kev pab cuam uas cuam tshuam qhov kev khiav hauj lwm ntawm cov lus qhia (piv txwv li faib los ntawm xoom, array nkag tawm ntawm kev khi, thiab lwm yam). Hauv Java , ib kev zam yog ib yam khoom uas qhwv ib qho kev ua yuam kev uas tshwm sim nyob rau hauv ib txoj kev thiab muaj: Lub xeev ntawm qhov kev pab cuam thaum qhov yuam kev tshwm sim.
Exception hom kev zam yog dab tsi?
Hom kev zam Muaj peb hom kev zam : Predefined kev zam yog cov xwm txheej yuam kev uas txhais los ntawm PL/SQL. Tsis-predefined kev zam suav nrog cov txheej txheem TimesTen yuam kev. Cov neeg siv tau txhais kev zam yog kev zam tshwj xeeb rau koj daim ntawv thov.
Pom zoo:
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Qhov kev zam ToString puas suav nrog kev zam sab hauv?
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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