Video: Ob chav kawm puas muaj tib serialVersionUID?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Yog, nws muaj peev xwm ua tau ob txawv cov chav kawm tuaj yeem muaj tus tib serialVersionUID tus nqi. Tab sis nyiam siv ib qho tshwj xeeb rau txhua tus chav kawm . Kuj tseem siv 8 txog 10 tus lej ntev dua ib qho tsis yog 1 tus nqi xwb.
Yog li ntawd, serialVersionUID yog dab tsi?
Cias muab, lub serialVersionUID yog tus cim tshwj xeeb rau cov chav kawm Serializable. Qhov no yog siv thaum lub sij hawm deserialization ntawm ib yam khoom, los xyuas kom meej tias cov chav kawm loaded yog sib xws nrog cov khoom serialized.
Ib yam li ntawd, kev siv serialVersionUID 1l yog dab tsi? Cov serialVersionUID yog universal version identifier rau chav kawm Serializable. Deserialization siv tus lej no los xyuas kom meej tias cov chav kawm loaded sib raug raws nraim rau ib qho khoom serialized. Yog tias tsis pom qhov sib tw, ces qhov InvalidClassException raug pov tseg.
Ib yam li ntawd, nws tau nug, puas yog serialVersionUID xav tau?
lub neej ntawd serialVersionUID Kev suav yog qhov nkag siab zoo rau cov ntsiab lus hauv chav kawm uas yuav txawv nyob ntawm kev siv compiler, thiab ua tau yog li ua rau poob siab InvalidClassException s thaum lub sij hawm deserialization. Yog li ntawd, koj yuav tsum tshaj tawm serialVersionUID vim nws ua rau peb tswj tau ntau dua.
Lub luag haujlwm ntawm serialVersionUID yog dab tsi hauv cov txheej txheem serialization?
Thaum serialization , java runtime associates a version number with each serializable chav kawm. Tus lej no hu serialVersionUID , uas yog siv thaum lub sij hawm deserialization los xyuas kom meej tias tus sender thiab receiver ntawm a serialized cov khoom tau thauj cov chav kawm rau cov khoom ntawd uas sib haum nrog kev hwm serialization.
Pom zoo:
Dab tsi yog txheej txheem ntawm kev txhais ob lossis ntau txoj hauv kev hauv tib chav kawm uas muaj tib lub npe tab sis sib txawv tsis tshaj tawm?
Method overloading Tus kos npe ntawm ib txoj kev tsis suav nrog nws cov khoom xa rov qab los yog nws qhov kev pom los yog qhov kev zam uas nws yuav pov. Kev xyaum ntawm kev txhais ob lossis ntau txoj hauv kev hauv tib chav kawm uas qhia tib lub npe tab sis muaj qhov sib txawv yog hu ua cov txheej txheem overloading
Cov chav kawm twg muaj rau cov tub ntxhais kawm ECE?
Field of Specialization: Biomedical Imaging, Bioengineering, thiab Acoustics. Integrated Circuits. Kev sib txuas lus. Computer Engineering. Tswj. Electromagnetics thiab Remote Sensing. Microelectronics thiab Quantum Electronics. Fais fab thiab Zog Systems
Dab tsi yog ob chav kawm tshwj xeeb hauv hierarchy ntawm Java zam chav kawm?
Chav Kawm Exception muaj ob lub ntsiab subclasses: IOException class thiab RuntimeException Class. Hauv qab no yog cov npe ntawm feem ntau kuaj xyuas thiab tsis tau txheeb xyuas Java's Built-in Exceptions
Peb puas tuaj yeem muaj ntau chav kawm pej xeem hauv chav kawm hauv Java?
Yog, nws ua tau. Txawm li cas los xij, muaj peev xwm tsuas yog ib pawg pej xeem ib. java cov ntaub ntawv, raws li publicclasses yuav tsum muaj tib lub npe raws li cov ntaub ntawv qhov chaw. OneJava cov ntaub ntawv tuaj yeem muaj ntau chav kawm nrog kev txwv uas tsuas yog ib qho ntawm lawv tuaj yeem ua pej xeem
Chav kawm piav qhia txog tus qauv ntawm chav kawm yog dab tsi?
Nyob rau hauv object-oriented programming, ib chav kawm yog ib tug template txhais ntawm txoj kev s thiab txawv txawv s nyob rau hauv ib tug tej yam khoom. Yog li, ib yam khoom yog ib qho piv txwv tshwj xeeb ntawm chav kawm; nws muaj cov txiaj ntsig tiag tiag tsis yog hloov pauv. Cov qauv ntawm ib chav kawm thiab nws cov subclasses yog hu ua chav kawm hierarchy