Koj puas tuaj yeem muaj ntau chav kawm hauv Java cov ntaub ntawv?
Koj puas tuaj yeem muaj ntau chav kawm hauv Java cov ntaub ntawv?

Video: Koj puas tuaj yeem muaj ntau chav kawm hauv Java cov ntaub ntawv?

Video: Koj puas tuaj yeem muaj ntau chav kawm hauv Java cov ntaub ntawv?
Video: Tseem nco thaum kawm ມໍ3 ມໍ4 by Pov Vang: Nkauj tawm tshiab 2018-2019. Full MV 2024, Hlis ntuj nqeg
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Yog, nws ua tau . Txawm li cas los xij, muaj ua tau tsuas yog ua ib pej xeem chav kawm rau. java file , raws li pej xeem chav kawm yuav tsum muaj tib lub npe sourcefile . Ib cov ntaub ntawv Java tuaj yeem ua tau suav nrog ntau chav kawm nrog rau kev txwv uas tsuas yog ib ntawm lawv ua tau ua pej xeem.

Tsis tas li ntawd, peb puas tuaj yeem muaj ntau chav kawm pej xeem hauv ib chav kawm?

Koj tuaj yeem muaj ntau chav kawm hauv ib chav kawm . Lawv hu ua puab Chav kawm es lub cov chav kawm nested . Koj ua tau txawm muaj ntau chav kawm txhais hauv ib qho.java cov ntaub ntawv tsis muaj ib qho nested lwm (muab tias tsuas yog ib qho xwb pej xeem ,vim a pej xeem chav kawm yuav tsum tau tshaj tawm hauv ib daim ntawv teev npe tom qab).

Tsis tas li ntawd, ib chav kawm puas muaj lwm chav kawm hauv Java? Hauv Java , ib yam li cov txheej txheem, hloov pauv ntawm a chav kawm ib yam nkaus ua tau muaj lwm chav kawm raws li nws cov tswv cuab. Sau ntawv a chav kawm hauv lwm tso cai rau hauv Java . Cov chav kawm sau nyob rau hauv yog hu ua nested chav kawm , thiab cov chav kawm uas tuav lub puab chav kawm yog hu ua sab nrauv chav kawm.

Ib yam li ntawd, peb puas tuaj yeem muaj ntau tshaj ib pob nqe lus hauv cov ntaub ntawv?

Nyob ntawd ua tau ua xwb ib pob nqe lus tsis muaj qhov chaw ntaub ntawv , thiab nws siv tau rau txhua hom hauv lub ntaub ntawv . Nco tseg: Yog koj tso ntau hom ib ib leeg qhov chaw ntaub ntawv , xwb ib tau ua pej xeem, thiab nws yuav tsum muaj tib lub npe qhov chaw ntaub ntawv . Txwv tsis pub, cov chav kawm thiab interfaces muaj npe pob khoom.

Koj puas tuaj yeem khaws cov ntaub ntawv Java yam tsis muaj npe?

Yog, nws muaj peev xwm muab sau ua ke ib java source file nrog txawv npe file tab sis koj yuav tsum ua kom paub tseeb tias cov chav kawm uas tau teev tseg hauv yog pej xeem thaum koj compile cov qhov chaw ntaub ntawv cov.class cov ntaub ntawv rau cov chav kawm hauv lub qhov chaw ntaub ntawv tsim tawm.

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