In java kawg lo lus tseem ceeb siv nrog?

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In java kawg lo lus tseem ceeb siv nrog?
In java kawg lo lus tseem ceeb siv nrog?
Anonim

Java kawg lo lus tseem ceeb yog qhov tsis nkag mus rau qhov tshwj xeeb uas siv txwv tsis pub cov chav kawm, hloov pauv, thiab txoj hauv kev. Yog tias peb pib qhov sib txawv nrog lo lus tseem ceeb kawg, peb tsis tuaj yeem hloov kho nws tus nqi. Yog tias peb tshaj tawm txoj hauv kev ua qhov kawg, ces nws tsis tuaj yeem hla dhau los ntawm ib qho subclasses.

Dab tsi yog 3 qhov kev siv ntawm lo lus kawg hauv Java?

Dab tsi yog siv cov lus tseem ceeb kawg hauv Java? Lo lus tseem ceeb kawg hauv Java muaj peb yam kev siv: tsim qhov tsis tu ncua, tiv thaiv kev qub txeeg qub teg thiab tiv thaiv txoj hauv kev los ntawm kev hla dhau.

Vim li cas lo lus tseem ceeb kawg siv hauv Java piav qhia nrog piv txwv?

Nyob hauv Java, lo lus tseem ceeb kawg yog siv los qhia qhov tsis tu ncua. Nws tuaj yeem siv nrog kev hloov pauv, txoj hauv kev, thiab cov chav kawm. Thaum txhua qhov chaw (kuj sib txawv, txoj hauv kev lossis chav kawm) tau tshaj tawm qhov kawg, nws tuaj yeem raug muab tso rau ib zaug xwb.

Peb puas tuaj yeem siv lo lus kawg nrog tus tsim?

Tsis yog, tus tsim ua tsis tuaj yeem ua tiav. Ib txoj hauv kev kawg tsis tuaj yeem hla dhau los ntawm ib qho subclasses. … Nyob rau hauv lwm yam lus, constructors tsis tuaj yeem tau txais qub txeeg qub teg hauv Java yog li ntawd, tsis tas yuav tsum sau ntawv kawg ua ntej tus tsim. Yog li ntawd, java tsis tso cai lo lus tseem ceeb kawg ua ntej tus tsim.

lo lus tseem ceeb kawg hauv Java muab piv txwv yog dab tsi?

Thaum ib chav kawm tau tshaj tawm nrog lo lus kawg, nws hu ua chav kawg. Ib chav kawm kawg tsis tuaj yeem txuas ntxiv (kwv yees). Muaj ob qhov kev siv ntawm chav kawm kawg: Ib qho yog qhov tseeb los tiv thaiv kev qub txeeg qub teg, vim cov chav kawm zaum kawg tsis tuaj yeem txuas ntxiv. RauPiv txwv li, tag nrho cov chav kawm Wrapper zoo li Integer, Float thiab lwm yam.

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