2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Kev txiav txim ntawm kev tua Thaum koj muaj tag nrho peb hauv ib chav kawm, cov blocks zoo li qub raug tua ua ntej, ua raws li tus tsim thiab tom qab ntawd cov txheej txheem piv txwv.
Txoj kev twg yog ua ntej hauv java?
khawm Java pib ua tiav hauv txoj kev tseem ceeb raws li qhia hauv cov cai hauv qab no (public static void main(String args)). Lub cev ntawm txoj kev tseem ceeb yog tag nrho cov cai ntawm thawj { thiab kawg }. Txhua chav kawm hauv Java tuaj yeem muaj txoj hauv kev tseem ceeb.
Kev txiav txim ntawm kev ua tiav hauv java yog dab tsi?
Initialization blocks khiav hauv tib qhov kev txiav txim uas lawv tshwm sim hauv qhov program. Instance Initialization blocks raug tua thaum twg cov chav kawm pibthiab ua ntej cov neeg tsim khoom raug hu. Lawv feem ntau muab tso rau saum cov constructors hauv braces.
Puas yog qhov thaiv zoo li qub raug tua ua ntej Main?
Static Block thiab txoj hauv kev tseem ceeb hauv Java
In Java static block yog siv los pib cov tswv cuab cov ntaub ntawv zoo li qub. Lub ntsiab lus tseem ceeb uas yuav tsum nco ntsoov yog qhov thaiv zoo li qub yog ua ntej txoj hauv kev tseem ceeb thaum lub sijhawm thauj khoom.
Qhov twg yuav ua rau thawj qhov zoo li qub lossis qhov hloov pauv zoo li qub?
Lo lus tseem ceeb zoo li qub yog siv los ua cov khoom tsim ib zaug raws li qhov zoo li qub nyob nco ib zaug thiab yog li synchronization raug tswj hwm rau txhua qhov kev hu. … Static Block is hu ua ntej txawm nws yog sau tom qab lub ntsiab txoj kev. Nws ua pov thawj Static Blocks yog thawj qhovkom tau hu txawm ua ntej txoj kev tseem ceeb.
Pom zoo:
Qhov piv txwv ua ntej ua ntej yog dab tsi?
Thaum lub sijhawm ua ntej ua ntej, cov menyuam yaus kuj tau paub txog kev siv cov cim, raws li pom los ntawm kev nce hauv kev ua si thiab ua txuj ci. 1 Piv txwv li, tus me nyuam siv tau ib yam khoom los sawv cev rau lwm yam, xws li ua piv txwv ib tug broom yog ib tug nees.
Qhov khoom nyob rau pem hauv ntej ntawm lub lens diverging nyob qhov twg?
Teb: Dav hlau daim iav Dav Hlau Daim iav Rau lub teeb rays tawm lub dav hlau daim iav, lub lub kaum sab xis ntawm kev xav sib npaug ntawm lub kaum sab xis ntawm qhov xwm txheej. … Daim duab tsim los ntawm daim iav dav hlau yog ib txwm virtual (lub ntsiab lus tias lub teeb rays tsis yog los ntawm daim duab), upright, thiab ntawm tib lub duab thiab loj npaum li cov khoom nws yog reflecting.
Puas yog pem hauv ntej thiab pem hauv ntej yuav zoo ib yam?
Puas yog cov ntaiv yuav tsum phim rau pem teb saum toj lossis hauv qab? Cov neeg tsim qauv sab hauv thiab cov kws tshaj lij hauv pem teb universally pom zoo rau cov lus teb. Stairs ua ib qho kev hloov ntawm ob lub plag tsev, thiab yog li ntawd, yuav tsum koom tes nrog ob qho tib si hauv pem teb thiab hauv pem teb.
Nyob rau hauv qhov twg ntawm cov xwm txheej hauv qab no thaum kawg thaiv raug tua?
kawg thaiv yog ib txwm ua tom qab tawm hauv cov lus sim. Nyob rau hauv cov ntaub ntawv yog hais tias ib co kev zam tsis tau daws los ntawm tsuas yog thaiv, nws yog rov tsa tom qab ua tiav ntawm thaum kawg thaiv. thaum kawg thaiv yog siv los deallocate cov kev pab cuam.
Qhov twg hauv qab no tshwm sim hauv kev tsim khoom ua ntej?
A. Kev tsim khoom ua ntej yog cov haujlwm ua tiav ntawm cov khoom lag luam, tshwj xeeb tshaj yog cov yeeb yaj kiab lossis kev tshaj tawm xov xwm ua ntej kev tsim tawm tag nrho pib. Cov ntsiab lus ntawm kev tsim yeeb yaj kiab xws li tsab ntawv, kev tsim, kev tshawb nrhiav qhov chaw, khoom siv thiab cov neeg ua haujlwm, thiab cov npe txhaj tshuaj txhua yam tshwm sim thaum tsim ua ntej.
