Cov txheej txheem:
Video: Yuav ua li cas koj siv teeb interface hauv Java?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2024-01-18 08:24
Teeb tsa hauv Java
- Teeb yog ib interface uas extends Collection. Nws yog ib qho kev sau cov khoom uas tsis tau txiav txim nyob rau hauv uas duplicate qhov tseem ceeb khaws tsis tau.
- Hauv paus, Teeb yog ua raws los ntawm HashSet , LinkedHashSet lossis TreeSet (tso sawv cev).
- Teeb muaj ntau txoj hauv kev ntxiv, tshem tawm kom meej, loj, thiab lwm yam los txhim kho kev siv ntawm qhov no interface .
Tsis tas li ntawd, dab tsi yog teeb tsa interface hauv Java?
Cov Teeb Interface . A Teeb yog ib qho Collection uas tsis tuaj yeem muaj cov khoom sib npaug. Nws ua qauv lej teeb abstraction. Cov Teeb interface tsuas muaj txoj hauv kev tau txais los ntawm Kev Sau thiab ntxiv cov kev txwv uas txwv tsis pub cov khoom sib npaug.
Tsis tas li ntawd, dab tsi yog qhov interface hauv Java nrog piv txwv? Zoo li chav kawm, ib interface tuaj yeem muaj txoj hauv kev thiab hloov pauv, tab sis cov txheej txheem tau tshaj tawm hauv ib qho interface yog los ntawm default abstract (tsuas yog txoj kev kos npe, tsis muaj lub cev). Interfaces qhia tias chav kawm yuav tsum ua li cas thiab tsis ua li cas. Nws yog lub hom phiaj ntawm chav kawm. A Java tsev qiv ntawv piv txwv yog, Comparator Interface.
Tsis tas li ntawd, peb puas tuaj yeem hloov kho cov khoom teeb tsa hauv Java?
1 Teb. Feem ntau, kev sau nrog qee yam ntawm cov qauv sab hauv tsis saib rau kev hloov pauv hauv lawv cov ntsiab lus, thiab lawv cov qauv yuav raug puas tsuaj yog koj hloov kho cov ntsiab lus (nyob rau hauv txoj kev uas hloov cov cuab yeej uas tus qauv yog raws li). Qhov no tuav rau TreeSet ib yam nkaus.
Dab tsi yog cov chav kawm siv cov npe thiab teeb tsa interface?
2) Sau npe tso cai duplicates thaum Teeb tsis pub cov ntsiab lus duplicate. Tag nrho cov ntsiab lus ntawm a Teeb yuav tsum yog tshwj xeeb yog tias koj sim ntxig lub duplicate keeb nyob rau hauv Teeb nws yuav hloov tus nqi uas twb muaj lawm. 3) Sau npe Kev siv: ArrayList, LinkedList thiab lwm yam. Teeb Kev siv: HashSet, LinkedHashSet, TreeSet thiab lwm yam.
Pom zoo:
Koj yuav txhim kho cov neeg siv interface li cas?
Cov kev coj ua zoo tshaj plaws rau kev tsim ib qho Interface Cia lub interface yooj yim. Tsim kom muaj qhov sib xws thiab siv cov ntsiab lus UI sib xws. Ua lub hom phiaj hauv nplooj ntawv layout. Strategically siv xim thiab kev ntxhib los mos. Siv typography los tsim hierarchy thiab clarity. Nco ntsoov tias lub kaw lus sib txuas lus dab tsi tshwm sim. Xav txog qhov defaults
Txoj kev twg koj yuav tsum override yog tias koj siv lub runnable interface?
Ib chav kawm uas siv Runnable tuaj yeem khiav yam tsis muaj subclassing Xov los ntawm instantiating ib Thread piv txwv thiab dhau nws tus kheej hauv lub hom phiaj. Feem ntau, Runnable interface yuav tsum tau siv yog tias koj tsuas yog npaj los hla txoj kev khiav () thiab tsis muaj lwm txoj hauv kev
Yuav ua li cas koj tuaj yeem teeb koj daim duab hauv xim raws li lub desktop tom qab?
Tom qab teeb tsa lub wallpaper los ntawm MSPaint, koj tseem tuaj yeem nkag mus rau lwm yam kev xaiv los ntawm ControlPanel. Qhib lub Paint menu (sab laug sab laug), thiab xaiv 'Teeb raws li desktop keeb kwm yav dhau' submenu. Nov yog cov kev xaiv los hloov qhov loj me thiab tso koj lub wallpaper: - Sau willshrink lossis resize koj cov duab kom nws npog tag nrho cov duab
Koj ua li cas siv chav kawm paub daws teeb meem hauv Java?
Yog hais tias ib chav kawm tau tshaj tawm tias abstract, nws tsis tuaj yeem instantiated. Txhawm rau siv cov chav kawm paub daws teeb meem, koj yuav tsum tau txais nws los ntawm lwm chav kawm, muab kev siv rau cov kev paub daws teeb meem hauv nws. Yog tias koj tau txais ib chav kawm paub daws teeb meem, koj yuav tsum muab cov kev siv rau txhua txoj kev paub daws teeb meem hauv nws
Koj siv dab tsi los teeb tsa Git repository hauv koj daim nplaub tshev?
Pib qhov tshiab git repository Tsim ib phau ntawv kom muaj qhov project. Nkag mus rau hauv phau ntawv teev npe tshiab. Ntaus git init. Sau qee tus lej. Ntaus git ntxiv rau ntxiv cov ntaub ntawv (saib nplooj ntawv siv ib txwm). Ntaus git commit