Video: Dab tsi yog qhov zoo ntawm kev sau hauv Java?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov txiaj ntsig ntawm Java Collections Lub moj khaum
Txo cov kev siv zog ua haujlwm: Los ntawm kev muab cov ntaub ntawv muaj txiaj ntsig thiab cov algorithms, cov Kev sau Lub moj khaum tso cai rau koj kom mloog zoo rau qhov tseem ceeb ntawm koj qhov kev zov me nyuam es tsis yog nyob rau theem qis "cov kav dej" yuav tsum ua kom nws ua haujlwm.
Hauv qhov no, vim li cas peb thiaj siv cov khoom sau hauv Java?
Kev sau yog siv yuav luag txhua yam lus programming thiab thaum twg Java tuaj txog, nws kuj tuaj nrog Sau chav kawm. Kev sau yog siv nyob rau hauv cov xwm txheej uas cov ntaub ntawv yog dynamic. Kev sau tso cai ntxiv ib lub caij, rho tawm ib lub caij thiab tus tswv tsev ntawm lwm cov haujlwm. Koj tuaj yeem ua si nrog cov ntaub ntawv qauv thiab algorithms.
Tsis tas li ntawd, txhais li cas los ntawm kev sau hauv Java? Cov Sau hauv Java yog ib lub moj khaum uas muab ib qho kev tsim qauv los khaws thiab tswj cov pab pawg ntawm cov khoom. Java Collections tuaj yeem ua tiav tag nrho cov haujlwm uas koj ua ntawm cov ntaub ntawv xws li tshawb nrhiav, txheeb xyuas, ntxig, tswj, thiab tshem tawm. Java Collection txhais tau tias ib chav tsev ntawm cov khoom.
Tsis tas li ntawd, dab tsi yog qhov txiaj ntsig ntawm generics hauv collections moj khaum?
Java 1.5 tuaj nrog Ntau yam thiab tag nrho sau interfaces thiab kev siv siv nws hnyav heev. Ntau yam cia peb muab hom Object uas a sau tuaj yeem muaj, yog li yog tias koj sim ntxiv cov khoom ntawm lwm hom nws cuam tshuam lub sijhawm yuam kev.
Dab tsi yog qhov txawv ntawm Java sau thiab Java collections?
Cov qhov sib txawv ntawm tus Sau thiab Kev sau muab hauv qab no. Cov Sau yog ib tug interface whereas Kev sau yog chav kawm. Cov Sau interface muab cov qauv kev ua haujlwm ntawm cov ntaub ntawv qauv rau Daim Ntawv Teev Npe, Teeb, thiab Queue. Txawm li cas los xij, Kev sau chav kawm yog txheeb thiab synchronize cov sau cov ntsiab lus.
Pom zoo:
Dab tsi ntawm cov hauv qab no yog qhov zoo ntawm kev siv cov khoom siv pom kev hauv kev hais lus?
Qhov txiaj ntsig tseem ceeb ntawm kev siv cov khoom siv pom hauv koj cov lus hais yog tias lawv ua kom cov neeg tuaj saib muaj kev txaus siab, hloov kev mloog ntawm tus neeg hais lus, thiab ua rau tus neeg hais lus muaj kev ntseeg siab ntau dua hauv kev nthuav qhia tag nrho
Dab tsi yog qhov zoo ntawm txheej txheej rau kev tsim qauv hauv kev khiav hauj lwm qhov system?
Nrog rau txheej txheej, txheej hauv qab yog cov khoom siv kho vajtse, thaum txheej siab tshaj plaws yog cov neeg siv interface. Lub ntsiab kom zoo dua yog simplicity ntawm kev tsim kho thiab debugging. Qhov teeb meem tseem ceeb yog txhais cov txheej txheem ntau yam. Lub ntsiab tsis zoo yog tias OS nyiam ua haujlwm tsawg dua li lwm yam kev siv
Dab tsi yog qhov txawv ntawm kev sib raug zoo unary kev sib raug zoo binary thiab kev sib raug zoo ternary?
Kev sib raug zoo tsis sib xws yog thaum ob tus neeg koom hauv kev sib raug zoo yog tib lub koom haum. Piv txwv li: Cov ncauj lus yuav yog qhov yuav tsum tau ua ua ntej rau lwm yam kev kawm. Kev sib raug zoo ternary yog thaum peb lub koom haum koom nrog kev sib raug zoo
Dab tsi yog qee qhov tsis zoo ntawm lub sijhawm stamping txoj hauv kev rau kev tswj hwm kev sib raug zoo?
Qhov tsis zoo ntawm lub sij hawm stamping mus kom ze yog tias txhua tus nqi khaws cia hauv cov ntaub ntawv yuav tsum muaj ob lub sij hawm thwj ntxiv: ib qho rau lub sijhawm kawg ntawm daim teb tau nyeem thiab ib qho rau qhov hloov tshiab kawg. Lub sij hawm stamping yog li ua rau kom nco xav tau thiab cov ntaub ntawv ua haujlwm nyiaj siv ua haujlwm
Dab tsi yog qhov zoo thiab qhov tsis zoo ntawm kev tshaj xov xwm hauv kev kho mob?
Thaum siv ceev faj, kev tshaj xov xwm tuaj yeem muab cov txiaj ntsig zoo xws li kev sib tham ua haujlwm, kev kawm kho mob, thiab cov neeg mob kev noj qab haus huv. Txawm li cas los xij, thaum siv tsis zoo, kev tshaj xov xwm hauv social media muaj qhov tsis zoo xws li kev ua txhaum ntawm cov neeg mob tsis pub leej twg paub thiab tsis pub leej twg paub thiab tuaj yeem ua rau muaj kev cuam tshuam loj heev