Video: Vim li cas peb thiaj siv TreeMap hauv Java?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov TreeMap hauv Java yog siv los siv Daim Ntawv Qhia interface thiab NavigableMap nrog rau Chav Kawm Abstract. Daim ntawv qhia yog txheeb raws li qhov kev txiav txim ntawm nws cov yuam sij, lossis los ntawm tus Sib piv muab rau lub sijhawm tsim daim ntawv qhia, nyob ntawm seb tus tsim qauv twg yog siv.
Cov lus nug tseem yog, TreeMap ua haujlwm li cas?
TreeMap hauv Java. Cov TreeMap yog siv los siv Map interface thiab NavigableMap nrog rau Chav Kawm Abstract. Tsis tas li ntawd, tag nrho nws cov khoom khaws cia hauv lub TreeMap raug txheeb los ntawm qhov tseem ceeb. TreeMap ua sorting nyob rau hauv tej yam ntuj tso kev txiav txim ntawm nws tus yuam sij, nws kuj tso cai rau koj siv Comparator rau kev cai sorting siv.
Ib yam li ntawd, vim li cas HashMap sai dua TreeMap? Nws muab kev ua haujlwm ntawm O (1), thaum TreeMap muab kev ua haujlwm ntawm O(log(n)) ntxiv, tshawb nrhiav, thiab tshem tawm cov khoom. Vim li no, HashMap feem ntau yog sai dua . A TreeMap siv txoj kev nco zoo dua yog li nws yog qhov kev siv Daim Ntawv Qhia zoo rau koj yog tias koj tsis paub meej txog cov ntsiab lus kom muaj nuj nqis uas yuav tsum tau khaws cia hauv lub cim xeeb.
Tib neeg kuj nug, TreeMap puas siv hashing?
TreeMap yog qeeb hauv kev sib piv rau HashMap vim nws muab kev ua haujlwm ntawm O(log(n)) rau feem ntau cov haujlwm xws li add(), tshem tawm() thiab muaj(). HashMap chav kawm siv tus hash rooj. TreeMap sab hauv siv ib tsob ntoo Liab-Dub, uas yog tus kheej ntsuas Binary Nrhiav tsob ntoo. Txoj kev sib npaug () ntawm daim ntawv qhia chav kawm overrides nws.
Puas yog TreeMap txheeb tau?
Cov ntaub ntawv hauv a TreeMap yog ib txwm txheeb raws li kev txiav txim ntawm ntuj tsim cov yuam sij, lossis raws li kev cai sib piv uas koj tuaj yeem muab tau thaum lub sijhawm tsim cov TreeMap . TreeMap tsis tuaj yeem muaj tus yuam sij null. Txawm li cas los xij, Nws tuaj yeem muaj nuj nqis null. TreeMap tsis synchronized.
Pom zoo:
Vim li cas peb thiaj siv JSX hauv react JS?
JSX yog qhov txuas ntxiv rau ReactJS uas ntxiv kev txhawb nqa rau kev sau HTML cim npe hauv JavaScript. Nyob rau sab saum toj ntawm ReactJS, nws tsim txoj hauv kev muaj zog heev los nthuav qhia lub vev xaib thov. Yog tias koj paub txog ReactJS, koj paub tias nws yog lub tsev qiv ntawv rau kev siv lub vev xaib raws li cov ntawv thov hauv ntej
Vim li cas peb thiaj siv daim ntawv ua hauv HTML?
HTML | action Attribute yog siv los qhia qhov twg cov formdata raug xa mus rau lub server tom qab xa daim ntawv. Nws tuaj yeem siv rau hauv lub caij. Tus nqi tsim nyog: URL: Nws yog siv los qhia qhov URL ntawm cov ntaub ntawv uas cov ntaub ntawv xa tuaj tom qab xa daim ntawv
Vim li cas peb thiaj li siv cov peev txheej hauv AngularJS?
Scopes muab APIs ($ thov) kom tshaj tawm cov qauv hloov pauv los ntawm lub kaw lus mus rau hauv kev pom los ntawm sab nraud ntawm 'AngularJS realm' (tswj, cov kev pabcuam, AngularJS cov neeg tuav haujlwm). Scopes tuaj yeem ua zes kom txwv kev nkag mus rau cov khoom ntawm daim ntawv thov cov khoom thaum muab kev nkag mus rau cov qauv sib koom
Vim li cas peb thiaj siv tshaj tawm hauv Ethernet?
Ethernet thav duab uas muaj IP tshaj tawm cov pob khoom feem ntau raug xa mus rau qhov chaw nyob no. Ethernetbroadcasts yog siv los ntawm Chaw Nyob Resolution Protocol thiab NeighborDiscovery Protocol los txhais IP chaw nyob rau MACaddresses
Vim li cas peb thiaj siv @override hauv Java?
Cov lus piav qhia @Override yog siv los pab xyuas seb tus tsim tawm dab tsi los hla txoj kev raug nyob rau hauv cov chav kawm niam txiv lossis qhov cuam tshuam. Thaum lub npe ntawm super txoj kev hloov, lub compiler tuaj yeem ceeb toom cov ntaub ntawv, uas tsuas yog ua kom sib xws nrog cov super thiab subclass