Cov txheej txheem:

Koj siv copyOf array li cas?
Koj siv copyOf array li cas?

Video: Koj siv copyOf array li cas?

Video: Koj siv copyOf array li cas?
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siv. Arrays . copyOf (int original, int newLength) txoj kev theej qhov teev tseg array , truncating los yog padding nrog xoom (yog tias tsim nyog) yog li cov luam muaj qhov ntev ntev. Rau txhua qhov ntsuas uas siv tau hauv ob qho tib si thawj array thiab cov luam , ob arrays yuav muaj cov txiaj ntsig zoo ib yam.

Tsis tas li ntawd, koj yuav muab ib qho array rau lwm qhov array li cas?

Txhawm rau muab ib qho array rau lwm qhov array

  1. Xyuas kom meej tias ob lub arrays muaj tib qib (tus naj npawb ntawm qhov ntev) thiab sib haum cov ntaub ntawv hom.
  2. Siv daim ntawv teev cov txheej txheem los muab qhov chaw array rau qhov chaw array. Tsis txhob ua raws ob lub npe array nrog cov kab lus.

Tsis tas li ntawd, dab tsi yog clone array hauv Java? Java Arrays : Cloning thiab Shallow Luam Arrays hauv Java yog khoom; yog li ntawd lawv tau txais tag nrho cov yam ntxwv ntawm java ua . lang. Yam khoom. Ib array hom muaj txoj hauv kev rau pej xeem clone (), uas overrides lub clone () method of class Object. Cov clone method of ib array hom rov ua dua luam ntawm tib yam array.

Tsis tas li ntawd, ua li cas koj ua ib daim ntawv sib sib zog nqus ntawm ib qho array?

Yog koj xav tau ua ib daim ntawv sib sib zog nqus , koj yuav tsum siv tshiab rau tsim ib qho piv txwv tshiab ntawm txhua yam khoom hauv array . Koj yuav xav tau ua a luam constructor rau Position (nyob rau hauv lwm yam lus, ib tug constructor rau txoj hauj lwm uas yuav siv sij hawm nyob rau hauv lwm txoj hauj lwm thiab cov ntawv luam cov ntaub ntawv tseem ceeb hauv nws) thiab hais cov ntaub ntawv = Tshiab Txoj Haujlwm (lwm yam.

Yuav ua li cas koj resize ib array hauv Java?

Ib qho array tsis tuaj yeem hloov pauv dynamically hauv Java

  1. Ib txoj hauv kev yog siv java. siv. ArrayList(los yog java. util. Vector) es tsis txhob ntawm ib txwm array.
  2. Lwm txoj hauv kev yog rov faib cov array nrog qhov sib txawv thiab luam cov ntsiab lus ntawm cov qub array mus rau qhov tshiab array.

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