Video: Koj hloov cov ntawv hauv Java li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Txoj hlua yog immutable nyob rau hauv Java . Koj ua tsis tau hloov lawv. Koj yuav tsum tsim ib txoj hlua tshiab nrog rau tus cwj pwm hloov. Tig txoj hlua rau hauv a char , hloov cov tsab ntawv los ntawm index, ces hloov cov array rov qab rau hauv ib txoj hlua.
Ua raws li qhov no, koj yuav hloov qhov ntsuas ntawm ib txoj hlua hauv Java li cas?
Siv toCharArray() Lwm txoj kev plausible ntawm hloov tus cwj pwm ntawm qhov teev tseg qhov ntsuas hauv a Txoj hlua yog siv cov cim array uas tuaj yeem hloov kho tau yooj yim. Lub tswv yim yog los hloov cov muab txoj hlua rau cov cim array siv nws txoj kev rauCharArray() thiab tom qab ntawd hloov tus cwj pwm ntawm muab qhov ntsuas nyob rau hauv lub cim array.
Tsis tas li ntawd, koj yuav ua li cas hloov cov cim thawj thiab zaum kawg hauv txoj hlua? Noj cov ua ntej element thiab khaws cia rau hauv a char , sib pauv tus ua ntej element nrog lub kawg , thiab muab cov khoom koj khaws cia rau hauv a char mus rau hauv kawg element rau hauv array, ces hais tias: Txoj hlua temp = new Txoj hlua (charArray); thiab rov qab los. Qhov no yog xav tias charArray yog koj cov array ntawm chars.
Hauv qhov no, yuav ua li cas koj hloov thawj tus cim ntawm txoj hlua hauv Java?
12 Teb. Siv lub substring() muaj nuj nqi nrog kev sib cav ntawm 1 kom tau cov substring los ntawm txoj hauj lwm 1 (tom qab lub thawj tus cim ) mus rau qhov kawg txoj hlua (tso tawm qhov kev sib cav thib ob tawm defaults mus rau tag nrho ntev ntawm qhov txoj hlua ). Siv substring() thiab muab tus lej ntawm cov cim uas koj xav txiav los ntawm pem hauv ntej.
Yuav ua li cas tshem tawm ib tsab ntawv los ntawm ib txoj hlua hauv Java?
Koj tuaj yeem siv txoj kev substring() ntawm java ua . lang. Txoj hlua chav rau tshem tawm thawj lossis kawg tus cwj pwm ntawm String hauv Java . Txoj kev substring() yog overloaded thiab muab ob peb versions uas tso cai rau koj mus tshem tus cim los ntawm txhua txoj haujlwm hauv Java.
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