Video: Scanner input tshiab scanner system txhais li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Scanner tswv yim = tshiab Scanner ( Qhov system .in); Tsim ib tshiab hom khoom Lub tshuab luam ntawv los ntawm tus qauv nkag ntawm qhov kev pab cuam (qhov no tej zaum lub console) thiab int i = nkag . nextInt() siv cov nextIntMethod ntawm cov khoom ntawd, uas tso cai rau koj nkag mus rau qee cov ntawv nyeem thiab nws yuav muab parsed rau hauv ib tug integer.
Hauv qhov no, dab tsi yog scanner hauv cov tshuab scanner tshiab hauv?
Teb rau lub Plaub Hlis 15, 2015. Cia nws tawg. Lub tshuab luam ntawv : Cov Lub tshuab luam ntawv chav kawm yog chav kawm hauv java.util, uas tso cai rau tus neeg siv los nyeem cov txiaj ntsig ntawm ntau hom. Qhov system .in: Ib qho InputStream uas feem ntau txuas nrog tokeyboard input ntawm console program. Lub tshuab luam ntawv S = tshiabScanner ( Qhov system .in)
Tsis tas li ntawd, kuv yuav nyeem tus cim scanner li cas? Tsis muaj API txoj hauv kev kom tau txais a tus cwj pwm los ntawm Lub tshuab luam ntawv . Koj yuav tsum tau txais txoj hlua siv scanner .next() thiab invoke String.charAt(0) txoj hauv kev ntawm txoj hlua xa rov qab. Lub tshuab luam ntawv nyeem = new Lub tshuab luam ntawv (System.in); char c =reader.next().charAt(0);
Tsuas yog li ntawd, vim li cas qhov system hauv siv hauv chav kawm scanner?
Lub tshuab luam ntawv yog a chav kawm hauv java.util pob siv kom tau txais cov tswv yim ntawm cov hom qub liint, ob npaug, thiab lwm yam. Nws yog txoj hauv kev yooj yim tshaj plaws los nyeem inputin Java program, txawm hais tias tsis muaj txiaj ntsig zoo yog tias koj xav tau kev nkag mus rau cov xwm txheej uas lub sijhawm muaj kev txwv zoo li hauv kev sib tw programming.
Lub ntsiab lus ntawm import Java Util scanner yog dab tsi?
Hauv java ua , rau importing ib chav kawm lossis tus txheej txheem cov ntaub ntawv los ntawm lwm lub pob uas nws tau hais ua ntej, peb siv IMPORT lo lus tseem ceeb. yog li ntawd JAVA . UTIL . SCANNER txhais tau tias koj xav tau tshuab luam ntawv txoj kev los ntawm kev siv hluav taws xob uas muaj cov chav kawm ua ntej tau teev tseg. Cov SCANNER yog siv los muab tswv yim los ntawm tus neeg siv.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm kev rov ua dua tshiab thiab kev kho dua tshiab?
Kev piav qhia ntxaws ntxaws yog qhov txheej txheem nco uas suav nrog kev xav txog lub ntsiab lus ntawm lub ntsiab lus uas yuav tsum nco ntsoov, sib piv nrog cov txheej txheem ntawm kev rov hais dua cov lus rau tus kheej ntau dua. Kev saib xyuas kev kho mob yog cov txheej txheem ntawm kev rov xav txog lossis hais lus ib yam ntawm cov ntaub ntawv
Dab tsi yog cov khoom siv hluav taws xob tshiab tshiab?
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Nws txhais li cas yog tias lub console raug kho dua tshiab?
Lub console refurbished yog ib qho uas tau siv thiab tau muag rov qab rau tus neeg muag khoom los ntawm cov neeg siv khoom. Nws yuav zoo li tau dhau qee qhov kev kuaj xyuas kom paub tseeb tias nws ua haujlwm, tab sis tej zaum yuav tsis tau raug kuaj xyuas lossis kho kom zoo li chav tsev kho mob