Video: Puas yog StringUtils Equalsignorecase tsis muaj kev nyab xeeb?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Kev sib piv () txoj hauv kev StringUtils class yog a null - nyab xeeb version ntawm txoj kev sib pivTo() txoj hlua ntawm chav kawm thiab tes null qhov tseem ceeb los ntawm kev xav txog a null tus nqi tsawg dua qhov tsis- null tus nqi. Ob null cov nqi raug suav hais tias yog sib npaug.
Ua raws li qhov no saib, puas yog StringUtils tsis kuaj xyuas rau NULL?
StringUtils . yog Empty () yog siv los nrhiav yog txoj hlua yog loj 0or null . Nws tsis yog xwb kuaj yog txoj hlua yog loj 0or null , tab sis kuj kuaj yog nws yog tsuas yog ib txoj hlua whitespace, piv txwv li "s*".
Qhov thib ob, StringUtils yog dab tsi? StringUtils . The java. lang. String class muaj ib qho kev txwv ntawm txoj hlua hlua kom qhov no yog qhov twg StringUtils los nyob rau hauv. StringUtils muab txoj hauv kev tsis muaj kev nyab xeeb rau kev tuav cov hlua thiab tej zaum yog cov chav kawm siv ntau tshaj plaws hauv Apache Commons qhov project.
Xav txog qhov no, StringUtils yog dab tsi?
StringUtils . EMPTY yog tus tswv cuab zaum kawg ntawm StringUtil chav kawm uas sib npaug rau "" i.e khoob Txoj hlua. isEmpty() Kos seb ib txoj hlua puas yog khoob ("") los yog null.
Kuv yuav siv Apache StringUtils hauv Java li cas?
StringUtils yog chav kawm siv hluav taws xob los ntawm Apache commons-lang (ntau lub tsev qiv ntawv muaj nws tab sis qhov no yog lub tsev qiv ntawv tshaj plaws). Koj yuav tsum rub tawm lub thawv thiab ntxiv rau koj daim ntawv thov classpath. Yog tias koj tab tom tsim rau Android muaj chav kawm TextUtils uas yuav pab tau koj: import hauv xov tooj ntawd.
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