I-Java environment variable iyisici esibalulekile sokusebenza nalolu limi lokuhlela kukhompuyutha yakho. Uma ingalungiselelwe kahle, kungaba nzima ukuhlanganisa noma ukusebenzisa izinhlelo ze-Java. Kulesi sifundo, sizokukhombisa ukuthi ungamisa kanjani kalula ukuhluka kwemvelo ye-Java kusistimu yakho yokusebenza ukuze uqale ukusebenza ngalolu limi ngaphandle kwezinkinga.
Ukuthuthukisa Ukusetshenziswa kwe-Java: Umhlahlandlela Wokusetha Okuguquguqukayo Kwendawo
I-Java iwulimi lokuhlela oluthandwa kakhulu olusetshenziswa ezinhlelweni eziningi ezahlukahlukene. Ukuze usebenzise i-Java kukhompyutha yakho, udinga ukusetha ukuguquguquka kwemvelo ngendlela efanele. Kulesi sihloko, sizokukhombisa ukuthi ungakwenza kanjani lokhu kalula.
Kuyini ukuguquguquka kwemvelo?
Okuguquguqukayo kwemvelo kungukuguquguquka kwesistimu okuvumela izinhlelo ukuthi zifinyelele imizila ethile nezinkomba ngokushesha futhi kalula. Ku-Java, ukusetha okuguquguqukayo kwendawo kuyadingeka ukuze uhlanganise futhi uqalise izinhlelo.
Isinyathelo 1: Landa futhi ufake i-Java
Ngaphambi kokusetha okuguquguqukayo kwemvelo, udinga ukulanda futhi ufake i-Java kukhompyutha yakho. Ungalanda inguqulo yakamuva ye-Java kuwebhusayithi esemthethweni ye-Oracle.
Isinyathelo sesi-2: Lungiselela ukuguquguquka kwemvelo
Ukusetha ukuguquguquka kwemvelo ku-Windows, landela lezi zinyathelo:
1. Chofoza inkinobho ethi Qala bese uthayipha “Okuguquguqukayo Kwendawo” kubha yokusesha.
2. Khetha "Hlela okuguquguqukayo kwemvelo yesistimu."
3. Chofoza inkinobho ethi “Okuguquguqukayo Kwendawo”.
4. Esigabeni esithi “Okuguquguqukayo Kwesistimu,” thola okuguquguqukayo kokuthi “Indlela” bese uyikhetha.
5. Chofoza inkinobho ethi "Hlela".
6. Engeza indlela yokufaka i-Java ekupheleni komugqa. Indlela ingase yehluke kuye ngenguqulo ye-Java oyifakile, kodwa ngokuvamile itholakala kokuthi "C:\Program Files\Java\jdk1.8.0_221\bin."
7. Chofoza "KULUNGILE" ukuze ulondoloze izinguquko.
Isiphetho
Ukusetha okuguquguqukayo kwemvelo ku-Java kuyisinyathelo esibalulekile sokusebenzisa lolu limi lokuhlela kukhompuyutha yakho. Ngokulandela izinyathelo ezishiwo ngenhla, ungakwenza lokhu ngokushesha futhi kalula. Manje usukulungele ukuqala ukuhlela ku-Java!
Lungiselela indawo yakho yokuthuthuka ngezilungiselelo ezifanele eziguquguqukayo
Ukumisa kahle okuguquguqukayo kwendawo kusistimu yethu kubalulekile ekuthuthukisweni kohlelo lokusebenza ngempumelelo. Kulesi sihloko, sizokufundisa ukuthi ungamisa kanjani okuguquguqukayo kwemvelo ku-Java.
Okokuqala, kubalulekile ukuqonda ukuthi yini i-variable yemvelo. Ngokuyisisekelo, okuguquguqukayo kwemvelo kuwukuguquguquka komhlaba wonke okungasetshenziswa yinoma iyiphi inqubo ohlelweni lwethu lokusebenza. Esimeni se-Java, okuguquguquka kwemvelo okudingeka sikusethe "JAVA_HOME." Lokhu okuguquguqukayo kukhomba kumkhombandlela wezimpande ze-Java ohlelweni lwethu.
Ukuze ulungiselele lokhu okuguquguqukayo ku-Windows, landela lezi zinyathelo:
Isinyathelo 1: Vula imenyu ethi Qala bese usesha "Iziguquguquko Zemvelo".
Isinyathelo 2: Chofoza ku-"Hlela iziguquguquko zemvelo yesistimu".
Isinyathelo 3: Chofoza ku-"Iziguquguquko Zemvelo".
Isinyathelo 4: Esigabeni esithi "Iziguquguquko Zesistimu", chofoza okuthi "Okusha".
Isinyathelo 5: Ensimini ethi "Igama eliguquguqukayo", thayipha "JAVA_HOME".
Isinyathelo 6: Ensimini ethi "Inani eliguquguqukayo", faka indlela ephelele eya kufolda yezimpande ze-Java ohlelweni lwakho. Isibonelo, "C:\Program Files\Java\jdk\1.8.0_221".
Isinyathelo 7: Chofoza okuthi "Yamukela" ukuze ulondoloze izinguquko.
Ngalezi zinyathelo ezilula, silungiselele ukuguquguquka kwemvelo ye-Java kusistimu yethu. Manje, noma iyiphi inqubo edinga i-Java ingafinyelela lokhu okuguquguqukayo futhi isebenzise ukufakwa kwe-Java esikushilo.
Esimeni se-Java, i-"JAVA_HOME" eguquguqukayo yemvelo ibalulekile ukuze kuqinisekiswe ukuthi ukufaka kwethu i-Java kusetshenziswa kahle isistimu yethu. Ngezinyathelo ezichazwe kulesi sihloko, ungakwazi ukumisa lokhu okuguquguqukayo ngokushesha futhi kalula.
Ukusetha Indlela Ye-Java Kusistimu Yakho Yokusebenza: Uyithola Kanjani Futhi Uyisethe i-JAVA_HOME
I-Java ingenye yezilimi zokuhlela ezidumile kakhulu emhlabeni wezobuchwepheshe. Uma ungumhleli wezinhlelo, cishe kuzodingeka usebenzise lolu limi kumaphrojekthi akho. Ukuze wenze kanjalo, udinga ukumisa indlela ye-Java ohlelweni lwakho lokusebenza. Kulesi sihloko, sizokukhombisa ukuthi ungayithola kanjani futhi uyisethe kanjani i-JAVA_HOME kukhompyutha yakho.
Isinyathelo 1: Hlola ukuthi i-Java ifakiwe yini kukhompyutha yakho
Ngaphambi kokulungiselela indlela ye-Java, kufanele uqinisekise ukuthi ulimi lufakiwe yini kukhompyutha yakho. Ukuze wenze lokhu, vula umyalo bese uthayipha okuthi `java -version` . Uma i-Java ifakiwe, inguqulo yolimi izoboniswa. Uma ingafakiwe, kuzodingeka uyilande bese uyifaka kukhompyutha yakho ngaphambi kokuqhubeka.
Isinyathelo sesi-2: Thola indawo ye-Java kukhompyutha yakho
Uma usuqinisekisile ukuthi i-Java ifakiwe, udinga ukuthola indawo yefolda esebenzisekayo ye-Java. Ukuze wenze lokhu, vula umyalo bese uthayipha okuthi ` lapho i-java` ku-Windows noma okuthi ` which java` ku-Linux noma ku-Mac. Lokhu kuzokukhombisa indlela eya kufolda lapho i-Java esebenzisekayo itholakala khona.
Isinyathelo sesi-3: Setha i-JAVA_HOME imvelo eguquguqukayo
Uma usuyitholile i-Java kukhompyutha yakho, kufanele usethe i- JAVA_HOME environment variable . Le nguqulo iyadingeka ukuze uhlelo lokusebenza luthole i-Java futhi lusebenzise amathuluzi alo. Ukuze usethe i-variable, landela lezi zinyathelo:
- Vula iwindi Lokucushwa Kwesistimu (ku-Windows) noma Itheminali (ku-Linux/Mac).
- Bhala setx -m JAVA_HOME «java_path» ku-Windows noma thekelisa i-JAVA_HOME=»java_path» ku-Linux/Mac.
- Faka esikhundleni “i-java_path” ngendlela yefolda lapho okuphunyeleliswayo kwe-Java kutholakala khona.
Isinyathelo sesi-4: Hlola ukuthi i-variable yemvelo isethwe ngendlela efanele yini
Uma usuyimisile i- JAVA_HOME environment variable , kufanele uqinisekise ukuthi ilungiselelwe kahle. Ukuze wenze lokhu, vula umyalo bese uthayipha ` echo %JAVA_HOME%` ku-Windows noma `echo $JAVA_HOME` ku-Linux/Mac. Uma indlela eya kufolda lapho i-Java executable itholakala khona iboniswa, khona-ke i-environment variable ilungiselelwe kahle.
Ngokulandela lezi zinyathelo ezilula, uzokwazi ukusetha i- JAVA_HOME environment variable bese usebenzisa amathuluzi e-Java kukhompyutha yakho.
Ukuhlola Ukubaluleka Kwezinto Eziguquguqukayo Zemvelo ku-Java
Okuguquguqukayo kwemvelo kuyingxenye ebalulekile yokuthuthukiswa kohlelo lokusebenza lwe-Java. Lokhu okuguquguqukayo kukuvumela ukuthi usethe ukucushwa okuqondile kwendawo yakho yokuthuthuka, okungaba usizo kakhulu ezimeni ezahlukahlukene.
Okuguquguqukayo kwemvelo kuqukethe igama kanye nenani. Igama lisetshenziselwa ukukhomba okuhlukile, kuyilapho inani lisetshenziselwa ukugcina ulwazi oluthile. Ku-Java, okuguquguqukayo kwemvelo kubaluleke kakhulu ekusunguleni indlela yokufinyelela ku-JVM (Java Virtual Machine).
Kungani kubalulekile ukusetha okuguquguqukayo kwemvelo kwe-Java?
Ukusetha okuguquguqukayo kwemvelo ye-Java kubalulekile ngoba kuvumela isistimu yokusebenza ukuthi ithole i-JVM. Lokhu kubalulekile ukuze izinhlelo zokusebenza ze-Java zisebenze kahle ohlelweni. Uma indlela eya ku-JVM ingasethiwe kahle, izinhlelo zokusebenza ze-Java kungenzeka zehluleke.
Ungasetha kanjani ukuguquguquka kwemvelo ku-Java?
Ukusetha i-variable yemvelo ye-Java kuyinqubo eqondile. Okokuqala, udinga ukukhomba indlela eya ku-JVM ohlelweni lwakho. Le ndlela ingase yehluke kuye ngesistimu yokusebenza oyisebenzisayo. Uma indlela isikhonjiwe, kufanele usethe i-JAVA_HOME imvelo eguquguqukayo ohlelweni lwakho.
Ukusetha ukuguquguquka kwemvelo ku-Windows, landela lezi zinyathelo:
1. Vula imenyu yokuqala bese usesha “Okuguquguqukayo Kwemvelo.”
2. Khetha "Hlela okuguquguqukayo kwemvelo yesistimu."
3. Chofoza inkinobho ethi “Okuguquguqukayo Kwendawo”.
4. Esigabeni esithi “Okuguquguqukayo Kwesistimu,” thola okuguquguqukayo kwe-JAVA_HOME.
5. Uma okuguquguqukayo kungekho, chofoza okuthi “Okusha” bese udala okuguquguqukayo okusha okuthiwa JAVA_HOME ngendlela eya ku-JVM.
6. Uma okuguquguqukayo sekuvele kukhona, chofoza "Hlela" futhi ubuyekeze indlela ye-JVM.
Ukusetha ukuguquguquka kwemvelo ku-Linux noma ku-macOS, landela lezi zinyathelo:
1. Vula itheminali.
2. Qalisa umyalo olandelayo:
thekelisa i-JAVA_HOME=/path/to/the/JVM
3. Qinisekisa ukuthi okuguquguqukayo kusethwe ngendlela efanele ngokusebenzisa umyalo olandelayo:
beka i-$ JAVA_HOME
Isiphetho
Ukulungisa okuguquguqukayo kwemvelo ye-Java kubalulekile ukuze izinhlelo ze-Java zisebenze kahle ohlelweni. Ukulungisa indlela ye-JVM kubalulekile ukuze isistimu yokusebenza ithole i-JVM. Ukulandela inqubo efanele yokumisa kungavimbela izinkinga zesikhathi sokusebenza futhi kuqinisekise ukusebenza kahle kwezinhlelo zokusebenza ze-Java.