Chirongwa wokutanga Java - Hello World

Munzvimbo huchangotanga kudzidza mutauro akaita chikumbiro chacho kutanga kwazisai nyika. Pasinei nokuti zvakananga kwezvakatipoteredza, mutsara pacharo somugumisiro munhu Hello World chirongwa, ndiye kutanga kwekupwanyiwa kukura. Kutevedzera ndiye muenzaniso nyore kushanda muna Java.

Gadzirira kuvaka chikumbiro chako chekutanga

Usati sika rako Hello World muna Java, unofanira kudhanilodha uye kuisa software. Chinhu chokutanga uchada, - JDK. Izvi iine yokuvaka Ezvemutauro. Zviri chinodiwa kukopa kubva pamutemo Website wekambani Oracle. Ichangobva shanduro Java nhasi - 8. Developer Toolkit inowanika kuritora uye kugadzwa hunenge zvose anozivikanwa platforms.

Zvadaro pane kusarudza kushandisa chero ari Ide, ndiro kukura zvakatipoteredza, somuenzaniso, Kuro uye NetBeans, kana kunyora bumbiro chero chinyorwa mupepeti. Kuti zvive nyore, munyaya achashandisa nyore nzira - kushandisa nebhuku rokunyorera.

Hello World muna Java kushandisa nyore chinyorwa mupepeti

Zvinofungirwa kuti hurongwa yave yakaiswa JDK. Zvino unofanira kumhanya zvikuru vanhuwo notibhuku muna Windows kana gedit kana Nano kuti Linux. Zvinokwanisika zvakananga kuponesa, zita faira Somuenzaniso HelloWorld.java. Zvadaro, muna chinyorwa mumunda, kupinda zvishomanana mitsetse code:

Kirasi HelloWorld {

}

Kouya kutumidza mukirasi. The Java mutauro zvinodiwa, anofanira kunzi zvakafanana faira pacharo, iro. Next pakauya kufamba ndakaisa simbi mumakumbo, Java nemarongerwo zvinhu ichitoratidza apo kirasi inotanga uye miromo. Inside zviri ikozvino zvakakodzera kutsanangura nzira kuti zvichava chinhu kuita:

Kirasi HelloWorld {

paruzhinji kunofambira mberi anoshayiwa chikuru (String [] args) {

}

}

Zviri nzira huru kunouya kushanda chero chirongwa Java. Keyword paruzhinji - kuwana modifier achiratidza kuti ruzhinji uye kunogona kushandiswa kwese. Kuti udzidze zvokuita nayo, zvinogona kuwanikwa mubhuku renhoroondo mapepa mutauro.

Next ndiko kunofambira mberi, izvo zvinoreva kuti kunofambira mberi nzira, kuti hakuna vakasikwa kudanwa, uye pakutanga chirongwa. The guru maturo rinoratidza kuti huru harizodzoki chero data, asi chete chinhu kuita.

Tambo uye zviratidzo muzvikomberedzo [] dzinoratidza kuti nzira inogona kutora mamwe chiyamuro tsika, semuenzaniso, kuti tevera kugadzira. A shanduka zita args inopa mukana kushandisa nokuti kune umboo mukati nzira. Zvinokosha kucherechedza kuti huru, seboka, iri nenzwi kufamba ndakaisa simbi mumakumbo, kuratidza ndima "yavo".

Zvakanaka, zvino zvazvinosarira kuwedzera imwe nzira kuratidza migumisiro chirongwa basa:

Kirasi HelloWorld {

paruzhinji kunofambira mberi anoshayiwa chikuru (String [] args) {

System.out.println ( «! Hello World»);

}

}

murayiro uyu anongoti anoratidza tambo iri mumabhuraketi pamadziro. Panoperera mashoko anoshandiswa pedyo semicolon. Saka muna Java inoratidza kuguma kutaura kana dzinza remitemo. The ukoshi kuti goho somugumisiro anongotaurwa.

Kumhanya uye achiedza rokutanga kushanda

Kumhanya kwaizoita Hello World muna Java, unofanira kuenda kunyaradzana. In Windows, inonzi murayiro mutsetse, uye kuna Linux - inouraya. Kamwe ari kunyaradza, unofanira kuenda kuponeswa kare faira HelloWorld.java. Somuenzaniso, muna Windows, zvinogonawo nzira C: \ Java \ Hello. Zvadaro nyore kupinda kunyaradzana murayiro CD C: \ Java \ Hello. Nomugungwa kuti forodha pamwe chirongwa faira, unofanira kutanga exchange kuti bytecode. Kuti aite izvi, kushandisa inotevera mamiriro:

javac HelloWorld.java

Pashure paizvozvo unofanira kumhanya kunoguma kirasi kuurayiwa. Nokuti ichi, zvakare, pane yoga chikwata:

Java HelloWorld.

On the kunyaradzana chidzitiro vanofanira kuonekwa Mugumisiro Hello World musi Java - kukwazisa kwenyika.

mhedziso

Zvirongwa Java - a anonakidza uye anobatsira muviri. Kuchikuva kugona kumhanya dzakasiyana-siyana mano - kubva nyore maserura kune hombe Server zvechitima. Vazhinji guru Internet nezvikumbaridzo sechinhu chikuru Chikuva Java inoshandiswa ironge Server zvikumbiro. Sezvazvakanyorwa muna code, uye kuti iye zvino akakurumbira Android uchishandisa hurongwa. Uye pamwechete muitiro okukura, kufanana naye, muna Java ane ramangwana kukuru.