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ӋC(j)ԇjava֪Rc

rg2025-10-02 21:54:52 javaZ

ӋC(j)ԇjava֪Rc

ʮּʲôʹ҂ڱǰÓf?֪RnjW(xu)(x)ǰٷ־W(wng)СӋC(j)ԇjava֪RcgӭW(xu)(x)!

ӋC(j)ԇjava֪Rc

cһU(ku)չӋƽ_

1.2.5 javaƽ_-U(ku)չӋƽ_

javaHǾZ߀һ_l(f)ƽ_javag(sh)oTṩS๤ߣgęnļߵȵȡͬrjava߀һl(f)ƽ_ЃɷNҪ"l(f)h(hun)"java\Еrh(hun)(java runtime environmentQJRE)ļSҪĞg[ṩjava\Еrh(hun)ĿǰSun˾javaƽ_ֳJ2EEJ2SEJ2MEƽ_ᘌͬЈĿ(bio)O(sh)M(jn)жλJ2EEJava2 Enterprise EditionҪĿǞI(y)Ӌṩһ(yng)÷(w)\к_l(f)ƽ_J2EEһ_ŵĘ(bio)(zhn)κܛS̶ƳԼķJ2EE(bio)(zhn)Įa(chn)ƷʹÑжNxIBMOracleBEAHP29ѽ(jng)ƳԼĮa(chn)ƷBEA˾weglogica(chn)ƷIBM˾websphareJ2EE𲽰l(f)չɞc΢ܛ.NET(zhn)ľW(wng)j(lu)Ӌƽ_J2SEJava2 Standard EditionҪĿǞ_ʽC(j)͹վṩһ_l(f)\еƽ_҂ڌW(xu)(x)java^ҪDzJ2SEM(jn)_l(f)J2MEJava2 Micro EditionҪMӮa(chn)ƷMӮa(chn)Ʒṩһjava\ƽ_ʹjava܉֙C(j)C(j)픺СPDAȮa(chn)Ʒ\

cJavaZc

1.2.4 JavaZԵc

1. ?q)͞?/p>

javaĺwF(xin)ھϵy(tng)DСϵy(tng)F(xin)Ĺ;ӲҪ󲻸С͵ӋC(j)ϱõ\СеһijO(sh)ӋZһjavaҲ?q)g(sh)ӏصеjavaappletnj󣬷bԌF(xin)ģKϢ[^ԌF(xin)˴aď(f)ÑԽԼ졣javaõε?q)g(sh)ȥ\d^еď(f)sˆһ^(qing)D(zhun)Qྀ̡(ָ)ȷʽoÃ(ni)ԄӻՙC(j)ҲʹóTMĹ(ni)棬dzO(sh)ӋӺͬrp˳eĿܡjavaZԲCZеĴ󲿷ZϤCZԵijTl(f)F(xin)javaZZcCZԘOơ

2. Ұȫ

javaZھg\гrҪM(jn)Ї(yn)ęzһN(qing)ZjavaھgBӕrM(jn)д͙z飬ֹƥ䆖}İl(f)һǷ(zh)һǷͲjavaڽጕrָԓe`javaвܲõַӋķͨ^ָL(ni)Ԫpe`l(f)Ŀ;javaĔ(sh)MָᘌF(xin)@ӾͿڙzб┵(sh)MԽİl(f)oÃ(ni)ԄӻՙC(j)Ҳjava

W(wng)j(lu)ZjavaṩİȫϣҪֹujava\Б(yng)ór(yn)zL(sh)(j)ę(qun)粻SW(wng)j(lu)ϵđ(yng)ó޸ıصĔ(sh)(j)dÑӋC(j)еֹ(ji)a䱻(zh)ǰҪ(jng)^һˌһֹ(ji)aˌjava(zh)ԓͨ^ֹ(ni)ֱLM(jn)һjavaİȫԡͬrjavaOߵҲ(qing)javaİȫ

3. Y(ji)(gu)ҿֲ

W(wng)j(lu)ϳM˸Nͬ͵ęC(j)Ͳϵy(tng)ʹjavaھW(wng)j(lu)κεط\javaggcwϵY(ji)(gu)oP(gun)ֹ(ji)aY(ji)(gu)ļʽκηNӋC(j)ֻ̎Ͳϵy(tng)java\Еrh(hun)ֹ(ji)aļͿԓӋC(j)\ʹچһϵy(tng)ӋC(j)Y(ji)(gu)ҲзdzS̎Y(ji)(gu)IJl(f)չ׃TòN汾ijڲͬ̎\@ʹ_l(f)܉ƽ_ϹܛDzܵʹjavaʹͬһ汾đ(yng)ó\еƽ_

wϵY(ji)(gu)Ҳʹjavaϵy(tng)пֲjava\Еrϵy(tng)ֲͬ̎Ͳϵy(tng)ϣjavaľgjavaZԌF(xin)javaZԺ͘(bio)(zhn)CZԌF(xin)˿^鷽M(jn)ֲ

4.

mȻjavaǽገ(zh)еģȻзdzߵһЩضCPUjavaֹ(ji)aԿٵD(zhun)QɞC(j)aM(jn)Ј(zh)javaֹ(ji)aʽO(sh)ӋᘌC(j)aD(zhun)QHD(zhun)Qrஔ(dng)㣬ԄӵļĴcgֹ(ji)aһЩ(yu)ʹ֮ɸ|(zh)ĴaSjava̓MC(j)ĸM(jn)"rg"(just in time)g(sh)ijF(xin)ʹjavaĈ(zh)ٶ˸

5. ገ(zh)ྀ̲DŽӑB(ti)

ڌF(xin)ƽ_ԣjavaO(sh)Ӌɞገ(zh)ֹ(ji)aSྎgrɵϢʹB^̸Ӻྀʹ(yng)óͬrM(jn)вͬIJ̎ͬ¼ڶྀ̙C(j)Уͬľ̎ͬ΄(w)ijһ΄(w)̎ڵȴB(ti)Ӱ΄(w)Ĉ(zh)@ӾͿ׵ČF(xin)W(wng)j(lu)ϵČrjavaڈ(zh)^ԄӑB(ti)ļdN@һcʹ֮dzmھW(wng)j(lu)\ͬrҲdzܛ_l(f)ʹǸҲ¾gʹ@һđ(yng)ó

˽CZԺC++ZԣԅjavacC/C++ZԵı^˽CZԺC++ZԣԺԱ֪R

a. ȫ׃

javaܶxȫ׃еĹoB(ti)׃ஔ(dng)@ȫ׃@Ӿʹȫ׃bC˰ȫԣC/C++Zڲӷbȫ׃ʹò(dng)ϵy(tng)ı

b. lD(zhun)ָ

C/C++ZgotoZ䌍F(xin)olD(zhun)javaZԛ]g(sh)otoZͨ^̎Ztrycatchfinallyȡ֮˳ĿxҲ(qing)˳

c. ָ

ָC/C++Z`Ҳ׳eĔ(sh)(j)ָM(jn)Ѓ(ni)ɲA(y)֪e`ͨ^ָᘌ(ni)ַM(jn)@ʾD(zhun)Q˽гɆTƉ˰ȫԡjavaTM(jn)κָᘲͬrjavaеĔ(sh)Mͨ^팍F(xin)ģܺõĽQ˔(sh)MԽ@һC/C++Zвzȱc

d. (ni)

CZTʹÎ캯(sh)malloc()free()ጷŃ(ni)C++ZЄt\newdeleteٴጷѽ(jng)ጷŵă(ni)Kጷδă(ni)Kϵy(tng)ıӛጷŲʹõă(ni)KҲuıMϵy(tng)YԴjavaеĔ(sh)(j)Y(ji)(gu)njͨ^\new(ni)沢õʹÙ(qun)oÃ(ni)ՙC(j)ƱCϵy(tng)YԴ˃(ni)ܶϵy(tng)

e. (sh)(j)͵һ

C/C++Zͬƽ_gεĔ(sh)(j)intfloatȷքe䲻ֹͬ(ji)(sh)磺intIBM PCϞ16λVAX-11Ͼ͞32λ(do)˴a(sh)(j)IJֲjava(sh)(j)͵λ(sh)係ǹ̶κεӋC(j)ƽ_˾ͱCjava(sh)(j)ƽ_oP(gun)ԺͿֲ

f. D(zhun)Q

C/C++Zͨ^ָM(jn)D(zhun)QȫشjavaZϵy(tng)Ҫ̎M(jn)Ї(yn)ԙzֹȫD(zhun)Q

g. ^ļ

C/C++Zʹ^ļ•ԭͺȫ׃캯(sh)ڴϵy(tng)So(h)@Щ^ļǷdzyġjava֧^ļɆTͺL(qun)޶bһУ\Еrϵy(tng)LM(jn)пֹǷLͬrjavaimportZcM(jn)ͨԱLČ

h. Y(ji)(gu)“(lin)

C/C++ZýY(ji)(gu)“(lin)ρʾһĔ(sh)(j)Y(ji)(gu)ɆT鹫еȫϴچ}javaֽ֧Y(ji)(gu)“(lin)ϣͨ^є(sh)(j)Y(ji)(gu)ԓ(sh)(j)IJb

i. A(y)̎

C/C++Zк궨xú궨xF(xin)ĴaӰ푳Ŀxjavaֺ֧궨x

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