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ӋCԇjava֪Rc

rg2025-10-02 21:54:52 javaZ

ӋCԇjava֪Rc

ʮּʲôʹ҂ڱǰÓf?֪RnjWǰٷ־W(wng)СӋCԇjava֪RcgӭW!

ӋCԇjava֪Rc

cһUչӋƽ_

1.2.5 javaƽ_-UչӋƽ_

javaHǾZ߀һ_l(f)ƽ_javag(sh)oTṩS๤ߣgęnļߵȵͬrjava߀һl(f)ƽ_ЃɷNҪ"l(f)h(hun)"java\Еrh(hun)(java runtime environmentQJRE)ļSҪĞg[ṩjava\Еrh(hun)ĿǰSun˾javaƽ_ֳJ2EEJ2SEJ2MEƽ_ᘌͬЈĿ˺O(sh)MжλJ2EEJava2 Enterprise EditionҪĿǞI(y)Ӌṩһ(yng)÷(w)\к_l(f)ƽ_J2EEһ_ŵĘ˜κܛS̶ƳԼķJ2EE˜ʵĮa(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͹վṩһ_l(f)\еƽ_҂ڌWjava^УҪDzJ2SEM_l(f)J2MEJava2 Micro EditionҪMӮa(chn)ƷMӮa(chn)Ʒṩһjava\ƽ_ʹjava܉֙CC픺СPDAȮa(chn)Ʒ\

cJavaZc

1.2.4 JavaZԵc

1. ?q)͞?/p>

javaĺwF(xin)ھϵy(tng)DСϵy(tng)F(xin)Ĺ;ӲҪ󲻸С͵ӋCϱõ\СеһijO(sh)ӋZһjavaҲ?q)g(sh)ӏصеjavaappletnj󣬷bԌF(xin)ģKϢ[^ԌF(xin)˴aď(f)ÑԽԼ졣javaõε?q)g(sh)ȥ\d^еď(f)sˆһ^СD(zhun)Qྀ(ָ)ȷʽoÃ(ni)ԄӻՙCҲʹóTMĹ(ni)dzO(sh)ӋӺͬrp˳eĿܡjavaZԲCZеĴ󲿷ZϤCZԵijTl(f)F(xin)javaZZcCZԘO

2. Ұȫ

javaZھg\гrҪMЇęzһNZjavaھgBӕrMд͙z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)ԄӻՙCҲjava

W(wng)j(lu)ZԣjavaṩİȫҪֹujava\Б(yng)órzL(sh)(j)ę(qun)粻SW(wng)j(lu)ϵđ(yng)ó޸ıصĔ(sh)(j)dÑӋCеֹ(ji)a䱻(zh)ǰҪ(jng)^һˌһֹ(ji)aˌjava(zh)ԓͨ^ֹ(ni)ֱLMһjavaİȫͬrjavaOߵҲjavaİȫԡ

3. Y(ji)(gu)ҿֲ

W(wng)j(lu)ϳM˸Nͬ͵ęCͲϵy(tng)ʹjavaھW(wng)j(lu)κεط\javaggcwϵY(ji)(gu)oP(gun)ֹ(ji)aY(ji)(gu)ļʽκηNӋCֻ̎Ͳϵy(tng)java\Еrh(hun)ֹ(ji)aļͿԓӋC\Сʹچһϵy(tng)ӋCY(ji)(gu)ҲзdzS̎Y(ji)(gu)IJl(f)չ׃TòN汾ijڲͬ̎\У@ʹ_l(f)܉ƽ_ϹܛDzܵʹjavaʹͬһ汾đ(yng)ó\еƽ_ϡ

wϵY(ji)(gu)Ҳʹjavaϵy(tng)пֲjava\Еrϵy(tng)ֲͬ̎Ͳϵy(tng)javaľgjavaZԌF(xin)ģjavaZԺ͘˜CZԌF(xin)˿^鷽Mֲ

4.

mȻjavaǽገ(zh)еģȻзdzߵһЩضCPUjavaֹ(ji)aԿٵD(zhun)QɞCaMЈ(zh)javaֹ(ji)aʽO(sh)ӋᘌCaD(zhun)QHD(zhun)QrஔԄӵļĴcgֹ(ji)aһЩ(yu)ʹ֮ɸ|(zh)ĴaSjava̓MCĸM"rg"(just in time)g(sh)ijF(xin)ʹjavaĈ(zh)ٶ˸ߡ

5. ገ(zh)ྀ̲DŽӑB(ti)

ڌF(xin)ƽ_javaO(sh)Ӌɞገ(zh)Уֹ(ji)aSྎgrɵϢʹB^̸Ӻྀʹ(yng)óͬrMвͬIJ̎ͬ¼ڶྀ̙Cͬľ̎ͬ΄(w)棬ijһ΄(w)̎ڵȴB(ti)Ӱ΄(w)Ĉ(zh)@ӾͿ׵ČF(xin)W(wng)j(lu)ϵČrjavaڈ(zh)^УԄӑB(ti)ļdN@һcʹ֮dzmھW(wng)j(lu)\УͬrҲdzܛ_l(f)ʹǸҲ¾gʹ@һđ(yng)ó

˽CZԺC++ZԣԅjavacC/C++ZԵı^˽CZԺC++ZԺԱ֪R

a. ȫ׃

javaܶxȫ׃еĹoB(ti)׃ஔ@ȫ׃@Ӿʹȫ׃bУC˰ȫC/C++Zڲӷbȫ׃ʹòϵy(tng)ı

b. lD(zhun)ָ

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

c. ָ

ָC/C++Z`Ҳ׳eĔ(sh)(j)ָMЃ(ni)ɲA(y)֪e`ͨ^ָᘌ(ni)ַM@ʾD(zhun)Q˽гɆTƉ˰ȫjavaTMκָᘲͬrjavaеĔ(sh)Mͨ^팍F(xin)ܺõĽQ˔(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)YԴjavaУеĔ(sh)(j)Y(ji)(gu)njͨ^\new(ni)沢õʹÙ(qun)oÃ(ni)ՙCƱCϵy(tng)YԴ˃(ni)ܶϵy(tng)

e. (sh)(j)͵һ

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

f. D(zhun)Q

C/C++ZУͨ^ָMD(zhun)QȫشjavaZϵy(tng)Ҫ̎MЇԙzֹȫD(zhun)Q

g. ^ļ

C/C++Zʹ^ļ•ԭͺȫ׃캯(sh)ڴϵy(tng)УSo@Щ^ļǷdzyjava֧^ļɆTͺL(qun)޶bһУ\Еrϵy(tng)LMпֹǷLͬrjavaimportZcMͨԱL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)ͨ^є(sh)(j)Y(ji)(gu)ԓ(sh)(j)IJb档

i. A(y)̎

C/C++Zк궨xú궨xF(xin)ĴaӰ푳Ŀxjavaֺ֧궨x

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