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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÷\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^ҪDzJ2SEM_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󲻸ߣС͵ӋCϱõ\еһijO(sh)ӋZһӣjavaҲ?q)g(sh)ӏصеjavaappletnjbԌF(xin)ģKϢ[^ԌF(xin)˴aďÑԽԼjavaõε?q)g(sh)ȥ\d^еďsˆһ^СD(zhun)Qྀ(ָ)ȷʽoÃ(ni)ԄӻՙCҲʹóTMĹ(ni)dzO(sh)ӋӺͬrp˳eĿjavaZԲCZеĴ󲿷ZϤCZԵijTl(f)F(xin)javaZZcCZԘO

2. Ұȫ

javaZھg\гrҪMЇęz顣һNZjavaھgBӕrMд͙z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)ԄӻՙCҲjavaԡ

W(wng)j(lu)ZjavaṩİȫҪֹujava\БórzL(sh)(j)ę(qun)ޣ粻SW(wng)j(lu)ϵđó޸ıصĔ(sh)(j)dÑӋCеֹ(ji)a䱻(zh)ǰҪ(jng)^һˌߣһֹ(ji)aˌjava(zh)ԓͨ^ֹ(ni)ֱLMһjavaİȫԡͬrjavaOߵҲjavaİȫ

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\ʹچһϵy(tng)ӋCY(ji)(gu)ҲзdzS̎Y(ji)(gu)IJl(f)չ׃TòN汾ijڲͬ̎\У@ʹ_l(f)܉ƽ_ϹܛDzܵʹjavaʹͬһ汾đó\еƽ_ϡ

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

4.

mȻjavaǽገ(zh)еȻзdzߵܣһЩضCPUjavaֹ(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_ԣjavaO(sh)Ӌɞገ(zh)ֹ(ji)aSྎgrɵϢʹB^̸ӺΡྀʹóͬrMвͬIJ̎ͬ¼ڶྀ̙Cͬľ̎ͬ΄ijһ΄̎ڵȴB(ti)Ӱ΄յĈ(zh)У@ӾͿ׵ČF(xin)W(wng)j(lu)ϵČrjavaڈ(zh)^ԄӑB(ti)ļdN@һcʹ֮dzmھW(wng)j(lu)\ͬrҲdzܛ_l(f)ʹǸҲ¾gʹ@һđó

˽CZԺC++ZԣԅjavacC/C++ZԵı^˽CZԺC++ZԣԺԱ֪R

a. ȫ׃

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

b. lD(zhun)ָ

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

c. ָ

ָC/C++Z`Ҳ׳eĔ(sh)(j)ָMЃ(ni)ɲA֪e`ңͨ^ָᘌ(ni)ַM@ʾD(zhun)Q˽гɆTƉ˰ȫjavaTMκָᘲͬrjavaеĔ(sh)Mͨ^팍F(xin)ܺõĽQ˔(sh)MԽ@һC/C++Zвzȱc

d. (ni)

CZУTʹÎ캯(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)ՙCƱCϵy(tng)YԴ˃(ni)ܶϵy(tng)

e. (sh)(j)͵һ

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

f. D(zhun)Q

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

g. ^ļ

C/C++Zʹ^ļ•ԭͺȫ׃캯(sh)ȣڴϵy(tng)So@Щ^ļǷdzyġjava֧^ļɆTͺL(qun)޶bһ\Еrϵy(tng)LMпƣֹǷLͬrjavaimportZcMͨԱL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. A̎

C/C++Zк궨xú궨xF(xin)ĴaӰ푳Ŀxjavaֺ֧궨x

ӋCԇjava֪RcP(gun)£

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