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java學(xué)習(xí)過(guò)程 譯文+原文.doc

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java學(xué)習(xí)過(guò)程 譯文+原文,java learning path processeach person's study method is different, a person's method suits another person not necessarily, i only can discuss own study method. ...
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Java Learning Path process
Each person's study method is different, a person's method suits another person not necessarily, I only can discuss own study method. Because I study Java am study independently completely, has not asked others, therefore the study process basically is completely oneself tries to find out. I did not know whether this method is the quite good method, only could give everybody to provide refers.
Studies Java first step installs good JDK, writes Hello World? Actually the JDK study is not so simple, has two questions about JDK is very easy to puzzle the Java programmer continuously the place: Is the CLASSPATH question, actually said from the principle, is how must make clear JRE ClassLoader increase Class; Another question is package and the import question, how seeks the kind of way question. These two questions tried to find out clear, eliminated has studied Java and uses JDK the biggest barrier. The recommendation looked Wang Sen "the Java Depth Experiences dangers", has carried on the thorough discussion to these two questions


JAVA學(xué)習(xí)過(guò)程
每個(gè)人的學(xué)習(xí)方法是不同的,一個(gè)人的方法不見(jiàn)得適合另一個(gè)人,我只能是談自己的學(xué)習(xí)方法。因?yàn)槲覍W(xué)習(xí)Java是完全自學(xué)的,從來(lái)沒(méi)有問(wèn)過(guò)別人,所以學(xué)習(xí)的過(guò)程基本上完全是自己摸索出來(lái)的。我也不知道這種方法是否是比較好的方法,只能給大家提供一點(diǎn)參考了。
學(xué)習(xí)Java的第一步是安裝好JDK,寫(xiě)一個(gè)Hello World,其實(shí)JDK的學(xué)習(xí)沒(méi)有那么簡(jiǎn)單,關(guān)于JDK有兩個(gè)問(wèn)題是很容易一直困擾Java程序員的地方:一個(gè)是CLASSPATH的問(wèn)題,其實(shí)從原理上來(lái)說(shuō),是要搞清楚JRE的ClassLoader是如何加載Class的;另一個(gè)問(wèn)題是package和import問(wèn)題,如何來(lái)尋找類的路徑問(wèn)題。把這兩個(gè)問(wèn)題摸索清楚了,就掃除了學(xué)習(xí)Java和使用JDK的最大障礙。推薦看一下王森的《Java深度歷險(xiǎn)》,對(duì)這兩個(gè)問(wèn)題進(jìn)行了深入的探討。
第二步是學(xué)習(xí)Java的語(yǔ)法。Java的語(yǔ)法是類C++的,基本上主流的編程語(yǔ)言不是類C,就是類C++的,沒(méi)有什么新東西,所以語(yǔ)法的學(xué)習(xí),大概就是半天的時(shí)間足夠了。唯一需要注意的是有幾個(gè)不容易搞清楚的關(guān)鍵字的用法,public,protected,private,static,什么時(shí)候用,為什么要用,怎么用,這可能需要有人來(lái)指點(diǎn)一下,我當(dāng)初是完全自己琢磨出來(lái)的,花了很久的時(shí)間。不過(guò)后來(lái)我看到《Thinking in Java》這本書(shū)上面是講了這些概念的。
第三步是學(xué)習(xí)Java的面向?qū)ο蟮木幊陶Z(yǔ)言的特性的地方。比如繼承,構(gòu)造器,抽象類,接口,方法的多態(tài),重載,覆蓋,Java的異常處理機(jī)制。對(duì)于一個(gè)沒(méi)有面向?qū)ο笳Z(yǔ)言背景的人來(lái)說(shuō),我覺(jué)得這個(gè)過(guò)程需要花篅@ず@@な奔?,因为学习Java之前沒(méi)有C++的經(jīng)驗(yàn),只有C的經(jīng)驗(yàn),我是大概花了一個(gè)月左右吧,才徹底把這些概念都搞清楚,把書(shū)上面的例子反復(fù)的揣