打算开始学Java，立此存照

MoodyYang

比圖片更帥? 嗯嗯，我們部門還有幾個單身的MM。。。

MoodyYang

Back to Java.

1.1 hello world and 1.2 FizzBuzz

1. Using packages provides a unique namespace for every Java program
2. & and &&, = and ==.
BTW, I hate the stupid guy who creates the concept of prioritization. Maybe it is important in era of C to save the memory and improves the efficiency, I am quite sure that we are in 21th century now. The only reason why we still use prioritization is : teacher have to prepare some obscure expression for testing.
The guy who create () is genius.

alonemo

不识MAP的人漂过

MoodyYang

第三題，菲波納契數列。
有點頭痛。記得以前有一個很優美的遞歸方式來做這個，可是完全沒有概念了。只好醜陋的開始申請一大堆變量。
邭獠诲e，咚愠鰜斫Y果還是對的。比照一下題上的答案，原來也好不到哪裏去。不過，他變量的命名比我清楚很多，用的是N2，N1，N0。另外，對於函數他也更清楚。
程序要寫得優美，一定要多些多看。附上一個標本，希望我以後不要再寫這樣死的程序

public class Fibonacci {
        /**
         * @param args
         */
        public static void main(String[] args) {
                // TODO Auto-generated method stub
                int i=1;
                int j=1;
                int k=1;
                System.out.println(i);
                System.out.println(j);
                for (int count=1; count<=18; count++){
                        k=i+j;
                        i=j;
                        j=k;
                        System.out.println(k);
                }
        }
}

MoodyYang

1.4 Command-Line argument

Array / Pointer is the most important thing in C. On another hand, they are most difficult thing in C too. After learning the behavior of stack, it will make beginner headache for couples of weeks.

On my short experience of being a teacher, I “heard” that Jave ban pointer because of some reasons. Pointer is quite good after you master it and also quite bad before you master it. It is said that some fans of pointer have successfully use pointer in Java but I think that is not necessary. Good for use and increase the robust of your program is the most important thing in application.

  Let’s back to Array. Since the No.1 trouble-maker is not exist in Java, Array (with out pointer of array) is not so difficult.

  See the program itself. Find out where to input the argument trouble me most because I am not familiar with eclipse. Finally I find it in: Run->Open Run Dialog->Arguments.
Find my program as follow. Take care I have reverse the order of arguments.

for(int i=1; i<=args.length; i++)
                        System.out.print(args[(args.length-i)]+" ";

I find I make a same mistake with author because I leave a useless blank in end of output. But I have not find a good way to eliminate the extra blank & keep program in short, I decide skip this small annoyance

MoodyYang

I found a post on web service besides this one. I am sure I have lot of thing to learn since I just finish running “Hello world” in 20 hours.

MoodyYang

1.5 Reverse
原來後面就是Reverse，還更徹底。
遇到一個小問題，請問Eclipse怎樣進行單步調試?

MoodyYang

最近几天在广州朋友这边玩，上来瞅瞅发现还是很热闹的。

想到一个问题：当年学C的时候有MFC/STL, Java也是跑不掉的吧。哪里有函数库的手册之类的下载？知道的兄弟请吭一声。谢谢

justforregister

sun网站有的吧， 或者google

MoodyYang

应该有一些书可以下载,然后有一些例子,很容易查询使用的那种吧.

明天晚上回家,去搜索一下...