原创 cross domain 訪問其他網站問題
有人問我，我再問別人也沒看到更好的提示，還是自己google。看到這個例子（http://www.51ajax.com/bbs/viewthread.php?tid=565）: ------------------------
2020-07-04 07:58:51
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原创 override equals() and hashCode() methods
Saw the hashCode() method used in the FarmerWolfGoatState (a state representation) implementation, but do not know why
2020-07-04 07:58:51
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原创 what is gradient?
I saw the term used in a paper, but really cannot remember what it is and what it means. Forgot too much about those ba
2020-07-04 07:58:51
原创 how to use thread
Just got a problem which wasted me some time. The problem is just: Regarding a procedure A, which mainly implements a
2020-07-04 07:58:51
原创 manifest.mf writing errors...(crazy!)
by now got three errors, this afternoon. =============== Manifest-Version: 1.0 Class-Path: ... Main-Class: ... ======
2020-07-04 07:58:51
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原创 Some linux commands I used
quota username ---- to get the quota of current user; rm -r cloud ---- remove the whole file in the folder (cloud is th
2020-07-04 07:58:51
原创 The use of "." or not for current directory, in Java
Just got one exception when I wanted to use a local file inside a local dir
2020-07-04 07:58:51
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原创 How to do reasoning/inference based on Jena
Just realize how to do real reasoning by Jena. Before I just used Jena to query the statments expressed explicitly i
2020-07-04 07:58:51
原创 Elements of ArrayList of java, cloned, not reference
String s = "haha"; ArrayList x = new ArrayList(); x.add(s); s = "changed"; String y = (String)x.get(0); Sy
2020-07-04 07:58:51
原创 Difference between PrintWriter and PrintStream
Most programs should use readers and writers to read and write information. This is because they both can handle any c
2020-02-25 08:46:45
原创 Poisson distribution problem
I need to generate a set of numbers with Poisson distribution, given a lambda. I got a piece of code from Internet as f
2020-02-25 08:46:45
原创 how to make a JAR file
It is easy when you do not refer any other jar files in your project. You may directly use eclipse's Export and ask it
2020-02-25 08:46:45
原创 the use of Latex for paper writing
A latex file (.tex) need to have a document type, specified like this "/documentclass{myclass}". Each class has an asso
2020-02-25 08:46:45
原创 presentation tips!
long but very useful tips! ******************** 轉帖一 成功英語演講的祕訣： 開場白、結束語 應對問題 -I will be pleased to answer any ques
2020-02-25 08:46:45
原创 How Java handles arguments of a class type.
=====suppose such a method: public static void openFile(String fileName, PrintWriter stream) throws FileNotFoundExcep
2020-02-25 08:46:45