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  • Users: lovekang
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  1. lovekang

    how to set ":1,$s/^M//g". in the .exrc file?

    I can't seem to set ":1,$s/^M//g" in the .exrc file how? Thanks.
  2. lovekang

    how to show line number in vi at the benning?

    how to show line number at the very beginning? I mean without :set nu each time I open the file.
  3. lovekang

    more info about joins

    as I know oracle have 3 kinds of joins methods. hash, nested loop, sort merge joins. I have no idea about the differences. any comments, articles are welcomed. Thanks.
  4. lovekang

    why default constructors are need?

    The code instuctors in my project, say I need default constructors. but I don't know why. As I know the default constructors are automatically added and compiled by the jvm unless any constructors other than default constructor exist. if default constructor is not there, and I use the default...
  5. lovekang

    what's for "select level from dual connect by level <= 10"

    what's for this type of query? select level from dual connect by level <= 10 in what situation this can be used? Thanks.
  6. lovekang

    how to convert html files to pdf files?

    FOP(http://www.javaworld.com/javaworld/jw-04-2006/jw-0410-html.html?page=3) can convert html to pdf. but the source above I can't seem to reach DocumentInputSource and Driver class even though all the library from apache fop jar files(fop-0.94-bin-jdk1.4)
  7. lovekang

    data transfer from oracle 9i to oracle 10g

    I have to transfer data from oracle 9i to oracle 10g. objects, for examples tables, there are differences between the old schema in 9i and the new schema in 10g, some tables are divided, and some are merged. as you might guess, making scripts are very cumbersome jobs. I need tools or utilities...
  8. lovekang

    remove duplicate rows in Hierarchical Queries

    in the query below how to surpress last six rows(they are duplicate)? drop table tbl_emp; create table tbl_emp( emp_no varchar2(20), emp_name varchar2(20), ref_emp_no varchar2(20) ); insert into tbl_emp(emp_no,emp_name,ref_emp_no) values('677','cho',''); insert into...
  9. lovekang

    retrieve constraints definition

    how to retrieve oracle constraints definitions? like pk, fk, not null, default etc. Thanks
  10. lovekang

    read and write ms word files

    how to read write ms word files. thanks.
  11. lovekang

    structure of HttpServletRequest object and the request url mechanism

    API says about getInputStream() of HttpServletRequest is like this. Retrieves the body of the request as binary data using a ServletInputStream. then request is composed of headers and body. and body is composed of parameters and their values. and headers can be viewed with...
  12. lovekang

    getting info about request object.

    I want all the infomation about request object not only headers and mayby body or contents. the page below don't show anything. what's the problem? Thanks in advance. <%@ page import = "java.io.*" %> <%@ page import = "javax.servlet.*" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01...
  13. lovekang

    [Word 2007] search and replace &quot;^b&quot; after mail merge.

    After mail merge how can I delete "divide region(from the next page)" ? the "search and replace" won't work for "^b" thanks. FYI. sorry for the name above because I don't use english version of word 2007. if not use mail merge, i mean normal case word search and repalce the special charactor...
  14. lovekang

    what's the meaning of &quot;typesafe&quot;?

    what's the meaning of "typesafe"? Thanks in advance.
  15. lovekang

    calculating numbers

    public static void main(String args[]) { System.out.println(0.1); // 0.1 System.out.println(0.7); // 0.7 System.out.println(0.1 + 0.7); // 0.7999999999999999 } I expect 0.1, 0.7 and 0.8 why this happens? thanks.
  16. lovekang

    differences between Writer/Reader and InputStream/OutputStream?

    what's the differences between Writer/Reader and InputStream/OutputStream? so confusing...
  17. lovekang

    differences between Writer/Reader and InputStream/OutputStream?

    what's the differences between Writer/Reader and InputStream/OutputStream? so confusing...
  18. lovekang

    how to monitor sql queries onto the oracle 9i

    I'm a java programmer. The system, I have to handle, is not well-documented so I have hard time to working with it. I'm wonering is there a way to monitor all sql queries(or imaginarily filter them) onto the oracle database. then I navigate the user's UI and which UI interact with which...
  19. lovekang

    oracle jdbc programming(preaparedstatement setXXX vs inline sql)

    case 1. PreparedStatement pstmt = conn.getPreparedStatement(); pstmt.setString(1,"john"); case 2. String sql = "select * from emp where user_id = '" +"john"+"'"; in the cases above, performance is segnificant ?
  20. lovekang

    who is qualified for smtp server?

    Can everybody set smtp server(windows, Linux, Unix)? I mean if someone is online, he or she can send mail? if so, what if some notorious guys send lot's of spam mail? if not so, which conditions have to be met?

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