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RSS订阅原创 Installing software from source in Linux
< Installing software from source in Linux - 1.2 >So you've downloaded a software package with tar.gz or tar.bz2 extension and have no idea what to do with it. Or perhaps you alread...
2011-01-06 20:31:56
267
MySQL DML
1. to show current mysql version:>show variables like '%version%'; 2. create database or table with specified character set & collate:>create database default character set utf8 coll...
2011-01-04 08:28:38
130
vim preferences
How to use 4 spaces instead of tab in vim: 1 :set ts=4 2 :set number 3 :set autoindent 4 :set expandtab 5 :set softtabstop=4 6 :set shiftwidth=4:set showmode:set number:...
2010-12-26 15:06:16
140
How to build static library and how to use it in Linux
1. declare the interface of libray: max.h ------------------------------ int max(int,int);2. implement the interface: max.c ------------------------------ #include "max.h" int max(int a, int ...
2010-12-23 08:46:57
130
const
There are two type of const:1. const int *p; <----- pointer 'p' is not const, while to what it points is const.e.g.:int i;const int ci = 5;const int *p;p = &i;p = &ci;*p = 1...
2010-12-22 21:33:14
128
Eclipse
1. highlight warning log message in eclipse console:Configure two separate appenders. One for the levels WARN and higher and one for the levels INFO and lower. Assign them to the std.err and std....
2010-12-22 13:29:40
83
Programming C in Linux
0. install compiler and associate environment.sudo apt-get install build-essentialor install with CD(without internet):sudo apt-cdrom addsudo aptitude updatesudo aptitude install build-es...
2010-12-22 13:28:47
108
Java Advance
1. A class with a given name can only be loaded once by a given classloader. 2. When the JVM is started, three class loaders are used: 1.Bootstrap class loader - loads the core Java librar...
2010-12-22 13:27:40
207
J2EE EJB OpenEJB
1.Generally speaking the only way to get a Container-Managed Resource is via dependency injection or lookup from within a Container-Managed Component. 2. Singleton a.Singletons have an '@Star...
2010-12-22 13:26:46
240
Spring
1. @Autowired vs. setter@Autowired can mark in field or setter, with @Autowired, setter is not necessary;If @Autowired is not apply to property, then setter is necesary for injection. 2. @C...
2010-12-22 13:25:41
137
JPA Toplink
1.persistence.xml--------------------------------------------------------------------------------<?xml version="1.0" encoding="UTF-8"?><persistence version="1.0" xmlns="http://java.s...
2010-12-22 13:25:01
152
Apache Ant
1. Add additional command line arguments for <javac> task:<javac srcdir="${dist}/trsWeb" destdir="${dist}/build/trsWeb" fork="true" classpath="${compile_classpath}" source="1.5&quo
2010-12-22 13:22:47
116
Trouble Shooting
1.Problem: log4j:WARN Document root element "log4j:configuration", must match DOCTYPE root "null".Solution: Add '<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">' to log4j.xml e....
2010-12-22 13:22:13
251
Maven Basic
0. useful commands: mvn install:install-file -DgroupId=org.apache.maven.archetypes -DartifactId=${myArtifactId} -Dversion=RELEASE -Dpackaging=jar -Dfile=/path/to/file mvn deploy:deploy-fi...
2010-12-22 13:20:49
149
Install Ubuntu9.10 in Oracle VirtualBox
1. How to use share folder in VirtualBox for Windows XP -> Ubuntu: a. From VBox menu, Install Guest Additional first (your guest os should be running) b. sudo mkdir /mnt/sf_xp c. sud...
2010-12-22 13:12:44
135
Oracle
1.SHOW USER(or SELECT USER FROM DUAL)/ 2.SELECT USERNAME, USER_ID, PASSWORD FROM DBA_USERS ORDER BY USERNAME/ 3.SELECT DEFAULT_TABLESPACE FROM USER_USERS/ 4.SELECT TABLE_N...
2010-12-22 13:09:44
185
Utility bat scripts
1. To launch a application in command-line without open a cmd window:>start putty -load Ubuntu -l root -pw *** 2. copy /Y file1 directory2 ------ override without warning xcopy /E...
2010-12-22 11:57:32
86
Ubuntu Beginer
Ubuntu version========================================================uname -auname -r Ubuntu rpm / VMware / root / java / vi / putty / jboss============================================...
2010-12-22 00:26:04
144
How to boot up Ubuntu in text terminal mode?
Ubuntu9.10 boot by 'grub', to change the boot mode to text-mode, we just need to change boot settings in '/boot/grub/grub.cfg'. a. #vim /boot/grub/grub.cfg, you will find section like: menuent...
2010-12-22 00:21:08
108
Ubuntu scripts executing sequence after user sign in
1. Before user sign in, the '/etc/rc$runlevel.d/*' will be execute according the runlevel. 2. After user sign in, the Ubuntu9.10 will execute below scripts list below:a. first, the global '/etc/...
2010-12-21 23:03:04
121
typedef
1. primitivetypedef int Integer;Integer i; 2. arraytypedef int Arr[10];Arr a, b, c; 3. function pointer#include<stdio.h> typedef int (*pfn)(int, int); void main(){i...
2010-12-21 22:52:39
77
Install ttylinux
1. gcc tbz ftp: ftp://ftp.int.ru/pub/FreeBSD/ports/i386/packages-8-stable/lang/2. mount cdrom: mount /dev/hdc /mnt/cdrom Install ttylinux in VritualBox1. download http://ttylinux.net/Downlo...
2010-12-19 21:15:32
180
原创 Data Abstraction and Problem solving with Java
1.求数组中的最大数2.1+2+3+...+n3.求n个整数的积4.求n个整数的平均值5.求n个自然数的最大公约数与最小公倍数6.有一对雌雄兔,每两个月就繁殖雌雄各一对兔子.问n个月后共有多少对兔子?7.已知:数列1,1,2,4,7,13,24,44,...求数列的第 n项.8. Eight Queen problem.
2007-08-09 17:25:00
1280
原创 2007-8-3 Eclipse plug-in
11:24 2007-8-31. Tomcat5.5.23 can only run on JDK5.0 or later version.2. Struts 2.0 just can run on Tomcat5.5.23 or later version.11:41 2007-8-31. There are three other view technologies that can repl
2007-08-05 16:17:00
581
原创 body events
1. onbeforeunload This event trigger when the page will unload, the browser will popup a confirm message box to ask whether you want to navigate from this page to another page, it is browser behavi
2007-07-26 10:57:00
554
原创 JSP---web.xml
1. JSP EL just support by JSP2.0 or above, the servlet 2.3 works for JSP1.2. If we want to use EL in JSP page, we should declare the version of servlet as 2.4 in web.xml. "-//Sun Microsystems, I
2007-07-20 00:39:00
683
原创 SCJP 2007-06-14
1. There are only abstract or final is permitted in local inner class.2. An Anonymous inner class means that creating an object of an anonymous class thats inherited from ClassName.
2007-06-15 00:05:00
538
原创 scjp 2007-06-11
1. String s1 = new String("MyString"); String s2 = new String("MyString"); s1 == s2;Answer: false.2. A abstract class provides a way to defer implementation to subclass. 3. A class loc
2007-06-11 09:09:00
467
原创 深入理解JavaScript中的函数
概述 函数是进行模块化程序设计的基础，编写复杂的Ajax应用程序，必须对函数有更深入的了解。JavaScript中的函数不同于其他的语言，每个函数都是作为一个对象被维护和运行的。通过函数对象的性质，可以很方便的将一个函数赋值给一个变量或者将函数作为参数传递。在继续讲述之前，先看一下函数的使用语法： function f
2007-05-12 23:17:00
632
原创 a rmi simple demo
这个例子模拟了一个远程请求对象属性的过程。有一个远程对象Dog在网络上，现在要得到它的名字（strName）属性。程序在客户端设一个存根（Dog_Stub）类，在服务器端启动一个骨架（dog_Skeleton）类，这两个类都实现了Dog接口，Dog_Stub与 Dog_Skeleton通过Socket进行远程通信。当客户程序DogClient向Dog_Stub发出获取名字属性的请求时，D
2007-05-12 10:41:00
651
转载 一个ＪＮＩ的小例子
最近要在ＪＡＶＡ程序里调用Ｃ＋＋写的.dll文件，要用到ＪＮＩ技术，找了些资料，自己做了个小例子．步骤如下：ＪＡＶＡ 代码：public class testdll{ static { System.loadLibrary("DLL"); } public native static int get(); public native static void set(int i);
2007-05-12 02:25:00
6389
3
原创 Oracle Commands
1. select table_name from user_tables; //当前用户的表 select table_name from all_tables; //所有用户的表 select table_name from dba_tables; //包括系统表 select table_name
2007-04-19 00:37:00
693
原创 log4j.properties
## LOGGERS ###define a logger named helloAppLogger log4j.rootLogger=DEBUG,console,file## APPENDERS ### define an appender named console, which is set to be a ConsoleAppenderlog4j.appender.console=org.
2007-04-12 18:06:00
513
原创 Can you explain the result of the following example? Oh, my!
class Base { public boolean foo(Base b) { return true; } } class Sub extends Base { public boolean foo(Sub s) { return false; } } public class Test { public static void main(St
2007-04-05 16:30:00
641
原创 How to redirect Sysout.out?
Use System.setOut()package io;import java.io.FileOutputStream;import java.io.IOException;import java.io.PrintStream;public class Redirection { public static void main(String args[]) throws IOExcept
2007-04-04 13:52:00
609
原创 Can we put a continue in a switch-case statement?
// Guess the print out, then run it.// A good IQ testpublic class A { public static void main(String args[]) { int x = 0; while (x System.out.print(" " + x);
2007-04-04 13:19:00
627
原创 Degester
mysql oracle.jdbc.driver.OracleDriver com.mysql.jdbc.Driver See JDBC documentation for detail. --> jdbc:m
2007-04-03 23:13:00
846
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