george.gu
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george.gu：
lqjacklee 写道怎么解决。。 First: Conf ...
Bad version number in .class file -
lqjacklee：
怎么解决。。
Bad version number in .class file -
flyqantas：
would you pleade left more mate ...
UML Extension
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javax.naming.ServiceUnavailableException [Root exception is java.net.UnknownHostException: XXXXX001]
javax.naming.CommunicationException [Root exception is java.net.ConnectException: t3://X.X.X.X:8101: Bootstrap to X.X.X.X/X.X.X.X:8101 failed. It is likely that the remote side declared peer gone ...
DecimalFormat df = new DecimalFormat("999000");
df.format(10);
will output "999010"
http://blog.csdn.net/mobicents/article/details/6285932
Where ConcurrentModificationException raised
Case 1: update value Entries during traverse Map in same Thread
java.util.ConcurrentModificationException will be raised in following java code:
Map<String, String> pendingCorrelations = new Hashtable<String, String>();
pendingCorrel ...
ScheduledThreadPoolExecutor
Execution periodic
Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given period; that is executions will commence after initialDelay then initialDelay+period, then initialDelay + 2 * pe ...
Shallow Heap Size
Shallow size is the amount of memory allocated to store the object itself, not taking into account the referenced objects.
Retained Heap Size
Retained size of an object is its shallow size plus the shallow size of the Objects that are accessible, directly or indirectly, only fr ...
Search-->Copy-->Small Modification-->Delivery with product...-->Search again-->Copy and modify again-->...Or
Rewrite-->Test-->delivery with product...Rewrite-->Test-->delivery with product-->...
We experience the infinitely cycle in different projects when codi ...
Talk something used to happen in projects.
Java basic Exception
Struts global exception handler design.
Batch Processing has to be concerned during enterprise application design and integration test.
Batch Processing Concerns
Normally, it refer to three problems.
Memory Resource consuming
There could be Memory Leak, OutOfMemoryException or consume bulk heap size to slow down the platform response t ...
Here I would like to list some topics I used to search or study.
MBean Servers in Weblogic
The JVM for an Administration Server maintains three MBean servers provided by BEA and optionally maintains the platform MBean server, which is provided by the JDK itself:
Domain Runtime MBean Server: MBe ...
Remove useless method
Remove method never referenced
If method or API is not used any more, it is better to remove them rather than keep them.
Version control/management tools should/will keep old version for you.
Method naming shortly and easy to understood its propose
Attributes in sign ...
Before answer a technical problem or give workaround to a issue, make sure:
Understand the context of people who ask questions.
Where the issue comes from or where it could from.
Find out solution
Impact on other components
Sometimes, answers in general workds could solve the problem. But if ...
Continuous Improvement (1): Delivery Features as Easy and Stable as possible
- 博客分类：
- Project Management
We should delivery features as easily as possible.
We should delivery features as stable as possible. In development phase, make sure all error use case coverred and valid before submitting. Sometimes, two more line code could improve User Experience a lot.
Charset
Charset is a named mapping between sequences of sixteen-bit Unicode code units and sequences of bytes.
1 byte = 8 bits, byte represent the int value from 0x00 through 0xFF. In ASC-II, we use a mapping to represent characters. For example, Charsets are named by strings composed of the fo ...
Normally, jsp_servlet classes will be cached by Weblogic 11g in:
{BEA_WLS}\user_projects\domains\yourdomain\servers\yourserver\tmp\_WL_user\your_app_name
We always meet a strange problem: why JSP page is not up to date even after restart/redeploy application? This is mainly because the cache i ...