use Foriegn Language to record life

these days,i try to summarize  knowledge in my five past years .this morning i just  restudy the JVM (Java Virtual Machine). actually before this because the reason of job,i do not know it well .let u

if a web application needs a cluster,there are several concern points: HttpSession , synchronized key words will invalidate, cache management.the benefits of the cluster are : load balance and failo

there are serverl states of the Thread in Java1 runnable: when thread starts,but it does not mean it run immediately2 running:thread gets CPU schedule  and start to run3 waiting: thread call

JXL is wirtten in Java .it can using Java API to operate the Excel,like Read ,Write date ,formula to Excel.it supports font,number,data formating ,boarder,shadding ,coolor of cell etc,it is wond

there are several common data structures using in almost programming languages:1 array:a  fixed sizes collection of same data type.it can be one dimenstion or two dimensinons or much more2 set:i

in oop lanuage,let us take a look at the key principles of handing the errors or exceptions:1 do not try to handle system errors ,fail it fast when it happened. try to leave a audit trail of the pro

if a  company wants  its systems to  be maintainable ,flexibile ,extensible ,readable.during the process of the development,code view is very crucial.,there are uaually some objective and subjective

oop  the acronym of the obejct oriented programming . encapulation ,polymorphism , inheritance are the three key features. abstraction is also important in oop.well,then what problems they solve ?

3-tiers or multi-tiers arcitectures  force separation of presentation logic,business logic ,database logic. let us take a look at the some key benefits:1 managibility: the operations is easy2 ex

about coluding compute,i have no much experience ,i just know there are three core functionalities :saas:software as a serviceiaas:infrastructure as a servicepaas:platform as a service

this is the classic interview question,well, in addition ,to begin with it ,let us discuss what is difference for program ,process, thread? program,it is the certain  amount  of the static codes ,it

manageability: manageability  of the application is very crucial . designing a system that is easy to operate is another crucial consideration . it equates the ease of  diagnosing and understanding pr

now let us talk about the architecture principles. how to design the best software, i think the ideal architecture  must  meet the following basic features:1 availability:the Uptime of system must b

the Apache Hadoop   delivers functionality  of reliable ,scalable and distributed computingApache Hadoop library allows for  the  distributed processing  of the large data sets across  clusters