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Re: Updating code from jdk1.2 to recent jdk SE 1.6

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2012-07-11 23:02, Lew skrev:
> On Wednesday, July 11, 2012 12:27:43 AM UTC-7, Sanny wrote:
>> > > Currently I put data in String.
>> > 
>> > What do you mean by "data"?
> 
> Please attribute your quotes.
>  
>> Say I have employee data: Name, Tel, City, Salary.
>>
>> Either I can put them in a class or Comma Separated in single String.
> 
> Creating a type is better.
> 
>> Creating a class then sending that class to a function or database is not much efficient.
> 
> It's extremely efficient, as Silvio and I have both pointed out.
> 
>> But comma separated String you just have to send one string and each Value is separated in the String using "separator comma".
> 
> Antipattern.
> 
>> But addition and removing data from String is very inefficient.
>>
> ... [snip] ...
>>
>> If I use Classes I have to send Employee class to function
> 
> No, you don't. You send a *reference* to an *instance* of that class.
> 
>> 1. function changetelnum(EmployeeClass ss, long new_tel, long old_tel)
>> {
>> //STEPs LIST
>> //Search Class with old tel number
> 
> You don't search any class (let alone 'Class').
> 
>> //replace tel number by new_tel
>> // return(ss);
>> }
>>
>> What do you think which one is faster Sending String or Sending a Class? for changing tel number in an Emplyee data?
> 
> It's not a question of what anyone thinks, but of what is true.
> 
>> Is there any other data stricture that does it better?
> 
> The data structure that matches the entity you're modeling.
> 
> Either you have modeled your domain or you have not.
> 
> This is objectively verifiable (i.e., disprovable). Look at the logical 
> description of any given entity in your model. Does your class definition
> match the logical definition? Then it's the right structure, otherwise 
> not.
> 
>> When I pass a parameter Class "EmployeeClass" Does the Java Compiler create a new Class ss "EmployeeClass".
> 
> No.
> 
> As you would know if you read the documentation.
> 
> RTFM.
> 
>> Is there any other way to change telnumber?
> 
> The right way.
> 
> E.g., 
> 
> public class Person
> {
>   private String name;
>   private String telephone;
>   public String getName()
>   {
>     return name;
>   }
>   public void setName(String name) 
>   {
>     this.name = name;
>   }
>   public void setTelephone(String telephone) 
>   {
>     this.telephone = telephone;
>   }
>   public String getTelephone()
>   {
>     return telephone;
>   }
> }
> 
>> Is there something in new versions of Java that can do these things faster?
> 
> What was wrong with earlier answers to this very question?
> 
>> Other thing is How much memory does a class take and a String will take.
> 
> That depends.
> 
>> Say I have an array of 1 million Employees.
>>
>> String[1million] How many MB this array will take?
> 
> That depends.
> 
>> EmployeeClass[1million] How many MB this array will take?
>>
>> {
>> Name:
>> Tel:
>> City:
>> Salary:
>> }
> 
> That's not Java.
> 
>> Is there a way to save memory for shorter Strings. Say having just 15 digit string? Or all strings are of 256 char size?
> 
> 'String's are of varying length, and we don't call the characters 
> in a 'String' "digits". 
>  
> Read the Java tutorials.
> 
> RTFM.
> 
>> How much Max memory an Applet can take in an ordinary computer.
> 
> That depends.
>  
>> If a Computer has 1 GB RAM can my applet utilize all that RAM? or the Browser will only give a few 
> 
> No.
> 
>> MB? Is there any way to request more memory by Applet from web-Browser if Available RAM in Computer is 2GB or 4GB?
> 
> No.
> 
>> How can my Applet know how much Memory is available to the applet?
> 
> There are some calls in the API, but it smells like this is the wrong 
> approach.
> 
> Your applet should not care.
> 
>> How can an Applet know how many cores are present in System and assign each thread to a separate Core?
> 
> It cannot.
> 
> It should not.
> 
> Some of what you're asking you already asked and got answers.
> 
> Why are you asking again?
> 
> Did you read the earlier answers?
> 
> Why not?
> 

For some reason, there is no text shown in Thunderbird for your (Lew's)
message, which I am commenting on, but the text shows, quoted, when I
compose the comment. It looks like Google Groups does not convert from
HTML to text/plain correctly. My message window for Lew's reply shows
the same header as Sanny's message, and no text. Some structural error
in the mbox-formatted inbox for this group, it seems.



-- 
Lars Enderin

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Thread

Updating code from jdk1.2 to recent jdk SE 1.6 Sanny <softtanks22@hotmail.com> - 2012-07-10 10:07 -0700
  Re: Updating code from jdk1.2 to recent jdk SE 1.6 Lew <lewbloch@gmail.com> - 2012-07-10 11:26 -0700
    Re: Updating code from jdk1.2 to recent jdk SE 1.6 Luuk <luuk@invalid.lan> - 2012-07-10 20:32 +0200
      Re: Updating code from jdk1.2 to recent jdk SE 1.6 Lew <lewbloch@gmail.com> - 2012-07-10 11:56 -0700
        Re: Updating code from jdk1.2 to recent jdk SE 1.6 Luuk <luuk@invalid.lan> - 2012-07-10 21:05 +0200
          Re: Updating code from jdk1.2 to recent jdk SE 1.6 Lew <lewbloch@gmail.com> - 2012-07-10 12:56 -0700
          Re: Updating code from jdk1.2 to recent jdk SE 1.6 Roedy Green <see_website@mindprod.com.invalid> - 2012-07-11 15:19 -0700
            Re: Updating code from jdk1.2 to recent jdk SE 1.6 Lew <lewbloch@gmail.com> - 2012-07-11 15:50 -0700
              Re: Updating code from jdk1.2 to recent jdk SE 1.6 Gene Wirchenko <genew@ocis.net> - 2012-07-11 16:41 -0700
                Re: Updating code from jdk1.2 to recent jdk SE 1.6 Lew <lewbloch@gmail.com> - 2012-07-11 17:03 -0700
            Re: Updating code from jdk1.2 to recent jdk SE 1.6 Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2012-07-12 00:51 +0200
        Re: Updating code from jdk1.2 to recent jdk SE 1.6 Arne Vajhøj <arne@vajhoej.dk> - 2012-07-11 23:13 -0400
    Re: Updating code from jdk1.2 to recent jdk SE 1.6 Sanny <softtanks22@hotmail.com> - 2012-07-11 00:27 -0700
      Re: Updating code from jdk1.2 to recent jdk SE 1.6 Silvio Bierman <silvio@moc.com> - 2012-07-11 13:12 +0200
      Re: Updating code from jdk1.2 to recent jdk SE 1.6 Lew <lewbloch@gmail.com> - 2012-07-11 14:02 -0700
        Re: Updating code from jdk1.2 to recent jdk SE 1.6 Lars Enderin <lars.enderin@telia.com> - 2012-07-12 00:06 +0200
          OT Google Groups formatting.  Was Re: Updating code from jdk1.2 to recent jdk SE 1.6 markspace <-@.> - 2012-07-11 15:16 -0700
            Re: OT Google Groups formatting.  Was Re: Updating code from jdk1.2 to recent jdk SE 1.6 Lars Enderin <lars.enderin@telia.com> - 2012-07-12 11:00 +0200
              Re: OT Google Groups formatting.  Was Re: Updating code from jdk1.2 to recent jdk SE 1.6 markspace <-@.> - 2012-07-12 10:36 -0700
        Re: Updating code from jdk1.2 to recent jdk SE 1.6 Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2012-07-12 00:54 +0200
          Re: Updating code from jdk1.2 to recent jdk SE 1.6 Lew <lewbloch@gmail.com> - 2012-07-11 16:25 -0700
  Re: Updating code from jdk1.2 to recent jdk SE 1.6 Roedy Green <see_website@mindprod.com.invalid> - 2012-07-11 15:15 -0700

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