Java classes comments

[majidmajid]

hi... i want to learn java..how to start up... i hve got knowledge of C,C++...
now plz assist....

[r035198x]

hi... i want to learn java..how to start up... i hve got knowledge of C,C++...
now plz assist....

Read this and also this

[shana07]

I have just finished reading your free java classes...
Your writing clear and good.
Hopefully after this I won't ask silly java question anymore :)
Thanks

[r035198x]

I have just finished reading your free java classes...
Your writing clear and good.
Hopefully after this I won't ask silly java question anymore :)
Thanks

Don't worry about asking silly questions.
That's how we all learn.

Thanks for taking time to read them.

[r035198x]

[font=Verdana][size=2]horace1 has done a good job with the next part of the lessons. [/size][/font]

[datman99]

I have a project that I want assistance with but can't see where to attach files. If anyone would like a java programming challenge let me know

Donald

[r035198x]

I have a project that I want assistance with but can't see where to attach files. If anyone would like a java programming challenge let me know

Donald

You'll get all the assistance you need if you are willing to be doing the work yourself. When you do get stuck with a particular problem, just start a new thread in the forum and the experts there will be glad to help.

[madhoriya22]

Post comments and questions on the java classes in this thread.

Hi r035198x,

Such a nice article on java basics......My question is regarding Abstract classes.......I f abstract classes dont have objects then what contructors are doing there.......... Here I am giving you the code snippet........ will u please explain it for me

DAOFactory mysqlFactory = DAOFactory.getDAOFactory(DAOFactory.MYSQL);//DAOFactory is a abstract class

//method getDAOFactory() is like this:-
 public static DAOFactory getDAOFactory(int whichFactory) {
        switch (whichFactory) {
    
            case 1:
            // return new OracleDAOFactory(dbSource);
            case 2:
            // return new SybaseDAOFactory(); 
            case 3:    
                return new MySqlDAOFactory();//MySqlDAOFactory is the class implementing DAOFactory                
            default:
                return null;
        }
    }

aren't we creating a abstract class object(mysqlFac tory) here.......
I am a bit confused here ........
Thanks,
madhoriya

[r035198x]

Hi r035198x,

Such a nice article on java basics......My question is regarding Abstract classes.......I f abstract classes dont have objects then what contructors are doing there.......... Here I am giving you the code snippet........ will u please explain it for me

DAOFactory mysqlFactory = DAOFactory.getDAOFactory(DAOFactory.MYSQL);//DAOFactory is a abstract class

//method getDAOFactory() is like this:-
 public static DAOFactory getDAOFactory(int whichFactory) {
        switch (whichFactory) {
    
            case 1:
            // return new OracleDAOFactory(dbSource);
            case 2:
            // return new SybaseDAOFactory(); 
            case 3:    
                return new MySqlDAOFactory();//MySqlDAOFactory is the class implementing DAOFactory                
            default:
                return null;
        }
    }

aren't we creating a abstract class object(mysqlFac tory) here.......
I am a bit confused here ........
Thanks,
madhoriya

Is DAOFactory an interface or a method? Even if it were an abstract class, what's being created there is a MySqlDAOFactory object which is being created from a non abstract class.

[JosAH]

Is DAOFactory an interface or a method? Even if it were an abstract class, what's being created there is a MySqlDAOFactory object which is being created from a non abstract class.

You must be having a bad hairday ;-) you can't return methods; DAOFactory is
either an abstract class or an interface. That snippet must be part of an abstract
factory and it returns the appropriate factory given some database indicator.

kind regards,

Jos

[madhoriya22]

Is DAOFactory an interface or a method? Even if it were an abstract class, what's being created there is a MySqlDAOFactory object which is being created from a non abstract class.

DAOFactory is a abstract class....I have already given that as comment.
One question is still there to be answered....Wha t is contructors doing in abstract class if we cant create object of that.....

regards,
madhoriya

[madhoriya22]

You must be having a bad hairday ;-) you can't return methods; DAOFactory is
either an abstract class or an interface. That snippet must be part of an abstract
factory and it returns the appropriate factory given some database indicator.

kind regards,

Jos

You are absolutely correct Jos.....
But why u people are keep guessing that what is DAOFactory....
I have already written that as comment in code that it is a abstract class....

Sorry I posted it twice......i dont know how to delete it.....as there is no option of deleting

[madhoriya22]

You must be having a bad hairday ;-) you can't return methods; DAOFactory is
either an abstract class or an interface. That snippet must be part of an abstract
factory and it returns the appropriate factory given some database indicator.

kind regards,

Jos

You are absolutely correct Jos.....
But why u people are keep guessing that what is DAOFactory....
I have already written that as comment in code that it is a abstract class....

Thanks and regards,
madhoriya

[r035198x]

You must be having a bad hairday ;-) you can't return methods; DAOFactory is
either an abstract class or an interface. That snippet must be part of an abstract
factory and it returns the appropriate factory given some database indicator.

kind regards,

Jos

I'm a good candiadate for the d word today.
I was going to type interface or abstract class.
Sorry about that.
@OP.I just wanted to know whether DAOFactory was an interface or an abstract class. But that doesn't matter anyway in this case.
I hope you've been answered?

[JosAH]

I'm a good candiadate for the d word today.
I was going to type interface or abstract class.
Sorry about that.

No need to apologize; I suffer from the same dexter-sapiens syndrome too now
and then: my fingers start thinking for themselves and think they know better:
I want to type "make", my fingers type "main", I want to type "do" and my
fingers complete it as "double" etc. etc.

Silly fingers,

kill -9 register,

Java ;-)