help with arrayList urgent

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2 total messages Started by someguy Mon, 22 May 2000 00:00

#699

Author: someguy
Date: Mon, 22 May 2000 00:00

18 lines
1782 bytes

greetings

I have created an arraylist, which i have used to store objects of a purpose
desinged class that holds a string and integer, and the toString returns
both in a string "ie return(myString +myInteger);".  I would like to know
how to access the methods of my class from the arraylist.

ie myArrayList.get(index).someMethodFromMyClass

Interstingly enough, i can create new objects and add them to my list.  I
can get the values of these objects, but i cant invoke methods built into
them to modify their values.

The reason i have used arraylist is so that i dont have define the size of
the arraylist - and for what i am doing this is an advantage.  However if
you have any better ideas then i would be glad to hear them.

Please if you know how i can access these method i would appreciate it.

Re: help with arrayList urgent

#704

Author: Steve Strongheart
Date: Mon, 22 May 2000 00:00

36 lines
2176 bytes

sumguy ~
    You need to cast the java.lang.Object returned from myArrayList.get(int)
into an Object that has the desired method.

 (myClass)   myArrayList.get(int).someMethod()
assuming the Object is castable to  myClass and that myClass contains
#someMethod()

~S~

someguy <someguy@somewhere.com> wrote in message
news:958986598.802617@brs.ihug.com.au...
> greetings
>
> I have created an arraylist, which i have used to store objects of a
purpose
> desinged class that holds a string and integer, and the toString returns
> both in a string "ie return(myString +myInteger);".  I would like to know
> how to access the methods of my class from the arraylist.
>
> ie myArrayList.get(index).someMethodFromMyClass
>
> Interstingly enough, i can create new objects and add them to my list.  I
> can get the values of these objects, but i cant invoke methods built into
> them to modify their values.
>
> The reason i have used arraylist is so that i dont have define the size of
> the arraylist - and for what i am doing this is an advantage.  However if
> you have any better ideas then i would be glad to hear them.
>
> Please if you know how i can access these method i would appreciate it.
>
>
>
>
>

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