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turboliux

Wed Jan 04, 2006 3:30 pm


creating Objects: how to have n objects?

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ok, i m doing this program dossier thing where i need to create my own program. so i decided to have a organizer, maybe some kind of KOrganizer (KDE, Linux) but simplified. well i pretty much know how it gonna look like (GUI), but i dont know how to its gonna work, how it should be designed. so i'm stuck with system design.
...so far i know what i will have Linked List with Nodes. each node will have an object and a reference to next object. and this object i will call "Row". Row will have different information: 
      | year | month | day | noteID |   note                 |
      --------------------------------------------------------
row1  | 2005 | Janua | 03  |   01   | need to buy...         |
row2  | 2005 | Janua | 04  |   02   |  meet John tmrw at...  |
the trick is that the user makes as many notes as he wants. so i cannot make objects for him, there can be 'n' objects. is there a method in java where, when you have lets say Row row1;
Row row2;
//and then user clicks on the button or clicks on the text field, etc.
Row row3;
how to allow the user create new object?


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wtd

Wed Jan 04, 2006 4:53 pm



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An ArrayList perhaps.


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turboliux

Thu Jan 05, 2006 5:19 am



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so each time the user enters new note, he adds new object to list?ArrayList list = new ArrayList();
//when user enters new note:
list.add(new Row(foobar));.... so is it an array or list? kinda confused


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turboliux

Thu Jan 05, 2006 6:01 am



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whats the difference between LinkedList and ArrayList?
and also, in requirements it says:
"ADT name: Lists, implemented using references (that is, a dynamically linked list)."


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Andy

Thu Jan 05, 2006 11:36 am



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yea i tihnk they want u to impliment the list ADT using linked lists, its not too bad... a doubly linked list would work just fine for your situation