ArrayList Implementation

[Remaan Rem]

Hi Everyone ;

In fact am having problems with creating class based on an array-based class. The class should be implemented using
Arraylist class.

So : my question is : do I have to create an array ?
if so what will be the benefit of it ?

Do I have to use any of these statements :
List <DictEntry> ListDictionary = new ArrayList <DictEntry>();

ArrayList D = new ArrayList ();

[salvin francis]

First of all Welcome to CodeRanch !

as I see, your naming conventions for the variables is bad,

eg:

List <DictEntry> listDictionary = new ArrayList <DictEntry>();
ArrayList d = new ArrayList (); //-- a better name perhaps ?

Could you explain this statement so that i can help you better ?:

... creating class based on an array-based class. The class should be implemented using Arraylist class.

[Remaan Rem]

Thanks a lot for welcoming me =) ..

The Assignment is asking to create a new class based on an existing class. The old (existing) one implemented using array data structure , the new one should be implemented using ArrayList. So, I am not very sure what importing statements should I have.

Remaan >

[Henry Wong]

Remaan Rem wrote:
The Assignment is asking to create a new class based on an existing class. The old (existing) one implemented using array data structure , the new one should be implemented using ArrayList. So, I am not very sure what importing statements should I have.

Although ArrayList has "array" as part of its name -- ArrayList and arrays are completely different. And hence, are used differently.

There is no simple generic cut-n-paste solution. You will need to go through the code, and logically convert it.

Henry

[Remaan Rem]

So what will be the correct statement ?

List <DictEntry> ListDictionary = new ArrayList <DictEntry>();

[Wouter Oet]

The statement is correct however the Java Naming convention states that variables should start with a lower-case character.

[Remaan Rem]

Ok.. but does it serve the aim of the the new class ?

[Henry Wong]

Remaan Rem wrote:
Ok.. but does it serve the aim of the the new class ?

We don't know how your old class uses arrays. We don't know how you plan to convert the arrays to use arraylists. I don't see how we can tell you whether a line of code can "serve the aim" of a new class. And even if we could, how can we do it better than someone who is going to do the conversion?

Henry

[Remaan Rem]

Ya I agree with you.

The old class - has an array which is a dictionary filled with elements of type (DictEntry) .

What I meant by " serve the aim" is : to create a new arrayList object to be used

instead of the old array, ( serving as dictionary).

Thank you =)