How to dynamically fill a String[] Array with a File/Database

Question

fellow programmers: So I know how to fill a String[] Array with fixed entries like this:

String[] restaurants = new String[] { "McDonalds", "KFC", "Tacos", "Something", "Huh", "WTF"};

But thing is: -I need to read data from a File or a Database -I need a String[] for a ListAdapter -I cannot fix the size of the Array, because I don't know the amount of data i'm going to receive

I have been searching in the web about this, but i'm unable to find the answer. Can anyone point me in the right direction? Thanks in advance :D

Stephen C · Accepted Answer · 2011-05-03 01:08:27Z

1

If you don't know how many entries you will need to read, read them into a List and then convert the list to an array when you are done; e.g.

    List<String> l = ...
    // read list
    String[] restaurants = l.toArray(new String[l.size()]);

answered May 3, 2011 at 1:08

Stephen C

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3 Comments

CodeKrieger Over a year ago

Sorry for being a noob but when I add List<String> list; it needs to be initialized, how do I do that?

mre Over a year ago

@CodeKrieger: List of implementing classes (e.g. l = new ArrayList<String>())

koool Over a year ago

@CodeKrieger: if you go through the link in my answer there is a very similar example of what you are trying to achieve

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