# Sort a list alphabetically and split it into groups (From A to E, From F to J....)

• 12-20-2011, 04:02 PM
solariums
Sort a list alphabetically and split it into groups (From A to E, From F to J....)
Hi,

I have an arraylist which I have to sort in an alphebetical order then I have to split it into 5 sets
- set 1 containing list of words between A and E
- set 2 containing list of words between F and J
- set 3 containing list of words between K and O
- set 4 containing list of words between P and T
- set 5 containing list of words between U and Z

Also, there are some elements in the arraylist which start with a number, I have to have another set
- set 6 containing list of between 0 and 9

• 12-20-2011, 04:07 PM
KevinWorkman
Re: Sort a list alphabetically and split it into groups (From A to E, From F to J....
What have you tried? Where are you stuck? How would you do this by hand, without a computer?
• 12-20-2011, 04:35 PM
solariums
Re: Sort a list alphabetically and split it into groups (From A to E, From F to J....
Thanks for your reply. I can sort the list alphabetically using the collection interface on List
ArrayList<String> ParamList = new ArrayList<String>();
Now what I want is a way to filter the list. I would like to create sublists of alphabet by spliting the 26 letters of the alphabet into 5 sublists
From A and E contains all strings starting with A, B, C, D or E
From F and J contains all strings starting with F, G, H, I or J
From K and O contains all strings starting with K, L, M, N or O
From P and T contains all strings starting with P, Q, R, S or T
From U and Z contains all strings starting with U, V, W, X, Y or Z

This is to allow easier searh, instead of displaying the whole list of data, I first want to filter in order to avoid displaying a long list.
• 12-20-2011, 04:48 PM
solariums
Re: Sort a list alphabetically and split it into groups (From A to E, From F to J....
One way of doing this could be to declare 5 sublists and state that if for example:
a string starts with letter "A" then place it in list 1,
String starts with letter "G" then place it in list 2....

Or, we can create 26 lists, a list for each letter in the alphabet, then put its content if not empty in a new list

Thanks
• 12-20-2011, 05:22 PM
solariums
Re: Sort a list alphabetically and split it into groups (From A to E, From F to J....
In a clearer way:

I have a list of strings some begin with a number (eg. 6Kv, 9Hv) and some begin with a letter from the alphabet (eg. Aa, Clapet, Joint...)

I want to filter the data and create 6 sublists
List1 : contains all strings beginning with a number sorted from 0 to 9
List2 : contains all strings beginning with A, B, C, D, E
List3 : contains all strings beginning with F, G, H, I, J
List4 : contains all strings beginning with K, L, M, N, O
List5 : contains all strings beginning with U, V, W, X, Y, Z