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Author

Sorting an arraylist of arrays

Stuart Forbes
Greenhorn

Joined: Apr 26, 2005
Posts: 1
I have an ArrayList, which contains X amount of String[]s. Each string array has stuff like Name, Surname, Address, Town, etc.

I want to be able to sort the ArrayList of arrays, by a specified entry in each array. name, or surname, or... etc. I assume there would be a sort method, which would take a parameter searchBy or something like that.

What would be the best way to do this?

Thanks in advance for any help.
Paul Sturrock
Bartender

Joined: Apr 14, 2004
Posts: 10336

I assume you can guarentee the ordering of you String arrays? So you know that surname is always element 2 for example?

What you could do is write a Comparator which has an extra property which represents the element in your String array you want to use to sort your List by. Then you could use Collections.sort(List list, Comparator c).
[ April 26, 2005: Message edited by: Paul Sturrock ]

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Lionel Badiou
Ranch Hand

Joined: Jan 06, 2005
Posts: 140
Hello Stuart,

You might try to:
1- Write your own Comparator (that compares two entries in your ArrayList)
2- Use Collections.sort(myArraylist, myComparator)

You may find details on Comparator
here

Best regards,


Lionel Badiou
CodeFutures Software
 
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
 
subject: Sorting an arraylist of arrays