ArrayList of ArrayLists

[Dipke]

Hi,

I need to put data from a file into several ArrayList.
But the number of ArrayList is not known
Can i create an ArrayList in witch i put ArrayList<String> ?
If yes, how do i do that ?

Kind regards
Dipke

[mi14chal]

ArrayList<String> s = new ArrayList<String>();
        s.add("test");
        ArrayList<ArrayList> a = new ArrayList<ArrayList>();
        a.add(s);

[Dipke]

Thanks,

Just what i am looking for

[Hibernate]

ArrayList<String> s = new ArrayList<String>();
s.add("test");
ArrayList<ArrayList<String>> a = new ArrayList<ArrayList<String>>();
a.add(s);

is better, otherwise 'a' is ArrayList<ArrayList<?>>, which I think only have disadvantages over ArrayList<ArrayList<Object>>.

[Dipke]

Hello,

I had already tried

ArrayList<ArrayList<String>> a

bur each time i had an arror.
Now it is working, so that means that i made a syntax error when trying.

Many thanks to all and a happy newyear.

Dipke