ArrayList of ArrayLists

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

Code:

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

---

Thanks,

Just what i am looking for

Code:

---

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>>.

Hello,

I had already tried

Code:

---

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