Passing parametrized ArrayList to a function in java
Posted
by user150505
on Stack Overflow
See other posts from Stack Overflow
or by user150505
Published on 2010-03-20T06:29:03Z
Indexed on
2010/03/20
6:31 UTC
Read the original article
Hit count: 413
I have the following fucntion.
func(ArrayList <String> name) { ........ }
The function fills the ArrayList. (I don't want to return the ArrayList)
However, in the caller function the ArrayList obtained has all items of ArrayList as null.
For eg.
1 name = new ArrayList[num];
2 func(name);
3 System.out.println(name[0]);
I get NullPointerException at line 3. Is this because of line 1, i.e. I am not parametrizing? If yes, is there another way this can be done? Because java does not allow creating a generic array of parametrized ArrayList.
© Stack Overflow or respective owner
