Empty ArrayList

[Kaustubh G Sharma]

ArrayList a = new ArrayList(100);
for(int i=0;i<a.size();i++)
{
S.o.p("the elements are="+a.get(i));
}

output---it prints nothing ...
it has no elements so it is empty till end but it is not even printing the string attached with it...
can anyone provide me the reason for this behaviour??

[Christophe Verré]

but it is not even printing the string attached with it

new ArrayList(100) doesn't mean that the list has 100 items.

API wrote:public ArrayList(int initialCapacity)
Constructs an empty list with the specified initial capacity.

It doesn't enter the loop. Why would it print the message ?

[David O'Meara]

This is an ArrayList, not an Array.
While you have defined the initial capacity, it is still empty until you put something in it.
The initial capacity is used for determining the supported size behind the scenes so that you can reduce the time spent resizing the data structure behind the scenes if you already know (or have a good idea of) the number of items going into the ArrayList

[Kaustubh G Sharma]

Got it ...Thanks Guys