ArrayList<Double> insertion(java)

Question

how should i insert a double into a specific part of ArrayList? for example we have a ArrayList with ten doubles each one with the 0 value we want to make the sixth place 10, how should we do that?

Answer 1

Use ArrayList.set() method:

public E set(int index,
             E element)

Replaces the element at the specified position in this list
with the specified element.

For example:

list.set(5, new Double(10));

Answer 2

Just used the indexed add .

list.add(6, 10D);

EDIT:

But if you want to replace the value at the specified index (instead of inserting a new one), I suggesst you follow @hmjd's solution.

Answer 3

See the documentation: http://docs.oracle.com/javase/1.4.2/docs/api/java/util/ArrayList.html

void add(int index, Object element);

Inserts the specified element at the specified position in this list.