Java ArrayList replace at specific index

Question

I need help with this java please. I created an ArrayList of bulbs, and I\'m trying to replace a bulb at specific index with another bulb. So with the following heading, how

Answer 1

Check out the set(int index, E element) method in the List interface

Answer 2

Use ArrayList.set

Answer 3

You can replace the items at specific position using set method of ArrayList as below:

list.set( your_index, your_item );

But the element should be present at the index you are passing inside set() method else it will throw exception.

Answer 4

Use the set() method: see doc

arraylist.set(index,newvalue);

Answer 5

public void setItem(List<Item> dataEntity, Item item) {
    int itemIndex = dataEntity.indexOf(item);
    if (itemIndex != -1) {
        dataEntity.set(itemIndex, item);
    }
}