[java] Java ArrayList replace at specific index

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 do I proceed?

public void replaceBulb(int index, Bulbs theBulb) {

}

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.

Lets get array list as ArrayList and new value as value all you need to do is pass the parameters to .set method. ArrayList.set(index,value)

Ex -

ArrayList.set(10,"new value or object")

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

We can replace element in arraylist using ArrayList Set() method.We are a example for this as below.

Create Arraylist

 ArrayList<String> arr = new ArrayList<String>();
 arr.add("c");
 arr.add("php");
 arr.add("html");
 arr.add("java");

Now replcae Element on index 2

 arr.set(2,"Mysql");
 System.out.println("after replace arrayList is = " + arr);

OutPut :

 after replace arrayList is = [c, php, Mysql, java]

Reference :

Replace element in ArrayList

Use the set() method: see doc

arraylist.set(index,newvalue);

Use ArrayList.set

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