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Text lesson

set()

Example

Substitute an item in a list.

import java.util.ArrayList;

public class Main {
  public static void main(String[] args) {
    ArrayList<String> cars = new ArrayList<String>();
    cars.add("Volvo");
    cars.add("BMW");
    cars.add("Ford");
    cars.add("Mazda");
    cars.set(0, "Opel");
    System.out.println(cars);
  } 
}

Definition and Usage

The set() method replaces an item at a specified position in the list and returns the item previously at that position.

Syntax

public T set(int index, T item)

T denotes the data type of the items in the list.

Parameter Values

Parameter	Description
index	Required: The index of the item to be replaced.
item	Required: The new item to be inserted at the specified position.

Technical Details

Returns:	The item that was previously located at the specified position in the list.
Throws:	IndexOutOfBoundsException occurs if the index is negative, equal to the list’s size, or greater than the list’s size.