The set() method of java.util.ArrayList class is used to replace the element at the specified position in this list with the specified element.
Syntax:
public E set(int index, E element)
Parameters: This method takes the following argument as a parameter.
- index- index of the element to replace
- element- element to be stored at the specified position
Returns Value: This method returns the element previously at the specified position.
Exception: This method throws IndexOutOfBoundsException if the index is not within the size range of the ArrayList.
Below are the examples to illustrate the set() method.
Example 1:
// Java program to demonstrate// set() method// for Integer value import java.util.*; public class GFG1 { public static void main(String[] argv) throws Exception { try { // Creating object of ArrayList<Integer> ArrayList<Integer> arrlist = new ArrayList<Integer>(); // Populating arrlist1 arrlist.add(1); arrlist.add(2); arrlist.add(3); arrlist.add(4); arrlist.add(5); // print arrlist System.out.println("Before operation: " + arrlist); // Replacing element at the index 3 with 30 // using method set() int i = arrlist.set(3, 30); // Print the modified arrlist System.out.println("After operation: " + arrlist); // Print the Replaced element System.out.println("Replaced element: " + i); } catch (IndexOutOfBoundsException e) { System.out.println("Exception thrown: " + e); } }} |
Output:
Before operation : [1, 2, 3, 4, 5] After operation : [1, 2, 3, 30, 5] Replaced element : 4
Example 2: For IndexOutOfBoundsException
// Java program to demonstrate// set() method// for IndexOutOfBoundsException import java.util.*; public class GFG1 { public static void main(String[] argv) throws Exception { try { // Creating object of ArrayList<Integer> ArrayList<Integer> arrlist = new ArrayList<Integer>(); // Populating arrlist1 arrlist.add(1); arrlist.add(2); arrlist.add(3); arrlist.add(4); arrlist.add(5); // print arrlist System.out.println("Before operation : " + arrlist); // Replacing element at the index 7 with 30 // using method set() System.out.println("\nTrying to Replace" + " the element at" + " (index > Capacity) "); int i = arrlist.set(7, 30); // Print the modified arrlist System.out.println("After operation: " + arrlist); // Print the Replaced element System.out.println("Replaced element: " + i); } catch (IndexOutOfBoundsException e) { System.out.println("Exception thrown : " + e); } }} |
Output:
Before operation : [1, 2, 3, 4, 5] Trying to Replace the element at (index > Capacity) Exception thrown : java.lang.IndexOutOfBoundsException: Index: 7, Size: 5
