OptionalInt help us to create an object which may or may not contain a Int value. The orElseThrow() method help us to get the int value and if int value is not present then this method will throw NoSuchElementException. Syntax:
public Int orElseThrow()
Parameters: This method accepts nothing. Return value: This method returns the Int value described by this OptionalInt. Exception: This method throws NoSuchElementException if no value is present Below programs illustrate orElseThrow() method: Program 1:
Java
// Java program to demonstrate// OptionalInt.orElseThrow() methodimport java.util.OptionalInt;public class GFG { public static void main(String[] args) { // create a OptionalInt OptionalInt opInt = OptionalInt.of(12345); // get value using orElseThrow() System.out.println("int Value extracted using" + " orElseThrow() = " + opInt.orElseThrow()); }} |
Output:
int Value extracted using orElseThrow() = 12345
Program 2:
Java
// Java program to demonstrate// OptionalInt.orElseThrow() methodimport java.util.OptionalInt;public class GFG { public static void main(String[] args) { // create a OptionalInt OptionalInt opInt = OptionalInt.empty(); try { // try to get value from empty OptionalInt int value = opInt.orElseThrow(); } catch (Exception e) { System.out.println("Exception thrown : " + e); } }} |
Output:
Exception thrown : java.util.NoSuchElementException: No value present
References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalInt.html#orElseThrow()
