The orElseGet(java.util.function.IntSupplier) method helps us to get the value in this OptionalInt object. If a value is not present in this OptionalInt, then this method returns the result produced by the supplying function, passed as the parameter
Syntax:
public int orElseGet(IntSupplier supplier)
Parameters: This method accepts the supplying function that produces a value to be returned.
Return value: This method returns the int value, if present, otherwise the result produced by the supplying function.
Exception: This method throw NullPointerException if no value is present and the supplying function is null.
Below programs illustrate orElseGet(java.util.function.IntSupplier) method:
Program 1:
// Java program to demonstrate// OptionalInt.orElseGet(IntSupplier) method import java.util.OptionalInt; public class GFG { public static void main(String[] args) { // create a OptionalInt OptionalInt opint = OptionalInt.of(2134); // get value using orElseGet int value = opint.orElseGet(() -> getintValue()); // print value System.out.println("value: " + value); } public static int getintValue() { return 3242 + 123; }} |
Output:
value: 2134
Program 2:
// Java program to demonstrate// OptionalInt.orElseGet(IntSupplier) method import java.util.OptionalInt; public class GFG { public static void main(String[] args) { // create a OptionalInt OptionalInt opint = OptionalInt.empty(); // get value using orElseGet int value = opint.orElseGet(() -> getintValue()); // print value System.out.println("value: " + value); } public static int getintValue() { return 3242 * 234; }} |
Output:
value: 758628
