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
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