OptionalInt help us to create an object which may or may not contain a Int value. The isPresent() method help us to get the answer that Int value is present in OptionalInt object or not. If an int value is present in this object, this method returns true, otherwise false.
Syntax:
public boolean isPresent()
Parameters: This method accepts nothing.
Return value: This method returns true if an int value is present, otherwise false
Below programs illustrate isPresent() method:
Program 1:
// Java program to demonstrate// OptionalInt.isPresent() method import java.util.OptionalInt; public class GFG { public static void main(String[] args) { // create a OptionalInt OptionalInt opInt = OptionalInt.of(12345); // get value using isPresent() System.out.println("OptionalInt has a value= " + opInt.isPresent()); }} |
Output:
OptionalInt has a value= true
Program 2:
// Java program to demonstrate// OptionalInt.isPresent() method import java.util.OptionalInt; public class GFG { public static void main(String[] args) { // create a OptionalInt OptionalInt opInt = OptionalInt.empty(); // try to get that value is present or not boolean response = opInt.isPresent(); if (response) System.out.println("Value present"); else System.out.println("Value absent"); }} |
Output:
Value absent
References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalInt.html#isPresent()
