The isPresent() function in Optional Class is used to evaluate whether the value if assigned to variable is present or not.
Syntax
value.isPresent() Returns: It returns true if value is assigned otherwise false
Examples:
Input : Optional value1 = Optional.ofNullable(10);
value1.isPresent()
Output : True
Input : Optional value2 = Optional.ofNullable(null);
value2.isPresent()
Output : False
// Write Java code hereimport java.util.Optional;public class present {public static void main(String args[]) {      // Optional.ofNullable - allows passed    // parameter to be not null.    Optional<Integer> value1 = Optional.ofNullable(10);      // Optional.ofNullable - allows passed    // parameter to be null.    Optional<Integer> value2 = Optional.ofNullable(null);    System.out.println("First parameter is present:" +                        value1.isPresent());    System.out.println("Second parameter is present:" +                        value2.isPresent());}} |
Output : true Output : false
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