OptionalInt ifPresent(IntConsumer) method in Java with examples
The ifPresent(java.util.function.IntConsumer) method helps us to perform the specified IntConsumer action the value of this OptionalInt object. If a value is not present in this OptionalInt, then this method does nothing.
Syntax:
public void ifPresent(IntConsumer action)
Parameters: This method accepts a parameter action which is the action to be performed on this Optional, if a value is present.
Return value: This method returns nothing.
Exception: This method throw NullPointerException if a value is present and the given action is null.
Below programs illustrate ifPresent(IntConsumer) method:
Program 1:
Java
import java.util.OptionalInt;
public class GFG {
public static void main(String[] args)
{
OptionalInt opint = OptionalInt.of( 2234 );
opint.ifPresent((value) -> {
value = value * 2 ;
System.out.println("Value after modification:=> "
+ value);
});
}
}
|
Output: Program 2:
Java
import java.util.OptionalInt;
public class GFG {
public static void main(String[] args)
{
OptionalInt opint = OptionalInt.empty();
opint.ifPresent((value) -> {
value = value * 2 ;
System.out.println("Value after modification:=> "
+ value);
});
System.out.println("As OptionalInt is empty value"
+ " is not modified");
}
}
|
Output: References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalInt.html#ifPresent(java.util.function.IntConsumer)
Last Updated :
14 Apr, 2023
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