Optional orElse() method in Java with examples
Last Updated :
30 Jul, 2019
The orElse() method of java.util.Optional class in Java is used to get the value of this Optional instance, if present. If there is no value present in this Optional instance, then this method returns the specified value.
Syntax:
public T orElse(T value)
Parameters: This method accepts value as a parameter of type T to return if there is no value present in this Optional instance.
Return value: This method returns the value of this Optional instance, if present. If there is no value present in this Optional instance, then this method returns the specified value.
Below programs illustrate orElse() method:
Program 1:
import java.util.*;
public class GFG {
public static void main(String[] args)
{
Optional<Integer> op
= Optional.of(9455);
System.out.println("Optional: "
+ op);
System.out.println("Value by orElse"
+ "(100) method: "
+ op.orElse(100));
}
}
|
Output:
Optional: Optional[9455]
Value by orElse(100) method: 9455
Program 2:
import java.util.*;
public class GFG {
public static void main(String[] args)
{
Optional<Integer> op
= Optional.empty();
System.out.println("Optional: "
+ op);
try {
System.out.println("Value by orElse"
+ "(100) method: "
+ op.orElse(100));
}
catch (Exception e) {
System.out.println(e);
}
}
}
|
Output:
Optional: Optional.empty
Value by orElse(100) method: 100
Reference: https://docs.oracle.com/javase/9/docs/api/java/util/Optional.html#orElse-T-
Like Article
Suggest improvement
Share your thoughts in the comments
Please Login to comment...