Optional get() method in Java with examples
Last Updated :
30 Jul, 2019
The get() method of java.util.Optional class in Java is used to get the value of this Optional instance. If there is no value present in this Optional instance, then this method throws NullPointerException.
Syntax:
public T get()
Parameters: This method do not accept any parameter.
Return value: This method returns the value of this instance of the Optional class.
Exception: This method throws NoSuchElementExcpetion if there is no value present in this Optional instance.
Below programs illustrate get() 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 of this Optional: "
+ op.get());
}
}
|
Output:
Optional: Optional[9455]
Value of this Optional: 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 of "
+ "this Optional: "
+ op.get());
}
catch (Exception e) {
System.out.println(e);
}
}
}
|
Output:
Optional: Optional.empty
java.util.NoSuchElementException: No value present
Reference: https://docs.oracle.com/javase/9/docs/api/java/util/Optional.html#get–
Like Article
Suggest improvement
Share your thoughts in the comments
Please Login to comment...