Optional toString() method in Java with examples
Last Updated :
30 Jul, 2019
The toString() method of java.util.Optional class in Java is used to get the string representation of this Optional instance.
Syntax:
public String toString()
Parameters: This method accepts nothing.
Return value: This method returns the string representation of this Optional instance.
Below programs illustrate toString() method:
Program 1:
import java.util.*;
public class GFG {
public static void main(String[] args)
{
Optional<Integer> op
= Optional.of( 452146 );
String value = op.toString();
System.out.println( "String Representation: "
+ value);
}
}
|
Output:
String Representation: Optional[452146]
Program 2:
import java.util.Optional;
public class GFG {
public static void main(String[] args)
{
Optional<Integer> op
= Optional.empty();
String value = op.toString();
System.out.println( "String Representation: "
+ value);
}
}
|
Output:
String Representation: Optional.empty
References: https://docs.oracle.com/javase/9/docs/api/java/util/Optional.html#toString–
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