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Optional empty() method in Java with examples

  • Last Updated : 30 Jul, 2019

The empty() method of java.util.Optional class in Java is used to get an empty instance of this Optional class. This instance do not contain any value.

Syntax:

public static <T> 
  Optional<T> empty()

Parameters: This method accepts nothing.

Return value: This method returns an empty instance of this Optional class.

Below programs illustrate empty() method:
Program 1:






// Java program to demonstrate
// Optional.empty() method
  
import java.util.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // create a Optional
        Optional<Integer> op
            = Optional.empty();
  
        // print value
        System.out.println("Optional: "
                           + op);
    }
}
Output:
Optional: Optional.empty

Program 2:




// Java program to demonstrate
// Optional.empty() method
  
import java.util.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // create a Optional
        Optional<String> op
            = Optional.empty();
  
        // print value
        System.out.println("Optional: "
                           + op);
    }
}
Output:
Optional: Optional.empty

Reference: https://docs.oracle.com/javase/9/docs/api/java/util/Optional.html#empty–

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