OptionalLong of(long) method in Java with examples

The of(long) method help us to get an OptionalLong object which contains a long value which is passed as a parameter to this method.

Syntax:

public static OptionalLong of(long value)

Parameters: This method accepts a long value as parameter that will be set to the returned OptionalLong object.



Return value: This method returns an OptionalLong with the value present.

Below programs illustrate of(long) method:
Program 1:

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// Java program to demonstrate
// OptionalLong.of(long) method
  
import java.util.OptionalLong;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Create a OptionalLong instance
        // using of() method
        OptionalLong opLong
            = OptionalLong.of(45213246);
  
        // Get value of this OptionalLong instance
        System.out.println("OptionalLong: "
                           + opLong);
    }
}

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Output:

OptionalLong: OptionalLong[45213246]

Program 2:

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// Java program to demonstrate
// OptionalLong.of(long) method
  
import java.util.OptionalLong;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Create a OptionalLong instance
        // using of() method
        OptionalLong opLong
            = OptionalLong.of(21438999);
  
        // Get value of this OptionalLong instance
        System.out.println("OptionalLong: "
                           + opLong);
    }
}

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Output:

OptionalLong: OptionalLong[21438999]

References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalLong.html#of(long)




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