OptionalLong isPresent() method in Java with examples

Last Updated : 01 May, 2019

OptionalLong help us to create an object which may or may not contain a Long value. The isPresent() method help us to get the answer that a value is present in OptionalLong object or not. If a long value is present in this object, this method returns true, otherwise false.

Syntax:

public boolean isPresent()

Parameters: This method accepts nothing.

Return value: This method returns true if a value is present, otherwise false

Below programs illustrate isPresent() method:
Program 1:

// Java program to demonstrate 
// OptionalLong.isPresent() method 
  
import java.util.OptionalLong; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // create a OptionalLong 
        OptionalLong opLong 
            = OptionalLong.of(45213246); 
  
        // get value using isPresent() 
        System.out.println("OptionalLong "
                           + "has a value= "
                           + opLong.isPresent()); 
    } 
} 

Output:

OptionalLong has a value= true

Program 2:

// Java program to demonstrate 
// OptionalLong.isPresent() method 
  
import java.util.OptionalLong; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // create a OptionalLong 
        OptionalLong opLong = OptionalLong.empty(); 
  
        // try to get that value is present or not 
        boolean response = opLong.isPresent(); 
  
        if (response) 
            System.out.println("Value present"); 
        else
            System.out.println("Value absent"); 
    } 
} 