OptionalLong isPresent() method in Java with examples
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:
import java.util.OptionalLong;
public class GFG {
public static void main(String[] args)
{
OptionalLong opLong
= OptionalLong.of( 45213246 );
System.out.println( "OptionalLong "
+ "has a value= "
+ opLong.isPresent());
}
}
|
Output:
OptionalLong has a value= true
Program 2:
import java.util.OptionalLong;
public class GFG {
public static void main(String[] args)
{
OptionalLong opLong = OptionalLong.empty();
boolean response = opLong.isPresent();
if (response)
System.out.println( "Value present" );
else
System.out.println( "Value absent" );
}
}
|
References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalLong.html#isPresent()
Last Updated :
01 May, 2019
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