LongSupplier Interface is a part of the java.util.function package which is introduced in Java 8. It is an in-built Functional Interface. This function doesn’t expect any input but produces a long-valued output. In this post, we are going to see several implementations of LongSupplier Interface by using different examples.
LongSupplier Interface in Java 8 Examples...!!! Share on X
Look at LongSupplier Javadoc description below:
As you’ve seen in the above screenshot, LongSupplier Interface contains only the following function:
long getAsLong();
This method represents a supplier of long-valued results. This is the
long-producing primitive specialization of Supplier.
Example:
import java.util.function.LongSupplier;
public class LongSupplierInterfaceJava8Example {
public static void main(String[] args) {
System.out.println("LongSupplier Interface - 'getAsLong' example \n");
double x = 10;
double y = 50;
LongSupplier longSupplierObj1 = () -> (long) x;
System.out.println("Result Obj1: " + longSupplierObj1.getAsLong());
LongSupplier longSupplierObj2 = () -> (long) x * (long) y;
System.out.println("Result Obj2: " + longSupplierObj2.getAsLong());
}
}
Java 8 LongSupplier Interface is an absolute useful addition as part of ‘Functional Interfaces’ and can serve variety of purposes. It is quite powerful as it can be used as a higher order functions through lambda functions and above examples could help you to get better idea on how to implement it.
LongSupplier Interface in Java 8 Examples...!!! Share on X
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