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Showing content from https://www.geeksforgeeks.org/java/java-8-doublesupplier-interface-with-examples/ below:

Java 8 | DoubleSupplier Interface with Examples

Last Updated : 11 Jul, 2025

The

is a part of the

package which has been introduced since Java 8, to implement

in Java. It represents a function which does not take in any argument but produces a double value. The lambda expression assigned to an object of DoubleSupplier type is used to define its

which eventually applies the given operation on its argument. It is similar to using an object of type

<Double>

The DoubleSupplier interface consists of the only one function:

This method does not take in any value but produces a double-valued result.

double getAsDouble()

This method returns

Below is the code to illustrate getAsDouble() method:

// Java Program to illustrate
// getAsDouble method of
// DoubleSupplier Interface
import java.util.function.DoubleSupplier;

public class GFG {
    public static void main(String args[])
    {

        // Create a DoubleSupplier instance
        DoubleSupplier sup = () -> Math.random();

        // Get the double value
        // Using getAsDouble() method
        System.out.println(sup.getAsDouble());
    }
}

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