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

Java 8 | BooleanSupplier 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 boolean value. The lambda expression assigned to an object of BooleanSupplier type is used to define its

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

<Boolean>

The BooleanSupplier interface consists of the only one function:

This method does not take in any value but produces a boolean result.

boolean getAsBoolean()

This method returns a

. Below is the code to illustrate getAsBoolean() method:

// Java program to illustrate
// getAsBoolean() method of
// BooleanSupplier Interface

import java.util.function.BooleanSupplier;

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

        // Create a BooleanSupplier instance
        BooleanSupplier sup = () -> true;

        // Get the boolean value
        // Using getAsBoolean() method
        System.out.println(sup.getAsBoolean());
    }
}

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