Lazy evaluation

MessingAround.java

package com.example;

import java.io.IOException;
import java.time.Duration;
import java.time.Instant;
import java.util.function.Supplier;


public class MessingAround {

    public static void main(String[] args) throws IOException, InterruptedException {


        logDuration(()->eagerEvaluator(() -> evaluate(1), () -> evaluate(2)));


    }

    public static void logDuration(Runnable runnable){
        Instant start = Instant.now();
        runnable.run();
        Instant end = Instant.now();
        Duration duration = Duration.between(start, end);
        System.out.println(String.format("Running for %d sec",duration.getSeconds()));

    }
    public static void eagerEvaluator(
            final Supplier<Boolean> input1, final Supplier<Boolean> input2) {
        System.out.println("eagerEvaluator called...");
        System.out.println("accept?: " + (input1.get() && input2.get()));
    }


    public static boolean evaluate(final int value) {
        System.out.println("evaluating ..." + value);
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
        }
        return value > 100;
    }


}