theboreddev

        CompletableFuture<String> completableFuture = new CompletableFuture<>();

        completableFuture
                .thenAccept(System.out::println);

        completableFuture.complete("I have completed!");

theboreddev

        final ExecutorService executor = Executors.newSingleThreadExecutor();
        CompletableFuture.runAsync(task, executor);

theboreddev

        Runnable task = () -> {
            System.out.println("Async task thread : " + Thread.currentThread().getName());
            System.out.println("EXECUTED!");
        };
        final CompletableFuture<Void> future = CompletableFuture.runAsync(task);

        System.out.println("Main thread : " + Thread.currentThread().getName());
        future.join();

theboreddev

        Runnable task = () -> System.out.println("EXECUTED!");
        CompletableFuture.runAsync(task);

theboreddev

public class MyClass {
    private MyAppState myAppState;

    synchronized public void pleaseBlockMe() {
        // omitted code
        updateState();
        // omitted code
    }

    private void updateState() {

theboreddev

import org.junit.Test;

import java.time.LocalTime;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.CompletableFuture;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.util.Lists.emptyList;

theboreddev

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.time.LocalTime;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;

theboreddev

package com.theboredev;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Collection;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.function.BinaryOperator;

theboreddev

    @Test
    public void convert_shouldReturnDCCCXXXVIII() {

        final String romanNumeral = RomanNumerals.convert(838);

        assertThat(romanNumeral, is("DCCCXXXVIII"));
    }

theboreddev

    @Test
    public void convert_shouldReturnVI() {

        final String romanNumeral = RomanNumerals.convert(6);

        assertThat(romanNumeral, is("VI"));
    }