Converting Iterator to List
1. Overview In this short tutorial, we’ll learn how to convert an Iterator to a List in Java. We’ll cover a few examples using a while loop, Java 8, […]
JAVA
Multi Dimensional ArrayList in Java
1. Overview Creating a multidimensional ArrayList often comes up during programming. In many cases, there is a need to create a two-dimensional ArrayList or a three-dimensional ArrayList. In this tutorial, we’ll discuss […]
Guide to CopyOnWriteArrayList
1. Overview In this quick article, we’ll be looking at the CopyOnWriteArrayList from the java.util.concurrent package. This is a very useful construct in the multi-threaded programs – when we […]
Immutable ArrayList in Java
1. Overview This quick tutorial will show how to make an ArrayList immutable with the core JDK, with Guava and finally with Apache Commons Collections 4. This article is […]
Guide to the Java ArrayList
1. Overview In this article, we’re going to take a look at ArrayList class from the Java Collections Framework. We’ll discuss its properties, common use cases, as […]
A Guide to the Java LinkedList
1. Introduction LinkedList is a doubly-linked list implementation of the List and Deque interfaces. It implements all optional list operations and permits all elements (including null). 2. Features Below you can […]
Java Concurrency Interview Questions and Answers
1. Introduction Concurrency in Java is one of the most complex and advanced topics brought up during technical interviews. This article provides answers to some […]
The Dining Philosophers Problem in Java
1. Introduction The Dining Philosophers problem is one of the classic problems used to describe synchronization issues in a multi-threaded environment and illustrate techniques for solving […]
How to Delay Code Execution in Java
1. Introduction It is relatively common for Java programs to add a delay or pause in their operation. This can be useful for task pacing […]
What is Thread-Safety and How to Achieve it?
1. Overview Java supports multithreading out of the box. This means that by running bytecode concurrently in separate worker threads, the JVM is capable of improving application […]
Java CyclicBarrier vs CountDownLatch
1. Introduction In this tutorial, we’ll compare CyclicBarrier and CountDownLatch and try to understand the similarities and differences between the two. 2. What Are These? When it comes to […]
Guide to ThreadLocalRandom in Java
1. Overview Generating random values is a very common task. This is why Java provides the java.util.Random class. However, this class doesn’t perform well in a multi-threaded […]
CyclicBarrier in Java
1. Introduction CyclicBarriers are synchronization constructs that were introduced with Java 5 as a part of the java.util.concurrent package. In this article, we’ll explore this implementation in a […]
Guide To CompletableFuture
1. Introduction This tutorial is a guide to the functionality and use cases of the CompletableFuture class that was introduced as a Java 8 Concurrency API improvement. […]
ExecutorService – Waiting for Threads to Finish
1. Overview The ExecutorService framework makes it easy to process tasks in multiple threads. We’re going to exemplify some scenarios in which we wait for threads to […]
Guide to java.util.concurrent.Locks
1. Overview Simply put, a lock is a more flexible and sophisticated thread synchronization mechanism than the standard synchronized block. The Lock interface has been around since Java 1.5. […]
Guide to CountDownLatch in Java
1. Introduction In this article, we’ll give a guide to the CountDownLatch class and demonstrate how it can be used in a few practical examples. Essentially, by […]
Custom Thread Pools In Java 8 Parallel Streams
1. Overview Java 8 introduced the concept of Streams as an efficient way of carrying out bulk operations on data. And parallel Streams can be obtained in environments […]
Guide to the Fork/Join Framework in Java
1. Overview The fork/join framework was presented in Java 7. It provides tools to help speed up parallel processing by attempting to use all available […]
A Guide to the Java ExecutorService
1. Overview ExecutorService is a JDK API that simplifies running tasks in asynchronous mode. Generally speaking, ExecutorService automatically provides a pool of threads and an API for assigning […]
