Copy a List to Another List in Java
1. Overview In this quick tutorial, we’ll show different ways to copy a List to another List and a common error produced in the process. For an introduction to […]
Java
Java List UnsupportedOperationException
1. Overview In this quick tutorial, we’ll discuss a common Exception that can occur when working with some the API of most List implementations – the UnsupportedOperationException. A java.util.List has more functionality than […]
How to Find an Element in a List with Java
1. Overview Finding an element in a list is a very common task we come across as developers. In this quick tutorial, we’ll cover different […]
Check If Two Lists are Equal in Java
1. Introduction In this short article we’ll focus on the common problem of testing if two List instances contain the same elements in exactly the same order. […]
Removing all Nulls from a List in Java
This quick tutorial is going to show how to remove all null elements from a List, using plain Java, Guava, the Apache Commons Collections and the newer Java 8 lambda […]
Removing all duplicates from a List in Java
In this quick tutorial we’re going to show how to clean up the duplicate elements from a List – first using plain Java, then Guava, and finally […]
Removing all Nulls from a List in Java
1. Remove Nulls From a List Using Plain Java The Java Collections Framework offers a simple solution for removing all null elements in the List – a basic while loop: Alternatively, we […]
Partition a List in Java
1. Overview In this tutorial I will illustrate how to split a List into several sublists of a given size. For a relatively simple operation, there is […]
Java – Get Random Item/Element From a List
1. Introduction Picking a random List element is a very basic operation but not so obvious to implement. In this article, we’ll show the most efficient way […]
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 […]
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 […]
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 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 […]
