Guide to Java 8 groupingBy Collector
1. Introduction In this tutorial, we’ll see how the groupingBy collector works using various examples. For us to understand the material covered in this tutorial, we’ll need a […]
Guide
Guide to Java 8’s Collectors
1. Overview In this tutorial, we will be going through Java 8’s Collectors, which are used at the final step of processing a Stream. If you […]
Guide to Guava Table
1. Overview In this tutorial, we’ll show how to use the Google Guava’s Table interface and its multiple implementations. Guava’s Table is a collection that represents a table like […]
Guide to Guava Multimap
1. Overview In this article, we will look at one of Map implementations from Google Guava library – Multimap. It is a collection that maps keys to values, […]
Guide to Apache Commons CircularFifoQueue
1. Overview In this quick tutorial, we’ll have a look at the CircularFifoQueue data structure provided in the collections4.queue package of the Apache Commons Collections library. CircularFifoQueue<E> implements the Queue<E> interface and […]
A Guide to Apache Commons Collections CollectionUtils
1. Overview Simply put, the Apache CollectionUtils provides utility methods for common operations which cover a wide range of use cases and helps in avoiding writing boilerplate code. […]
A Guide to Iterator in Java
1. Introduction An Iterator is one of many ways we can traverse a collection, and as every option, it has its pros and cons. It was first […]
A Guide to Concurrent Queues in Java
1. Overview In this tutorial, we’ll walk through some of the main implementations of concurrent queues in Java. For a general introduction to queues, refer […]
Guide to the Java Queue Interface
1. Introduction In this tutorial, we’ll be discussing Java’s Queue interface. First, we’ll take a peek at what a Queue does, and some of its core methods. Next, we’ll dive into a […]
Guide to DelayQueue
1. Overview In this article, we’ll be looking at the DelayQueue construct from the java.util.concurrent package. This is a blocking queue that could be used in producer-consumer programs. It […]
Guide to the Java TransferQueue
1. Overview In this article, we’ll be looking at the TransferQueue construct from the standard java.util.concurrent package. Simply put, this queue allows us to create programs according to the […]
A Guide to Java SynchronousQueue
1. Overview In this article, we’ll be looking at the SynchronousQueue from the java.util.concurrent package. Simply put, this implementation allows us to exchange information between threads in a thread-safe […]
Guide to java.util.concurrent.BlockingQueue
1. Overview In this article, we will look at one of the most useful constructs java.util.concurrent to solve the concurrent producer-consumer problem. We’ll look at an API […]
Guide to PriorityBlockingQueue in Java
1. Introduction In this article, we’ll focus on the PriorityBlockingQueue class and go over some practical examples. Starting with the assumption that we already know what a Queue is, […]
A Guide to Java HashMap
1. Overview In this article, we’ll see how to use HashMap in Java, and we’ll look at how it works internally. A class very similar to HashMap is Hashtable. Please […]
A Guide to EnumMap
1. Overview EnumMap is a Map implementation that exclusively takes Enum as its keys. In this tutorial, we’ll discuss its properties, common use cases and when we should use it. […]
A Guide to LinkedHashMap in Java
1. Overview In this article, we are going to explore the internal implementation of LinkedHashMap class. LinkedHashMap is a common implementation of Map interface. This particular implementation is a subclass of HashMap and […]
Guide to the ConcurrentSkipListMap
1. Overview In this quick article, we’ll be looking at the ConcurrentSkipListMap class from the java.util.concurrent package. This construct allows us to create thread-safe logic in a lock-free way. […]
A Guide to ConcurrentMap
1. Overview Maps are naturally one of the most widely style of Java collection. And, importantly, HashMap is not a thread-safe implementation, while Hashtable does provide thread-safety by synchronizing operations. […]
Guide to WeakHashMap in Java
1. Overview In this article, we will be looking at a WeakHashMap from the java.util package. In order to understand the data structure, we’ll use it here to roll […]
