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Java 8 Predicate Chain 1. Overview In this quick tutorial, we’ll discuss different ways to chain Predicates in Java 8. 2. Basic Example First, let’s see how to use a simple Predicate to filter a List of names: @Test public void whenFilterList_thenSuccess(){ List<String> names = Arrays.asList(“Adam”, “Alexander”, “John”, “Tom”); List<String>… Continue Reading java-predicate-chain
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Iterable to Stream in Java 1. Overview In this short tutorial, let’s convert a Java Iterable object into a Stream and perform some standard operations on it. 2. Converting Iterable to Stream The Iterable interface is designed keeping generality in mind and does not provide any stream() method on its… Continue Reading java-iterable-to-stream
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Introduction to Java 8 Streams 1. Overview In this article, we’ll have a quick look at one of the major pieces of new functionality Java 8 had added – Streams. We’ll explain what streams are about and showcase the creation and basic stream operations with simple examples. 2. Stream API… Continue Reading java-8-streams-introduction
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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 want to read more about Stream API itself, check this article. 2. The Stream.collect() Method Stream.collect() is one of… Continue Reading java-8-collectors
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Java 8 Math New Methods 1. Introduction Usually, when we think about the new features that came with version 8 of Java, functional programming and lambda expressions are first things that come to mind. Nevertheless, besides those big features there’re others, maybe having a smaller impact but also interesting and… Continue Reading java-8-math
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Challenges in Java 8 1. Overview Java 8 introduced some new features, which revolved mostly around the use of lambda expressions. In this quick article, we’re going to take a look at downsides of some of them. And, while this is not a full list, it’s a subjective collection of… Continue Reading java-8-challenges
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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 that support concurrency. These streams can come with improved performance – at the cost… Continue Reading java-8-parallel-streams-custom-threadpool
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Guide to Java 8 groupingBy Collector 1. Introduction In this article, we’ll see how the groupingBy collector works using various examples. To understand the material covered in this article, a basic knowledge of Java 8 features is needed. You can have a look at the intro to Java 8 Streams… Continue Reading java-groupingby-collector
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DistinctBy in the Java Stream API 1. Overview Searching for different elements in a list is one of the common tasks that we as programmers usually face. From Java 8 on with the inclusion of Streams we have a new API to process data using functional approach. In this article,… Continue Reading java-streams-distinct-by
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Guide to the Java 8 forEach 1. Overview Introduced in Java 8, the forEach loop provides programmers with a new, concise and interesting way for iterating over a collection. In this article, we’ll see how to use forEach with collections, what kind of argument it takes and how this loop… Continue Reading foreach-java
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