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How to Use if/else Logic in Java 8 Streams 1. Overview In this tutorial, we’re going to demonstrate how to implement if/else logic with Java 8 Streams. As part of the tutorial, we’ll create a simple algorithm to identify odd and even numbers. We can take a look at this article… Continue Reading java-8-streams-if-else-logic
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String Operations with Java Streams 1. Overview Java 8 has introduced a new Stream API that lets us process data in a declarative manner. In this quick article, we would learn how to use the Stream API to split a comma-separated String into a list of Strings and how to… Continue Reading java-stream-operations-on-strings
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The Java 8 Stream API Tutorial 1. Overview In this in-depth tutorial, we’ll go through the practical usage of Java 8 Streams from creation to parallel execution. To understand this material, readers need to have a basic knowledge of Java 8 (lambda expressions, Optional, method references) and of the Stream… Continue Reading java-8-streams
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Counting Matches on a Stream Filter 1. Overview In this tutorial, we’ll explore the use of the Stream.count() method. Specifically, we’ll see how we can combine the count() method with the filter() method to count the matches of a Predicate we’ve applied. 2. Using Stream.count() The count() method itself provides a… Continue Reading java-stream-filter-count
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“Stream has already been operated upon or closed” Exception in Java 1. Overview In this brief article, we’re going to discuss a common Exception that we may encounter when working with the Stream class in Java 8: IllegalStateException: stream has already been operated upon or closed. We’ll discover the scenarios… Continue Reading java-stream-operated-upon-or-closed-exception
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Introduction to StreamEx 1. Overview One of the most exciting features of Java 8 is the Stream API – which, simply put, is a powerful tool for processing sequences of elements. StreamEx is a library that provides additional functionality for the standard Stream API along with the performance improvements. Here… Continue Reading streamex
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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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Guide to Stream.reduce() 1. Overview The Stream API provides a rich repertoire of intermediate, reduction, and terminal functions, which also support parallelization. More specifically, reduction stream operations allow us to produce one single result from a sequence of elements, by applying repeatedly a combining operation to the elements in the… Continue Reading java-stream-reduce
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