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AssertJ’s Java 8 Features 1. Overview This article focuses on AssertJ‘s Java8-related features and is the third article from the series. If you’re looking for general information on its main features have a look at the first article in the series Introduction to AssertJ and then at AssertJ for Guava.… Continue Reading assertJ-java-8-features
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Merging Two Maps with Java 8 1. Introduction In this quick tutorial, we’ll demonstrate how to merge two maps using the Java 8 capabilities. To be more specific, we’ll examine different merging scenarios including maps having duplicate entries. 2. Initialization As a start, let’s define two Map instances: private static… Continue Reading java-merge-maps
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Cucumber Java 8 Support 1. Overview In this quick tutorial, we’ll learn how to use Java 8 lambda expressions with Cucumber. 2. Maven Configuration First, we will need to add the following dependency to our pom.xml: <dependency> <groupId>info.cukes</groupId> <artifactId>cucumber-java8</artifactId> <version>1.2.5</version> <scope>test</scope> </dependency> The cucumber-java8 dependency can be found on Maven… Continue Reading cucumber-java-8-support
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New Features in Java 8 1. Overview In this article, we’ll have a quick look at some of the most interesting new features in Java 8. We’ll talk about: interface default and static methods, method reference and Optional. We have already covered some the features of the Java 8’s release… Continue Reading java-8-new-features
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Strategy Design Pattern in Java 8 1. Introduction In this article, we’ll look at how we can implement the strategy design pattern in Java 8. First, we’ll give an overview of the pattern, and explain how it’s been traditionally implemented in older versions of Java. Next, we’ll try out the… Continue Reading java-strategy-pattern
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Mockito’s Java 8 Features 1. Overview Java 8 introduced a range of new, awesome features, like lambda and streams. And naturally, Mockito leveraged these recent innovations in its 2nd major version. In this article, we are going to explore everything this powerful combination has to offer. 2. Mocking Interface With… Continue Reading mockito-2-java-8
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Java 8 – Powerful Comparison with Lambdas 1. Overview In this tutorial, we’re going to take a first look at the Lambda support in Java 8 – specifically at how to leverage it to write the Comparator and sort a Collection. This article is part of the “Java – Back… Continue Reading java-8-sort-lambda
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Convert between String and Timestamp 1. Overview Timestamp is one of a few legacy date-time objects in Java. In this tutorial, we’ll see how to parse from a String value to a Timestamp object and how to format a Timestamp object to a String. And since Timestamp relies on a Java-proprietary format,… Continue Reading java-string-to-timestamp
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Lambda Expressions and Functional Interfaces: Tips and Best Practices 1. Overview Now that Java 8 has reached wide usage, patterns, and best practices have begun to emerge for some of its headlining features. In this tutorial, we will take a closer look to functional interfaces and lambda expressions. Further reading:… Continue Reading java-8-lambda-expressions-tips
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Why Do Local Variables Used in Lambdas Have to Be Final or Effectively Final? 1. Introduction Java 8 gives us lambdas, and by association, the notion of effectively final variables. Ever wondered why local variables captured in lambdas have to be final or effectively final? Well, the JLS gives us… Continue Reading java-lambda-effectively-final-local-variables
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