JUnit 5 for Kotlin Developers
1. Introduction The newly released JUnit 5 is the next version of the well-known testing framework for Java. This version includes a number of features that specifically target […]
JAVA
Mockito and JUnit 5 – Using ExtendWith
1. Introduction In this quick article, we’ll show how to integrate Mockito with the JUnit 5 extension model. To learn more about the JUnit 5 extension […]
The SpringJUnitConfig and SpringJUnitWebConfig Annotations in Spring 5
1. Introduction In this quick article, we’ll take a look at the new @SpringJUnitConfig and @SpringJUnitWebConfig annotations available in Spring 5. These annotations are a composition of JUnit 5 […]
Assertions in JUnit 4 and JUnit 5
1. Introduction In this article, we’re going to explore in details the assertions available within JUnit. Following the migrating from JUnit 4 to JUnit 5 and A Guide […]
Assert an Exception is Thrown in JUnit 4 and 5
1. Introduction In this quick tutorial, we’ll be looking at how to test if an exception was thrown using the JUnit library. We will, of […]
@Before vs @BeforeClass vs @BeforeEach vs @BeforeAll
1. Overview In this short tutorial, we’re going to explain the differences between the @Before, @BeforeClass, @BeforeEach and @BeforeAll annotations in JUnit 4 and 5 — with practical examples of how […]
JUnit 5 @Test Annotation
1. Overview In this article, we’ll make a quick review of JUnit’s @Test annotation. This annotation provides a powerful tool for performing unit and regression testing. 2. […]
A Guide to JUnit 5
1. Overview JUnit is one of the most popular unit-testing frameworks in the Java ecosystem. The JUnit 5 version contains a number of exciting innovations, with the […]
Most commonly used String methods in Java
1. Java String.String() String objects can be created by either using literals: or by calling one of the constructors: If we use the String literal, it’ll try to reuse […]
Introduction to Apache Commons Text
1. Overview Simply put, the Apache Commons Text library contains a number of useful utility methods for working with Strings, beyond what the core Java offers. […]
Guava CharMatcher
1. Remove Special Characters from a String Let’s start by removing all special characters from a String. In the following example, we remove all characters that aren’t […]
String Processing with Apache Commons Lang 3
1. Overview The Apache Commons Lang 3 library provides support for manipulation of core classes of the Java APIs. This support includes methods for handling strings, numbers, […]
Java InputStream to String
1. Overview In this tutorial, we’ll look at how to convert an InputStream to a String. We’ll start by using plain Java, including Java8/9 solutions, then look into […]
Convert char to String in Java
1. Introduction Converting char to String instances is a very common operation. In this article, we will show multiple ways of tackling this situation. 2. String.valueOf() The String class has a […]
Convert String to int or Integer in Java
1. Introduction Converting a String to an int or Integer is a very common operation in Java. In this article, we will show multiple ways of dealing with this issue. There […]
Encode a String to UTF-8 in Java
1. Overview When dealing with Strings in Java, sometimes we need to encode them into a specific charset. This tutorial is a practical guide showing different […]
Array to String Conversions
1. Overview In this short tutorial, we’re going to look at converting an array of strings or integers to a string and back again. We […]
Convert String to Byte Array and Reverse in Java
1. Introduction We frequently need to convert between String and byte array in Java. In this tutorial, we’ll examine these operations in detail. First, we’ll look at various ways […]
Converting Between Byte Arrays and Hexadecimal Strings in Java
1. Overview In this tutorial, we’ll take a look at different ways to convert a byte array to a hexadecimal String, and vice versa. We’ll also understand […]
Format ZonedDateTime to String
1. Overview In this quick tutorial, we’ll see how to convert a ZonedDateTime to a String. We’ll also look at how to parse a ZonedDateTime from a String. 2. Creating a ZonedDateTime […]
