IDEA for Java

In this book, we use JDK 11, and the IntelliJ IDEA Community¹ is enough for our course.

Create an empty project without building system

For the simplicity, we don't need to rely on third party libraries in most cases when learning data structures, so you can choose IntelliJ for Build system:

Create an empty project with gradle

In order to integrate JUnit 5 with an ease in our project, gradle is preferred as the Build System in this book.

And you can customize the GroupID if you like. In build.gradle, we can find that the dependencies with respect to units test have been specified:

dependencies {
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'
}

¹ The Ultimate version (paid) offers more features than the Community one (free).