Book Image

Introduction to JVM Languages

Book Image

Introduction to JVM Languages

Overview of this book

Anyone who knows software development knows about the Java Virtual Machine. The Java Virtual Machine is responsible for interpreting Java byte code and translating it into actions. In the beginning, Java was the only programming language used for the JVM. But increasing complexity of the language and the remarkable performance of the JVM created an opening for a new generation of programming languages. If you want to build a strong foundation with the Java Virtual Machine and get started with popular modern programming languages, then this book is for you. The book will begin with a general introduction of the JVM and its features, which are common to the JVM languages, helping you get abreast with its concepts. It will then dive into explaining languages such as Java, Scala, Clojure, Kotlin, and Groovy and will show how to work with each language, their features, use cases, and pros and cons. By writing example projects in those languages and focusing on each language’s strong points, it will help you find the programming language that is most appropriate for your particular needs. By the end of the book, you will have written multiple programs that run on the Java Virtual Machine and know about the differences between the various languages.
Table of Contents (21 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Quiz


  1. Is Clojure a pure functional programming language?

a) Yes, it's a pure functional programming.

b) No, it's a functional programming language but not a pure one because it allows state changes.

c) No, but Clojure is a pure OOP language.

d) No, Clojure is not a functional programming language.

  1. Will this code run in the Clojure REPL?
        (10)

a) Yes, this is valid code. It will return 10.

b) No, the last entry in the list must be a function.

c) No, this will not run because the first element in the list is not a function.

d) None of the preceding options.

  1. What is the default type that Clojure uses for whole numbers if it can fit in the data type?

a) Primitive long value.

b) The java.lang.Long wrapper class instance.

c) Primitive integer value.

d) The java.lang.Integer wrapper class instance.

  1. What is the printed output of the following program?
        (println + 25 25)

a) It prints 50.

b) It prints a reference to the + function, followed by "25 25".

c) An exception is thrown.

d) None of the preceding options...