Book Image

Java Fundamentals

By : Gazihan Alankus, Rogério Theodoro de Brito, Basheer Ahamed Fazal, Vinicius Isola, Miles Obare
Book Image

Java Fundamentals

By: Gazihan Alankus, Rogério Theodoro de Brito, Basheer Ahamed Fazal, Vinicius Isola, Miles Obare

Overview of this book

Since its inception, Java has stormed the programming world. Its features and functionalities provide developers with the tools needed to write robust cross-platform applications. Java Fundamentals introduces you to these tools and functionalities that will enable you to create Java programs. The book begins with an introduction to the language, its philosophy, and evolution over time, until the latest release. You'll learn how the javac/java tools work and what Java packages are - the way a Java program is usually organized. Once you are comfortable with this, you'll be introduced to advanced concepts of the language, such as control flow keywords. You'll explore object-oriented programming and the part it plays in making Java what it is. In the concluding chapters, you'll get to grips with classes, typecasting, and interfaces, and understand the use of data structures, arrays, strings, handling exceptions, and creating generics. By the end of this book, you will have learned to write programs, automate tasks, and follow advanced courses on algorithms and data structures or explore more advanced Java courses.
Table of Contents (12 chapters)
Java Fundamentals


This is the most generic interface that is the base for all collections except Map. The documentation describes it as representing a collection of objects called elements. It declares the basic interface for all collections with the following most important methods:

  • add(Element): Adds an element to the collection

  • clear(): Removes all elements from the collection

  • contains(Object): Checks whether an object is in the collection

  • remove(Object): Removes the specified element from the collection, if present

  • size(): Returns the number of elements stored in the collection


The list interface represents a sequential collection of elements that can grow indefinitely. Elements in a list can be accessed by their index, which is the position that they were put in, but can change if elements are added between other elements.

When iterating over a list, the order that the elements will be fetched in is deterministic and will always be based on the order of their indexes, just like an array.

As we...