Book Image

The Java Workshop

By : David Cuartielles, Andreas Göransson, Eric Foster-Johnson
4 (2)
Book Image

The Java Workshop

4 (2)
By: David Cuartielles, Andreas Göransson, Eric Foster-Johnson

Overview of this book

Java is a versatile, popular programming language used across a wide range of industries. Learning how to write effective Java code can take your career to the next level, and The Java Workshop will help you do just that. This book is designed to take the pain out of Java coding and teach you everything you need to know to be productive in building real-world software. The Workshop starts by showing you how to use classes, methods, and the built-in Collections API to manipulate data structures effortlessly. You’ll dive right into learning about object-oriented programming by creating classes and interfaces and making use of inheritance and polymorphism. After learning how to handle exceptions, you’ll study the modules, packages, and libraries that help you organize your code. As you progress, you’ll discover how to connect to external databases and web servers, work with regular expressions, and write unit tests to validate your code. You’ll also be introduced to functional programming and see how to implement it using lambda functions. By the end of this Workshop, you’ll be well-versed with key Java concepts and have the knowledge and confidence to tackle your own ambitious projects with Java.
Table of Contents (20 chapters)

Looping and Performing Repetitive Tasks

In this chapter, we cover using loops to perform repetitive tasks. The main types of loop are as follows:

  • for loops
  • while loops
  • do-while loops

for loops repeat a block a set number of times. Use a for loop when you are sure how many iterations you want. A newer form of the for loop iterates over each item in a collection.

while loops execute a block while a given condition is true. When the condition becomes false, the while loop stops. Similarly, do-while loops execute a block and then check a condition. If true, the do-while loop runs the next iteration.

Use while loops if you are unsure how many iterations are required. For example, when searching through data to find a particular element, you normally want to stop when you find it.

Use a do-while loop if you always want to execute the block and only then check if another iteration is needed.

Looping with the for Loop

A for loop executes the same block...