This book takes an in-depth look at lambdas and their supporting features; things like functional interfaces and type inference.
After reading the book, you'll:
Have an overview of new features in modern Java
Understand lambdas in-depth, their background, syntax, implementation details and how and when to use them
Understand the difference between functions to classes and why that's relevant to lambdas
Understand the difference between lambdas and closures
Appreciate the improvements to type inference that drive a lot of the new features
Be able to use method references and understand scoping and "effectively final"
Understand the differences in bytecode produced when using lambdas
Be able to reason about exceptions and exception handling best practice when using lambdas
Whether you're migrating legacy Java programs to a more modern Java style or building applications from scratch, this book will help you start to leverage the power of functional programming on the Java platform.
In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.
Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "This LISP expression evaluates to a function, that when applied will take a single argument, bind it to arg and then add 1 to it."
A block of code is set as follows:
void anonymousClass() {
final Server server = new HttpServer();
waitFor(new Condition() {
@Override
public Boolean isSatisfied() {
return !server.isRunning();
}
});
}When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
void anonymousClass() {
final Server server = new HttpServer();
waitFor(new Condition() {
@Override
public Boolean isSatisfied() {
return !server.isRunning();
}
});
}New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "In order to download new modules, we will go to Files | Settings | Project Name | Project Interpreter."
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