By Josh Juneau

Java eight Recipes bargains suggestions to universal programming difficulties encountered whereas constructing Java-based functions. absolutely up-to-date with the latest gains and methods to be had, Java eight Recipes presents code examples related to Lambdas, embedded scripting with Nashorn, the recent date-time API, circulate help, sensible interfaces, and lots more and plenty extra. Especial emphasis is given to positive factors resembling lambdas which are newly brought in Java eight. content material is gifted within the well known problem-solution structure: lookup the programming challenge that you really want to unravel. learn the answer. practice the answer without delay on your personal code. challenge solved!

The problem-solution technique units Java eight Recipes aside. Java eight Recipes is targeted much less at the language itself and extra on what you are able to do with it that's priceless. The e-book respects some time through consistently concentrating on a role that you simply will need to practice utilizing the language. options come first. factors come later. you're unfastened to crib from the publication and practice the code examples on to your personal projects.

* Covers the newly-released Java eight, together with a new bankruptcy on lambdas
* Focuses particularly on up-and-coming applied sciences similar to undertaking Nashorn and Java FX 2.0
* Respects some time by way of concentrating on useful strategies you could enforce on your personal code

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Extra resources for Java 8 Recipes (2nd Edition)

Example text

This could be the case if your dependencies are located in more than one location. To do so, simply use the delimiter for your operating system (; or :) as a separator between the locations specified by the CLASSPATH variable. jar When loading the resources for a Java application, the JVM loads all the classes and packages that are specified in the first location, followed by the second, and so on. This is important because the order of loading may make a difference in some instances. N Note JAR files are used to package applications and Java libraries into a distributable format.

SEVERE, null, ex); } } public static void main(String[] main) { loadInlineJs(); } } How It Works Nashorn is a new JavaScript engine that has been included in Java 8. To execute JavaScript within a Java application, you invoke an instance of the Nashorn engine, passing it to the engine inline or external JavaScript. In this recipe, the Nashorn engine is obtained by calling on the ScriptEngineManager and passing "nashorn" as the argument. After obtaining the Nashorn engine, you are ready to invoke a JavaScript file or evaluate inline JavaScript code by calling on the engine’s eval() method.

44 CHAPTER 2 N NEW FEATURES OF JAVA 8 2-11. Printing from JavaFX Problem You want to provide the ability to print from within your JavaFX application. Solution Utilize the JavaFX Print API, new to JavaFX 8, to print designated nodes and to construct sophisticated print dialogs. The following class uses the new Print API to print the TextArea component when a print button is selected. endJob(); } } } public static void main(String[] args){ launch(args); } } 45 CHAPTER 2 N NEW FEATURES OF JAVA 8 The constructed application looks like Figure 2-5.

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