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By Josh Juneau
Java eight Recipes deals suggestions to universal programming difficulties encountered whereas constructing Java-based functions. totally up-to-date with the most recent gains and methods on hand, Java eight Recipes offers code examples regarding Lambdas, embedded scripting with Nashorn, the recent date-time API, move aid, sensible interfaces, and masses extra. Especial emphasis is given to positive aspects resembling lambdas which are newly brought in Java eight. content material is gifted within the renowned problem-solution structure: search for the programming challenge that you really want to resolve. learn the answer. observe the answer at once on your personal code. challenge solved!
The problem-solution process 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 beneficial. The publication respects some time by means of regularly targeting a role that you just will need to practice utilizing the language. suggestions come first. factors come later. you're unfastened to crib from the ebook and practice the code examples on to your personal projects.
* Covers the newly-released Java eight, together with a new bankruptcy on lambdas
* Focuses in particular on up-and-coming applied sciences akin to venture Nashorn and Java FX 2.0
* Respects some time through targeting useful ideas you could enforce on your personal code
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desk of Contents * the large photograph
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* Rewriting Your First undertaking
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* Introducing the Honeycomb UI
* utilizing the motion Bar
* Fragments
* dealing with Platform adjustments
* getting access to records
* utilizing personal tastes
* handling and having access to neighborhood Databases
* Leveraging Java Libraries
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Extra resources for Java 8 Recipes (2nd Edition)
Example text
When you import classes or types from those libraries and APIs, you are really importing packages. 1-10. Configuring the CLASSPATH Problem You want to execute a Java program, or include an external Java library in the application you are executing. Solution Set the CLASSPATH variable equal to the directory location of the user-defined Java classes or Java Archive (JAR) files that you need to have access to for executing your application. Let’s say that you have a directory named JAVA_DEV located at the root of your OS drive, and all the files your applications needs to access are located in this directory.
Solution Utilize a lambda expression to incorporate the action functionality using compact, inline syntax. The following JavaFX application contains a button that utilizes a lambda expression to encapsulate the functionality of the button, rather than an anonymous inner class. show(); } } This JavaFX application produces a simple application that looks like Figure 2-1. When you press the button, the ActionListener, which is a lambda expression, is invoked. Figure 2-1. Lambda expression as a button action listener 30 CHAPTER 2 N NEW FEATURES OF JAVA 8 How It Works Lambda expressions are one of the new features of Java 8 that will have a tremendous impact on productivity and business logic.
By default, different classes that reside within the same package have access to each other. class name must be used within the code. JuneauWidgets; However, it is often likely that all classes and type files that reside within a package need to be used. *; Although it is possible to import all files, it is not recommended unless absolutely necessary. As a matter of fact, it is considered a poor programming practice to include many import statements that use the wildcard. Instead, classes and type files should be imported individually.