When these constructs are used in your code, the IDE recognizes them, correctly highlights errors, and lets you automatically fix syntax. To complete this tutorial, you need the software and resources listed in the following table. Click Finish to close the Add Java Platform dialog box. Right-click the AnagramGame project in the Projects window and select Properties from the context menu. Java SE 8 introduces subset profiles of the Java SE platform specification that can be used to deploy and run applications that do not require the entire platform.
Three profiles that have been defined so far are named compact1 , compact2 , and compact3. Each profile specifies a particular set of Java API packages and contains all of the APIs in profiles smaller than itself: compact1 is a subset of compact2 , which is a subset of compact3 , which in its turn is a subset of the full JRE.
The table below lists packages that are comprised in each profile. To see how the IDE checks whether classes used in your project belong to the specified profile, select Compact1 as a profile for the AnagramGame project and click OK. The IDE displays errors to notify that the AnagramGame project is not compliant with the compact1 profile. Lambda expressions address the bulkiness of anonymous inner classes by expressing the machinery of anonymous inner classes more compactly.
The general syntax of a lambda expression consists of a set of parameters, an arrow token, and a function body either a single expression or a statement block :. NetBeans IDE detects pre-lambda expressions and displays the hints in the Editor proposing to turn such constructs into lambda expressions. For example, the AnagramGame project features a pre-lambda construct in the Anagrams. If the Use Lambda hint is selected, the IDE converts the anonymous inner class into a lambda expression. If you choose the Run Inspect on option, the IDE displays the Inspect dialog box that allows to run a single Convert to Lambda inspection on the specified file.
After you press the Inspect button to launch the inspection, the IDE identifies all the pre-lambda constructs in the file and displays them in the Inspector window. Java SE 8 features include repeating annotations that enable you to apply annotations with the same type to a single program element, as shown in the following code example:.
NetBeans IDE support for repeating annotations allows you to write code with the same annotations provided the repeatable and containing annotation types are declared:. The Java Tutorials: Lambda Expressions. I really like the generation of the entity facades in Java EE, but also the code generation of constructors, getters, setters, and so on.
Very handy is also the generation of JavaServer Faces forms or data tables including Primefaces. So you can easily scaffold your GUI and afterwards adapt the controls to your needs. The wizards are also very helpful for live coding in the classroom.
You can start at zero and, with the assistance of NetBeans, you can very quickly get to the point where you want to show something to your students. No installation process necessary. It is very convenient to use NetBeans in labs where lots of courses take place. Sometimes you need the latest version in a particular course.
No installation process is needed at all for your programming environment and no root privileges are needed. In conclusion, NetBeans is well suited to show small code snippets as well as to create huge software projects. For teaching purposes, the completeness of the software and the flexibility when installing and using it is very helpful. Write to netbeans dot webmaster at gmail dot com and we'll work with you to promote your work in the classroom. Thanks for visiting DZone today,.
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