The global JavaScript scope is not affected, making JavaImporter a much better alternative to importClass and importPackage. JavaImporter takes a variable number of arguments as Java packages, and the returned object can be used in a with statement whose scope includes the specified package imports. Var CollectionsAndFiles = new JavaImporter( This is very simple to do thanks to the new OpenJDK build infrastructure (for example, sh configure & make images on a Mac OS X operating system with the XCode command-line tools installed). You can also use a custom build of OpenJDK 8. The examples can be run using a recent JDK 8 early-access release. It shows the Java-to-JavaScript interoperability and how Java types can be implemented and extended from JavaScript, providing a seamless integration between the two languages. It covers using the standalone engine through the jjs command-line tool as well as using Oracle Nashorn as an embedded scripting engine inside Java applications. This article is an introduction to using Oracle Nashorn in several ways. It provides better compliance with the ECMA normalized JavaScript specification and better runtime performance through invokedynamic-bound call sites. Java SE 8 will instead ship with a new engine called Oracle Nashorn, which is based on JSR 292 and invokedynamic. Until Java SE 7, JDKs shipped with a JavaScript scripting engine based on Mozilla Rhino.
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