create an Invocable object by casting the script engine object expose object defined in the script to the Java application Public static void main(String args) throws Exception ") Finally, a new thread is started that runs the script function. The methods of the interface are implemented by script functions with matching names (in this case, the run() function is used to implement the run() method in the interface object). Then, an Invocable object is created, and its getInterface() method is used to create a Runnable interface object.
#Statcalc script java code#
In this example, the eval() method is called with JavaScript code that defines a function. Implementing a Java Interface with Script Functions The abstract class provides useful defaults for a few methods in the ScriptEngine interface. This document does not cover the implementation of script engines compliant with JSR 223, but at the most basic level, you must implement the and interfaces. The Nashorn engine was developed fully in Java by Oracle as part of an OpenJDK project, Project Nashorn.Īlthough Nashorn is the default ECMAScript engine used by the Java Scripting API, you can use any script engine compliant with JSR 223, or you can implement your own. The Nashorn engine is the default ECMAScript (JavaScript) engine bundled with the Java SE Development Kit (JDK). A ScriptEngineManager object can discover script engines through the JAR file service discovery mechanism, and instantiate ScriptEngine objects that interpret scripts written in a specific scripting language. It is a relatively small and simple package with the ScriptEngineManager class as the starting point. The Java Scripting API consists of classes and interfaces from the javax.script package.
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