EvalFile.java

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import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

@SuppressWarnings("javadoc")
public class EvalFile {
    public static void main(final String[] args) throws Exception {
        // create a script engine manager
        final ScriptEngineManager factory = new ScriptEngineManager();
        // create JavaScript engine
        final ScriptEngine engine = factory.getEngineByName("nashorn");
        // evaluate JavaScript code from given file - specified by first argument
        engine.eval(new java.io.FileReader(args[0]));
    }
}