import java.io.FileReader;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
public class RunScriptFile {
public static void main(String[] args) {
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("js");
try {
FileReader reader = new FileReader("testFile.js");
engine.eval(reader);
reader.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}

function add(a, b) {
c = a + b;
return c;
}
result = add (10, 5);
print ('Result = ' + result);