Java by API/javax.script/Invocable

Invocable: getInterface(Class clasz)

   <source lang="java">
    

import javax.script.Invocable; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; public class Main {

 public static void main(String[] args) throws Exception {
   ScriptEngineManager manager = new ScriptEngineManager();
   ScriptEngine engine = manager.getEngineByName("js");
   engine.eval("function add (a, b) {c = a + b; return c; }");
   Invocable jsInvoke = (Invocable) engine;
   Object result1 = jsInvoke.invokeFunction("add", new Object[] { 10, 5 });
   System.out.println(result1);
   Adder adder = jsInvoke.getInterface(Adder.class);
   int result2 = adder.add(10, 5);
   System.out.println(result2);
 }

} interface Adder {

 int add(int a, int b);

}

 </source>
   
  
 
  

Invocable: invokeFunction(String name, Object... args)

   <source lang="java">
    

import javax.script.Invocable; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; public class Main {

 public static void main(String[] args) throws Exception {
   ScriptEngineManager manager = new ScriptEngineManager();
   ScriptEngine engine = manager.getEngineByName("js");
   engine.eval("function add (a, b) {c = a + b; return c; }");
   Invocable jsInvoke = (Invocable) engine;
   Object result1 = jsInvoke.invokeFunction("add", new Object[] { 10, 5 });
   System.out.println(result1);
   Adder adder = jsInvoke.getInterface(Adder.class);
   int result2 = adder.add(10, 5);
   System.out.println(result2);
 }

} interface Adder {

 int add(int a, int b);

}

 </source>