java calls the method written in js

ScriptEngineManager manager = new ScriptEngineManager();
	     ScriptEngine engine = manager.getEngineByName("javascript");
	     engine.put("ps", this);
	     engine.eval(script);

The method name in ps.java in js, such as: ps.getName();


polymorphism

Format format = (Format)Class.forName(messageType).newInstance();

Note: messageType java class full path