code for Using thread to run JavaScript by Java

import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class InterfaceTest {
public static void main(String args[]) throws Exception{
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("javascript");
engine.eval("function run() {print('www.java2s.com');}");
Invocable invokeEngine = (Invocable) engine;
Runnable runner = invokeEngine.getInterface(Runnable.class);
Thread t = new Thread(runner);
t.start();
t.join();
}
}