Use an external file containing the javascript code

    

import java.io.InputStreamReader;
import java.util.List;

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

public class Main {
  public static void main(String[] args) throws Exception{
    ScriptEngineManager mgr = new ScriptEngineManager();
    ScriptEngine engine = mgr.getEngineByName("javascript");
    engine.eval(new InputStreamReader
        (Main.class.getResourceAsStream("s.js")));
    
    List <String> list1 = (List <String>)engine.get("list1");
    if (list1 != null) {
      for (String s : (List<String>) list1) {
        System.out.println(s);
      }
    }
    if (engine instanceof Invocable){
      Invocable engineInv = (Invocable)engine;
      Object obj = engine.get("listObject");
      Object list2 = engineInv.invokeMethod(obj, "getList2");
      if (list2 != null) {
        for (String s : (List<String>) list2) {
          System.out.println(s);
        }
      }
    }
  }
}

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Use an external file containing the javascript code : Script Engines « JDK 6 « Java

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