java 执行JavaScript 以及容器话的问题

public static void main(String[] args) {
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("nashorn");
        try {
            int value=2;
            SimpleBindings bind=new SimpleBindings();
            SimpleBindings bind2=new SimpleBindings();
            SimpleBindings bind3=new SimpleBindings();
            bind.put("点数", value);
            bind2.put("a", value);
            bind2.put("b", value);
            bind3.put("a1", value+1);
            bind3.put("b1", value+2);
             System.out.println(engine.eval("点数<50?50:Math.ceil(56/50)*50",bind));
            System.out.println(engine.eval("demosum=function(a,b){return a+b}; demosum(a,b);",bind2));    // 定义方法，并调用支持参数绑定
            System.out.println(engine.eval("(function(a1,b1){function demosub(a,b){ return a+b;}return demosub(a1,b1)})(a1,b1)",bind3));    // 使用js 立即执行函数
          } catch (ScriptException e) {
            e.printStackTrace();
        }
    }