java JComboBox是一种原始类型。对泛型类型JComboBox<E>的引用应该参数化

Question

String[] boxOptions = {"1","2","4","8","16","20","40","100","400"};
JComboBox box = new JComboBox(boxOptions);

我之前的程序中有这些精确的代码行，没有出现这个错误。我做了一些搜索，结果让我有些不知所措。有什么想法吗

错误是：

JComboBox is a raw type. References to generic type JComboBox<E> should be parameterized