Java等同于C＃扩展方法 - Java equivalent to C# extension methods

问题：

I am looking to implement a functionality in a list of object as I would in C# using an extension method.我希望在对象列表中实现功能，就像在C＃中使用扩展方法一样。

Something like this:像这样的东西：

List<DataObject> list;
// ... List initialization.
list.getData(id);

How do I do that in Java?我该如何在Java中做到这一点？

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解决方案：

参考一： https://en.stackoom.com/question/IIEF
参考二： https://stackoom.com/question/IIEF