Shulou(Shulou.com)05/31 Report--

This article is a detailed introduction to "how to use java wildcards" for everyone. The content is detailed, the steps are clear, and the details are properly handled. I hope this article "how to use java wildcards" can help you solve your doubts. Let's go deeper and learn new knowledge together with the ideas of Xiaobian.

Wildcards, representing unknown types, represent types that do not care or cannot be determined for actual operation, and are generally used in conjunction with container classes.

public void testV(List list) {}

2、

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.