The most common mistake with bounded wildcards is forgetting to use them at all, restricting the utility of a class or forcing users to jump through hoops to reuse an existing class.

最常见的有界通配符错误就是忘记使用它们，这就限制了类的使用，或是强制用户不得不重用现有的类。

youdao

The most common mistake with bounded wildcards is forgetting to use them at all, restricting the utility of a class or forcing users to jump through hoops to reuse an existing class.

最常见的有界通配符错误就是忘记使用它们，这就限制了类的使用，或是强制用户不得不重用现有的类。

youdao