而类是引用类型，对象变量可在不同的时间引用各种类实例。

But classes are reference types, and an object variable can refer to various class instances at different times.

youdao

而类是引用类型，对象变量可在不同的时间引用各种类实例。

But classes are reference types, and an object variable can refer to various class instances at different times.

youdao