Weak, soft, and phantom references can improve the memory characteristics of your application by allowing flexible caching.

弱引用、软引用和虚引用允许灵活的缓存，能够改进应用程序的内存特性。

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Weak and soft references both extend the abstract reference class (as do phantom references, which will be discussed in a future article).

弱引用和软引用都扩展了抽象的reference类(虚引用(phantom references)也一样，这将在以后的文章中介绍)。

youdao

Weak and soft references both extend the abstract reference class (as do phantom references, which will be discussed in a future article).

弱引用和软引用都扩展了抽象的reference类(虚引用(phantom references)也一样，这将在以后的文章中介绍)。

youdao