To take advantage of these reference classes, you must break the strong reference to the MyObject object by setting obj to null.

要利用这些引用类，您必须取消对MyObject对象的强引用，方法是将ob j设置为null。

youdao

Before the reference classes were introduced, only strong references were available. For example, the following line of code shows a strong reference, obj.

在引入引用类之前，我们只能使用强引用(strong reference)。

youdao

Before the reference classes were introduced, only strong references were available. For example, the following line of code shows a strong reference, obj.

在引入引用类之前，我们只能使用强引用(strong reference)。

youdao