You should also remember that static classes that preserve state between method calls should be made thread safe by default.

您还应该记得，在方法调用之间保留状态的静态类在默认情况下应该是线程安全的。

youdao

Since it is thread safe by design, you might cache it in a public static final variable, or wrap it in a singleton pattern after creation for later access.

因为根据设计它是线程安全的，创建它之后可以把它缓存在一个公共静态最终变量中，或者包装在单实例模式中以供以后访问。

youdao

Once the class has been resolved, the original code location is modified in a thread-safe way to access the static field's address directly because that address is then known.

类一旦被解析，就会以一种线程安全的方式修改原始代码位置以便直接访问静态字段的地址，因为此时已获知该地址。

youdao