The -H option dereferences links on the command line and the -L option dereferences those plus links that are part of the display.

H 选项取消引用命令行上的链接，而 -L 选项取消引用属于显示内容一部分的附加链接。

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Without the theFlooble reference being volatile, the code in doWork() would be at risk for seeing a partially constructed Flooble as it dereferences the theFlooble reference.

如果 theFlooble 引用不是 volatile 类型，doWork() 中的代码在解除对 theFlooble 的引用时，将会得到一个不完全构造的 Flooble。

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