The bottom line is that double-checked locking, in whatever form, should not be used because you cannot guarantee that it will work on any JVM implementation.
无论以何种形式，都不应使用双重检查锁定，因为您不能保证它在任何JVM实现上都能顺利运行。
However, if you specify a border, it may contain a double strike of bold lines at the bottom of the box, along the x axis line (Cosmetically, this wouldn't look right.).
但是，如果指定边框，在框的底边沿着x轴可能有两条粗线（这看起来不太美观）。
The bottom line is, don't use double quotes to specify your -e one-line script argument.
结论是：不要使用双引号来指定以 -e 开始的一行程序脚本参数。
The bottom line is, don't use double quotes to specify your -e one-line script argument.
结论是：不要使用双引号来指定以 -e 开始的一行程序脚本参数。
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