我认为在此特定示例中，他们使用符号位来做到这一点. Java缺少无符号类型，因此对于使用最高有效位的数字，无法用a /= 2模拟a >>> 1.请注意，在整个示例中，代码仅使用>>>.我可以肯定地说，这是为了充分利用整个位范围.

I think they do it in this specific example to use the sign bit. Java lacks unsigned types, so it is not possible to emulate a >>> 1 with a /= 2 for numbers that use the most significant bit. Note how the code uses only >>> throughout your example. I am reasonably certain that this is to get full use of the entire bit range.