Java中是否有一个带符号的零整数？ [英] Is there a signed zero Integer in Java?

问题描述

我已经知道浮点数在java中有一个带符号的零。但我担心整数还没有：

I've learned that floating point number s have a signed zero in java. But I'm afraid Integer has not:

new Integer("0").equals(new Integer("-0")) // true

vs.

new Double("0").equals(new Double("-0")) // false

我如何存储零整数值的符号？

How could I store a sign with my zero Integer value?

推荐答案

您不能存储带有Java整数基元类型的符号。

You cannot store a sign with Java integer primitive type.

负零是 IEEE-754 表示的工件，它将符号存储在单独的位中。另一方面，整数存储在二进制补码表示中，该表示具有零的唯一表示。

Negative zero is an artifact of IEEE-754 representation, which stores a sign in a separate bit. Integers, on the other hand, are stored in two's complement representation, which has a unique representation for zero.

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