Java中的Double.MIN_VALUE是否大于零？

Question

I found a bug in my code which boiled down to comparing Double(0.0) with Double.MIN_VALUE . Essentially, the following returns false:

System.out.println(0.0 > Double.MIN_VALUE);

How is this possible?

Answer 1

According to the javadoc for Double.MIN_VALUE , MIN_VALUE is:

A constant holding the smallest positive nonzero value of type double

So Double.MIN_VALUE is not negative, it's the positive value that's as close as a Double can get to zero (without being zero).

Answer 2

Double.MIN_VALUE是最小的正非零值，可以用Java double表示（请参阅http://download.oracle.com/javase/8/docs/api/java/lang/Double.html上的JavaDoc） 。