我怎样才能获得/设置个人位在浮动？ [英] How can I get/set individual bits in a float?

问题描述

我必须承认，在我所有的Java工作中，我从来没有遇到过需要Java联盟（比如C联盟，而不是SQL联盟），我在这里找不到答案。无可否认，我在Java中的大多数工作都比抽象的抽象更高。

我有一个整数，我正在设置个别位，我想打印出了等效的IEEE754单精度浮点数。

在C中，我会做类似于：

  union {
 int i; 
 float f; 
} x; 
 x.i = 0x27; 
 printf（％f \ n，x.f）; 
  

如何在Java中做类似的事情？是否有可能将相同的内存作为Java中的两种不同的数据类型对待？

我在SO和其他地方搜索了java union，但是它让我茫然SQL的东西 - 我找不到这样做的方法。

解决方案

我有一个整数我设置了
个别位，我希望
打印出等效的IEEE754
单精度浮点数。

使用 intBitsToFloat（）。

I have to admit in all my work with Java, I've never come across the need for a Java union (like the C union, not the SQL one) and I cannot find an answer here on SO. Admittedly, most of my work in Java has been at higher abstractions than bit-fiddling.

I have a integer which I'm setting individual bits for and I want to print out the equivalent IEEE754 single-precision float.

In C, I'd do something like:

union {
    int i;
    float f;
} x;
x.i = 0x27;
printf ("%f\n", x.f);

How do I do a similar thing in Java? Is it even possible to treat the same memory as two different data types in Java?

I did search on both SO and elsewhere for "java union" but it swamped me with SQL stuff - I couldn't find a way to do this.

解决方案

I have a integer which I'm setting individual bits for and I want to print out the equivalent IEEE754 single-precision float.

Use intBitsToFloat() for that.

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